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April 6, 2013 //

Cost to Install Split System Air Conditioner. Begin the Process of Developing Clean Air Ducts.

Air conditioning and heating systems circulate air through a network of ducts in a home’s crawl spaces. Filters are designed in most systems to trap dirt before it enters the ductwork, but over time these become dirty, too. A homeowner can clean the ducts without professional help by replacing filters and cleaning all duct covers and the ducts themselves with common household tools.

Begin the process of developing clean air ducts by determining if the ducts need cleaning. If grills appear covered with lint or other dirt, the ducts likely need cleaning. Even if the exterior of the grills appear clean, cleaning may be necessary, and this can be determined by removing the grill and inspecting the wall around it where the duct contacts the building material. If this area is dirty, the ducts need cleaning as well.

Split System AC Reviews. Replacement Filters.

Replacement filters and a number of common tools are required for the job. The homeowner will need gloves, soft brushes, rags, a screwdriver and a vacuum cleaner. A hose attachment for the vacuum with brush head for the hose also is necessary.

Turn the heating or air conditioning units off before starting to clean air ducts. Once off, remove and inspect air filters in the unit. Filters should be replaced at the suggested interval of the filter manufacturer, or about every six months. If the filter appears dirty, it likely needs replacing.

Remove all air duct and return vent covers. This will require the appropriate screwdriver, removing the screws carefully so as not to drop them in the ducts. Clean air ducts will not stay clean if the duct covers are dirty. Using the soft brush, thoroughly brush all grill surfaces then wipe with a damp rag and wipe again with a dry rag.

Install Split System Air Conditioning Units. Use the Vacuum Hose and Brush Attachment.

Clean air ducts themselves first by vacuuming the areas of the ducts that can be reached with the vacuum hose and brush attachment. Many ducts are made of metal, but some are soft-sided, and care should be taken not to puncture them. After vacuuming, gently brush the ducts, then wipe with a dry rag. Do not trap moisture in the duct system. Finally, vacuum the areas that can be reached again, being careful not to drop or leave any cleaning implements in the ductwork.

Replace all duct and return vent grills. If any of the grill cleaning was done indoors, vacuum the area where the cleaning took place. Regardless of where the cleaning was done, vacuum the area around the grills and the return vent covers.

Split System Air Conditioning Units Price. Dirt in Heater Fan Blades.

Dirt is easily trapped on heater fan blades and on air conditioning cooling coils. These can be cleaned as well, but it requires shutting off power to the units and removing fan and coil covers. Fan blades and coils can be cleaned with a vacuum hose and brush attachment. This is more complex work, and the homeowner should consider his or her ability to accomplish the task before beginning it. Professional help might be appropriate for these areas.

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By minisplitwarehouse | Link

April 5, 2013 //

Mirage HVAC. "Direct Exchange".

The Direct exchange geothermal heat pump is the oldest type of geothermal heat pump technology. The ground-coupling is achieved through a single loop, circulating refrigerant, in direct thermal contact with the ground (as opposed to a combination of a refrigerant loop and a water loop). The refrigerant leaves the heat pump cabinet, circulates through a loop of copper tube buried underground, and exchanges heat with the ground before returning to the pump.

The name "direct exchange" refers to heat transfer between the refrigerant loop and the ground without the use of an intermediate fluid. There is no direct interaction between the fluid and the earth; only heat transfer through the pipe wall. Direct exchange heat pumps, which are now rarely used, are not to be confused with "water-source heat pumps" or "water loop heat pumps" since there is no water in the ground loop. ASHRAE defines the term ground-coupled heat pump to encompass closed loop and direct exchange systems, while excluding open loops.

Mirage Ductless. Exchange Systems are More Efficient.

Direct exchange systems are more efficient and have potentially lower installation costs than closed loop water systems. Copper's high thermal conductivity contributes to the higher efficiency of the system, but heat flow is predominantly limited by the thermal conductivity of the ground, not the pipe. The main reasons for the higher efficiency are the elimination of the water pump (which uses electricity), the elimination of the water-to-refrigerant heat exchanger (which is a source of heat losses), and most importantly, the latent heat phase change of the refrigerant in the ground itself.

While they require more refrigerant and their tubing is more expensive per foot, a direct exchange earth loop is shorter than a closed water loop for a given capacity. A direct exchange system requires only 15 to 30% of the length of tubing and half the diameter of drilled holes, and the drilling or excavation costs are therefore lower. Refrigerant loops are less tolerant of leaks than water loops because gas can leak out through smaller imperfections. This dictates the use of brazed copper tubing, even though the pressures are similar to water loops. The copper loop must be protected from corrosion in acidic soil through the use of a sacrificial anode or other cathodic protection.

Mirage Mini Splits. Heat Pump Water Heating System.

The U.S. Environmental Protection Agency conducted field monitoring of a direct geoexchange heat pump water heating system in a commercial application. The EPA reported that the system saved 75% of the electrical energy that would have been required by an electrical resistance water heating unit. According to the EPA, if the system is operated to capacity, it can avoid the emission of up to 7,100 pounds of CO2 and 15 pounds of NOx each year per ton of compressor capacity (or 42,600 lbs. of CO2 and 90 lbs. of NOx for a typical 6 ton system).

Mirage Air Conditioners. Cooler and Hot Climates.

In Northern climates, although the earth temperature is cooler, so is the incoming water temperature, which enables the high efficiency systems to replace more energy that would otherwise be required of electric or fossil fuel fired systems. Any temperature above -40°F is sufficient to evaporate the refrigerant, and the direct exchange system can harvest energy through ice.

In extremely hot climates with dry soil, the addition of an auxiliary cooling module as a second condenser in line between the compressor and the earth loops increases efficiency and can further reduce the amount of earth loop to be installed.

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By minisplitwarehouse | Link

April 5, 2013 //

Lg Commercial Air Conditioners. Knowledge of internal circuitry.

An air conditioning repairman is a professional who is typically licensed and insured to repair air conditioning units in residential homes or businesses. The air conditioning repairman is also known as a repair technician. He generally receives training at a specialized school. Most air conditioning repairmen receive a degree in applied science.

To provide excellent service, the air conditioning repairman must be knowledgeable in the internal circuitry of air conditioning units. He may repair the heat pumps, compressors, and duct work of air conditioning systems. He often will work weekends and off-hours to provide emergency service.

Lg Split System Heat Pump. Cleaning Services.

An air conditioning repairman may face many issues in his daily job. He may need to fix an air conditioning coil that freezes up. He may be called in to rewire a thermostat that isn't working properly. He may also need to order specific parts for an air conditioner that is not operating efficiently. The air conditioning repairman's job often involves troubleshooting electrical problems.

In many cases, an air conditioning repairman will also provide duct work cleaning services. This generally means cleaning air ducts to expel dust and mold that may pose a health concern. This service may be part of routine maintenance.

Lg Split Senville System. Maintenance Tips.

The repairman does work on both central air units and window units. In addition to repair work, he may also do installation as well. As part of his duties, an air conditioning repairman may also perform evaluations. In most cases, he routinely inspects all air conditioning parts and performs diagnostic testing to find an effective solution. After repair work is completed, the repairman may offer advice on how to maintain an energy-efficient air conditioning system.

Lg Split System Air Conditioners. Repair of other devices.

The air conditioning technician may also do refrigeration repairs. While not every air conditioning repairman works on refrigerator units, many are qualified and also work on plumbing and heating as well. He may also repair dehumidifiers and water coolers. This type of technician will generally be able to read blueprints, as this may be an essential part of his job.

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By minisplitwarehouse | Link

April 5, 2013 //

Mini Split Air Conditioning System. Exterior wall mounted.

A packaged terminal air conditioner (PTAC) is a self contained heating and cooling device commonly used in smaller areas such as the rooms in houses, apartments, and hotels. Larger commercial air conditioning units consist of separate condenser and evaporator sections often positioned a significant distance from each other. The PTAC combines the parts of the air conditioning unit in one package which typically mounts through an exterior wall. This type of mounting arrangement places the evaporator coil, fan, and controls inside the room with the condenser coil and compressor on the outside. This allows the PTAC to effectively maintain optimal temperatures while shedding heat into the outside air.

Mini Split Air Conditioning Units. Autonomous.

Large air conditioners usually feature separate condenser and evaporator units connected by lengthy pipe runs. Commonly known as splits, these units are appropriate for applications where interior spaces with no exterior walls or very large areas are involved. In smaller spaces with exterior walls such as the rooms in a home, office complex, apartment block, or hotel, the packaged terminal air conditioner is a more suitable option. Consisting of a single, self contained unit, the PTAC combines all the equipment needed for the heat exchange process. These units are generally mounted through an existing exterior wall in a specially designed sleeve or enclosure.

Aircon Minisplit AC. Discrete System.

The average packaged terminal air conditioner will generally mount with the majority of the unit located within the wall cavity and outside the building, leaving only a fairly slim console inside the room. This, in conjunction with attractive grills and covers, makes the packaged terminal air conditioner unobtrusive and easy on the eye. The interior part of the PTAC usually contains the evaporator coil, filters, fan, and the air conditioner controls. The piping, compressor, and condenser coil and fan are then located within the body and on the outside face of the unit. This allows the release of heat into the outside air while maintaining desired temperatures within the room.

Mini Split Air Conditioner. Capacity Options.

The interior console of the packaged terminal air conditioner generally includes a grill consisting of adjustable louvers which can be positioned to ensure efficient distribution of the airflow. The controls of the unit may be situated on the unit alone or incorporate separate, remote controls. The aesthetic appeal of the PTAC is usually ensured by a good selection of enclosure colors and designs to complement most decor themes. There is also a wide range of available PTAC capacity options with average unit ratings running between 5,000 to 20,000 Btu.

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By minisplitwarehouse | Link

April 5, 2013 //

Installing a Mini Split AC System. Basic Mechanical Skills.

In order to become an air conditioning mechanic, you may want to take an interest in mathematics, shop, and automotive subjects as early as high school. Students who choose this profession are given various opportunities in high school to work with machinery, including engines and power tools. This may give you the opportunity to learn basic mechanical skills that are needed to become an air conditioning mechanic. If you become interested in this profession after high school, there are various courses and programs that you can enroll in to enhance your knowledge of the industry.

AC Split System Price. Certification to Work on both Residential and Commercial AC.

Many community colleges and vocational schools offer extensive training programs, and you may want to consider working towards certification in air conditioning and heating. This is an ideal option because many locations will require a mechanic who is able to repair both types of units. Courses in these training programs may cover topics such as ventilation, air conditioning processes, air quality, and possibly refrigeration as well. Many of these programs are designed to give you the necessary credits to obtain certification to work on both residential and commercial air conditioning units in your local jurisdiction.

AC Split System Install. Increase your Chances to Become an Air Conditioning.

Aside from certification, you can increase your chances to become an air conditioning mechanic by working on your associate's degree in air conditioning. An associate's degree program will cover additional subjects in the field, which may include major appliance service and repair, heating systems, electrical troubleshooting, air conditioning installation, repair and service, and safety procedures. This program generally takes two years and will prepare you for any local examinations that you may need to take to become an air conditioning mechanic.

Cost to Install Split System Air Conditioner. Hands-on experience is essential.

Finding a job at an air conditioner repair company can also help you successfully enter this profession, and most employers will be seeking an experienced mechanic. Hands-on experience is essential because this job is based on physically working with air conditioner components, and in order to successfully become an air conditioning mechanic you will need to have excellent hand-eye coordination. Companies are usually seeking applicants who are friendly, organized, and computer literate.

Most of these positions will require that you have a valid driver's license because you generally need to travel to job locations, such as residential homes or professional buildings. Interpersonal traits are important because you are often working one-on-one with customers. You will also need a comfortable demeanor and must have the ability to explain technical problems to laymen.

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By minisplitwarehouse | Link

April 5, 2013 //

Panasonic Split Air Conditioner Specifications. Ground Source Heat Pumps the Most Energy-Efficient.

The US Environmental Protection Agency (EPA) has called ground source heat pumps the most energy-efficient, environmentally clean, and cost-effective space conditioning systems available. Heat pumps offer significant emission reductions potential, particularly where they are used for both heating and cooling and where the electricity is produced from renewable resources.

Ground-source heat pumps have unsurpassed thermal efficiencies and produce zero emissions locally, but their electricity supply includes components with high greenhouse gas emissions, unless the owner has opted for a 100% renewable energy supply. Their environmental impact therefore depends on the characteristics of the electricity supply and the available alternatives.

Panasonic Split Air Conditioner. Ground-Source Heat Pumps.

Ground-source heat pumps always produce less greenhouse gases than air conditioners, oil furnaces, and electric heating, but natural gas furnaces may be competitive depending on the greenhouse gas intensity of the local electricity supply. In countries like Canada and Russia with low emitting electricity infrastructure, a residential heat pump may save 5 tons of carbon dioxide per year relative to an oil furnace, or about as much as taking an average passenger car off the road. But in cities like Beijing or Pittsburgh that are highly reliant on coal for electricity production, a heat pump may result in 1 or 2 tons more carbon dioxide emissions than a natural gas furnace. For areas not served by utility natural gas infrastructure, however, no better alternative exists.

Panasonic Split Air Conditioner 1.5 Ton. Gas R410A.

The fluids used in closed loops may be designed to be biodegradable and non-toxic, but the refrigerant used in the heat pump cabinet and in direct exchange loops was, until recently, chlorodifluoromethane, which is an ozone depleting substance. Although harmless while contained, leaks and improper end-of-life disposal contribute to enlarging the ozone hole. For new construction, this refrigerant is being phased out in favor of the ozone-friendly but potent greenhouse gas R410A. The EcoCute water heater is an air-source heat pump that uses Carbon Dioxide as its working fluid instead of Chlorofluorocarbons.

Open loop systems (i.e. those that draw ground water as opposed to closed loop systems using a borehole heat exchanger) need to be balanced by reinjecting the spent water. This prevents aquifer depletion and the contamination of soil or surface water with brine or other compounds from underground.

Panasonic Split Air Conditioner Price List – Heating Project in Staufen im Breisgau.

Before drilling the underground geology needs to be understood, and drillers need to be prepared to seal the borehole, including preventing penetration of water between strata. The unfortunate example is a geothermal heating project in Staufen im Breisgau, Germany which seems the cause of considerable damage to historical buildings there. In 2008, the city centre was reported to have risen 12 cm, after initially sinking a few millimeters. The boring tapped a naturally pressurized aquifer, and via the borehole this water entered a layer of anhydrite, which expands when wet as it forms gypsum. The swelling will stop when the anhydrite is fully reacted, and reconstruction of the city center "is not expedient until the uplift ceases." By 2010 sealing of the borehole had not been accomplished. By 2010, some sections of town had risen by 30 cm. Ground-source heat pump technology, like building orientation, is a natural building technique (bioclimatic building).

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By minisplitwarehouse | Link

April 5, 2013 //

Mitsubishi Mr Slim – Energy Costs.

Due to rising energy costs, many homeowners are opting to replace their old manual thermostats with newer digital, programmable thermostats. Experts estimate that the decision to update a thermostat can save a homeowner up to 35% in energy costs per year. Instead of maintaining a constant temperature for 24 hours a day, seven days a week, like a manual thermostat, a digital thermostat can be set to turn off during the day when the family is at work or school and to kick on when they come home. Different programs can also be established for weekends and evenings. Replacing a thermostat is usually not very difficult, and only requires a few common tools.

Mitsubishi Split System Reviews – Compatibility.

When purchasing a replacement thermostat, a homeowners should be sure to confirm that the new one is compatible with the home’s heating and cooling system. Although many people choose to replace their thermostat with a digital model, manual styles are available and are less expensive. Most employees at the local hardware store’s electrical section can help with this choice. The only tools required are a standard screwdriver, a drill, a level, and masking tape. For safety, many experts recommend wearing safety goggles when changing a thermostat.

Senville Mitsubishi Split System – Important Precautions.

As with any electrical project, a homeowner should always turn off the power first to avoid a shock. Although the wires in a thermostat are low voltage, it is smart to turn off the power before touching any wires. This can be accomplished at the fuse or breaker box, or a switch may be located around the heating and cooling unit. If the breakers are not individually marked, a homeowner may need to shut off power to the entire house.

Split System Air Conditioner – Why are you changing?

When a homeowner decides to change a thermostat, he or she is making the first step in updating an important system in the home. This is a relatively simple home repair, but as with any electrical job, if it becomes overwhelming or confusing, an electrician can always be called to finish the job. Once the job is finished, many older thermostats have mercury switches, making them hazardous waste. They must be disposed of properly, according to city ordinances.

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By minisplitwarehouse | Link

April 4, 2013 //

Sanyo Split Type Air Conditioner. The Principle of Air Conditioning.

In 1842, Lord Kelvin invented the first air conditioner. In order to achieve a pleasant and healthy, the scientist created a hermetic refrigeration system based on the absorption of heat through a cooling gas. This was based on three principles:

Heat is transferred from the higher temperature to the lowest, as when introducing coffee cool a metal spoon and the cup absorbs this heat. The state change of the liquid to gas it absorbs heat. For example, if alcohol moisten hand, feel cold when it evaporates as it absorbs heat from your hand. The temperature and pressure are directly related. In a closed container, such as a pot, need to provide less heat to reach the same temperature as open one.

An air conditioner is used, as the name implies, for the air conditioning. This is the most comprehensive process of treatment in a closed environment and regulate temperature is either heating or cooling, humidity, renewal or air circulation and cleaning, ie its filtering or purification.

Fujitsu Split Type Air Conditioner. Important Role in Modern Medicine.

Air conditioning plays an important role in modern medicine, from its applications in baby care and operating rooms to its uses in research laboratories. Without precise control of temperature and humidity, microprocessors, integrated circuits and high-tech electronics could not be produced. The computer centers would stop working.

Many manufacturing processes need not be possible. The flight of aircraft and spacecraft would be just a dream. Valuable minerals could not be extracted from the depths of the earth and the architects could not have designed the huge buildings that have changed the face of the world's largest cities.

Aircon Split Type Air Conditioner. The "Father of Air Conditioning.

Carrier, a recent graduate of Cornell University with a Master of Engineering, had just been employed by the Buffalo Forge Company, at a salary of $ 10 weekly. The young man began to investigate how tenaciously the problem and designed a machine that controlled the temperature and humidity through tubes cooled, resulting in the first air conditioning unit in history.

The invention of printing was happy to Brooklyn, he was finally able to have a stable environment that allowed for four-color printing without any complications. The "Apparatus for Treating Air" was patented in 1906.

Although Willis Haviland Carrier is recognized as the "father of air conditioning," the term "air conditioning" was first used by the engineer Stuart H. Cramer, patent of a device sending steam to air in textile plants to condition yarn.

Southern textile industries of the United States were the first to use the new Carrier system. For example, the Chronicle Cotton Mill factory in Belmont, North Carolina, which had a big problem. Due to the absence of moisture, creating an excess of static electricity, making cotton fibers fray and be difficult weave. Carrier system rose and stabilized humidity for conditioning the fibers, thereby resolving the issue.

Because of its quality, a large number of industries were interested in the Carrier apparatus. The first sale was made abroad in 1907, to a silk factory in Yokohama, Japan.

Split Type Air Conditioning System vs. The Air-Conditioned Comfort is Spread Worldwide.

Heat and cold people feel not only depend on the temperature, but also the proper humidity and air distribution. Air conditioning is the treatment process that simultaneously controls air temperature, humidity, cleanliness and distribution to meet the demands of the conditioned space. Heat is a form of energy directly related to molecular vibration. When we heat a substance, its molecules move faster, thus generating energy, heat. If we cool, the molecular movement is stopped, lowering the temperature.

Humidity refers to the amount of water contained in the air and is directly related to the sensation of wellbeing. Ambient air is controlled to maintain the preset humidity by humidification or dehumidification of the ambient air. To obtain the desired comfort, it is necessary that the air is distributed evenly and circulate throughout the enclosure, without producing unpleasant currents.

Finally, for good health, it is necessary to remove dust particles. The air filter is a basic work of an air conditioning and each day is given more importance when purchasing an air conditioner.

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By minisplitwarehouse | Link

April 4, 2013 //

How to Install Split AC?. Casette Window and Ceiling.

A square box contains all the functional parts of the system. It should be placed in a hole in the wall practiced so that one half of the device remains outside and half inside. Advantages: Low cost of installation. Easy maintenance. Disadvantages: They tend to consume a little more power. They are usually noisy and in some communities are not allowed to have to make a big hole in the wall of the building.

Its operation is similar to the wall but usually larger capacity. Installation is more costly and complex. Advantages: High capacity in a single unit (from 36,000 to 60,000 BTU) very suitable for large spaces. Disadvantages: High cost of installation. They tend to be more noisy.

How to Install a Split Rail Fence? Wall Console.

Are most air conditioners are being installed today as they have many advantages over the window and are relatively inexpensive. The unit contains the compressor is on the outside of the building and is connected to the indoor unit (evaporator – condenser) through tubes so that the hole in the wall to practice is relatively small. The variety offered is very wide powers. Advantages: Noise levels are very low and are very aesthetic, especially the next generation. Maintenance is simple. Disadvantages: The installation is more complicated than models window so its cost is higher. It is difficult to place in certain places, such as prefabricated parades.

Install Split Unit AC. Portable Air Conditioner.

Entire system incorporated in a box attached with wheels so that it can be transported easily from one room to another. It has a flexible hose that expels the hot air to the outside. Advantages: Does not require installation. Are easily transported and emit very little noise. Disadvantages: They tend to be quite expensive when you consider the value. There are very powerful.

How to Install Split Air Conditioner?. Air Conditioning Duct.

The idea is the same as in the split type installation but is much greater. Used in full conditioning of buildings. Its cost is very high but offer a high level of comfort. Advantages: adds much value to the house that has them. Maintenance is simple and spaced in time. Disadvantages: High cost of installation, use of ducts, soffits and ceiling linings.

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By minisplitwarehouse | Link

April 4, 2013 //

Window AC Unit – Coefficient of Performance (COP)

When comparing the performance of heat pumps, it is best to avoid the word "efficiency" which has a very specific thermodynamic definition. The term coefficient of performance (COP) is used to describe the ratio of useful heat movement per work input. Most vapor-compression heat pumps use electrically powered motors for their work input. However, in many vehicle applications, mechanical energy from an internal combustion engine provides the needed work.

When used for heating a building on a mild day, for example 50 °F, a typical air-source heat pump (ASHP) has a COP of 3 to 4, whereas an electrical resistance heater has a COP of 1.0. That is, one joule of electrical energy will cause a resistance heater to produce only one joule of useful heat, while under ideal conditions, one joule of electrical energy can cause a heat pump to move much more than one joule of heat from a cooler place to a warmer place. Note that an air source heat pump is more efficient in hotter climates than cooler ones, so when the weather is much warmer the unit will perform with a higher COP (as it has less work to do). Conversely in extreme cold weather the COP approaches 1. Thus when there is a wide temperature differential between the hot and cold reservoirs, the COP is lower (worse).

India Unit – Ground-Source Heat Pumps (GSHP)

On the other hand, ground-source heat pumps (GSHP) benefit from the moderated temperature underground, as the ground acts naturally as a store of thermal energy. Their year-round COP is therefore normally in the range of 2.5 to 5.0.

When there is a high temperature differential on a cold day, (e.g., when an air-source heat pump is used to heat a house on a cold winter day of (32 °F)), it takes more work to move the same amount of heat to indoors than on a mild day. Ultimately, due to Carnot efficiency limits, the heat pump's performance will approach 1.0 as the outdoor-to-indoor temperature difference increases for colder climates (outside temperature gets colder). This typically occurs around (0 °F) outdoor temperature for air source heat pumps.

Also, as the heat pump takes heat out of the air, some moisture in the outdoor air may condense and possibly freeze on the outdoor heat exchanger. The system must periodically melt this ice. When it is extremely cold outside, it is simpler, and wears the machine less, to heat using an electric-resistance heater rather than to overload an air-source heat pump.

Split AC Unit – Heat Exchangers.

The design of the evaporator and condenser heat exchangers is also very important to the overall efficiency of the heat pump. The heat exchange surface areas and the corresponding temperature differential (between the refrigerant and the air stream) directly affect the operating pressures and hence the work the compressor has to do in order to provide the same heating or cooling effect. Generally, the larger the heat exchanger the lower the temperature differential and the more efficient the system becomes.

Heat exchangers are expensive, requiring drilling for some heat-pump types or large spaces to be efficient, and the heat pump industry generally competes on price rather than efficiency. Heat pumps are already at a price disadvantage when it comes to initial investment (not long-term savings) compared to conventional heating solutions like boilers, so the drive towards more efficient heat pumps and air conditioners is often led by legislative measures on minimum efficiency standards.

In cooling mode, a heat pump's operating performance is described in the US as its energy efficiency ratio (EER) or seasonal energy efficiency ratio (SEER), and both measures have units of BTU/(h·W) (1 BTU/(h·W) = 0.293 W/W). A larger EER number indicates better performance. The manufacturer's literature should provide both a COP to describe performance in heating mode, and an EER or SEER to describe performance in cooling mode. Actual performance varies, however, and depends on many factors such as installation, temperature differences, site elevation, and maintenance.

SEER Rating – More Effective for Heating than for Cooling.

Heat pumps are more effective for heating than for cooling an interior space if the temperature differential is held equal. This is because the compressor's input energy is also converted to useful heat when in heating mode, and is discharged along with the transported heat via the condenser to the interior space. But for cooling, the condenser is normally outdoors, and the compressor's dissipated work (waste heat) must also be transported to outdoors using more input energy, rather than being put to a useful purpose. For the same reason, opening a food refrigerator or freezer actually heats up the room rather than cooling it because its refrigeration cycle rejects heat to the indoor air. This heat includes the compressor's dissipated work as well as the heat removed from the inside of the appliance.

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