The most common ceiling air diffuser uses a pattern of concentric circles or squares. The openings between the slots force air more horizontally from the outer rings and gradually more vertically approaching the center. This balanced design sends cool air in all directions.

Vent diffusers disperse pressurized air exiting heating ventilation and air conditioning (HVAC) ductwork and provide a decorative finish over the grill box hole holding the ductwork in place. Without an air diffuser, the air exiting the HVAC system would travel in a straight direction. This causes a concentration of conditioned air in one section of the room while the rest of the room remains unconditioned. The direction that a vent diffuser sends flowing air depends on the direction of the diffuser fins.

An outlet thermostats is a device that helps homeowners save money by reducing the electricity consumption of portable heat and air conditioning systems. An outlet thermostat connects to an electrical outlet and manages the power supply based on the room temperature. These thermostats are used for space heaters or cooling systems that use wall electric outlets.

Many people use the outlet thermostat to control fans and window-mounted air conditioning systems. This thermostat will automatically turn on an electric fan once the room temperature reaches a specific setting. This adds comfort and convenience to older homes that don’t have centralized air conditioning systems.

A variety of cooling agents, or refrigerants, are used in the average household. Freon® in air conditioning units, hydrofluorocarbons (HFCs) in refrigerators, and chlorofluorocarbons (CFCs) in aerosolized products are just a few common examples of refrigerants encountered on a daily basis. While these chemicals have their uses, it has also been proven that they can harm the environment and deplete the earth's ozone layer when left unchecked or disposed of improperly.

Refrigerant recovery is a sector of the environmental industry that works to collect and re-purpose these and other such chemicals, or to properly dispose of the chemicals in a manner that does not harm the environment.

Many HVAC technicians are trained to handle the process of refrigerant recovery. The exact method and process of recovery is based upon the type of refrigerant and the size of the equipment that the refrigerant is being extracted from. A small window air conditioner compressor, for example, can be emptied and re-purposed on-site by a knowledgeable technician. While some refrigerants can be recovered on-site, others must be extracted and sent to a reclamation facility by technicians with more advanced training and equipment.

The Alliance for Responsible Atmospheric Policy governs the processes, training procedures and policies surrounding refrigerant recovery worldwide. To find a licensed technician or training programs to become a technician, a consultation with the Alliance for Responsible Atmospheric Policy is recommended. Local governments also may have specific requirements. The United Nations Environmental Programme (UNEP) also has a hand in creating policies and training technicians to carefully and safely execute the processes involved in recovery.

 

A refrigerant recovery machine is a device which can be used to remove refrigerant from a cooling system such as a freezer, refrigerator, or air conditioning system. Several companies manufacture refrigerant recovery machines, and there are a number of applications for these devices. Due to concerns about environmental pollution caused by the release of refrigerants into the environment, many nations require people to have a certification before they can operate a refrigerant recovery machine, demonstrating that they know how to operate the machine safely and correctly.

When any device which uses refrigerant is brought in for service, the refrigerant recovery machine is used to drain the device first, to ensure that refrigerant is not accidentally released during servicing and repairs. Once removed, the refrigerant can be filtered to remove impurities, and pumped back into the device after the cleaning and servicing is over. Refrigerants can also be reclaimed, which involves more extensive processing to purify the refrigerant so that it can be released for sale, and they can also be disposed of in locations which are designed to process refrigerants.

Refrigerant recycling is environmentally important because it reduces the need to produce more refrigerants. Processing facilities are also slowly removing and disposing of harmful refrigerants like Freon by taking the refrigerant out of old appliances. Proper disposal is critical for older refrigerants which have been linked with damage to the Earth's atmosphere, and for modern refrigerants which are considered safe, recycling still saves money and reduces stress on the environment.

A refrigerant pump is part of a heating, ventilating, and air conditioning (HVAC) unit. An HVAC unit is responsible for heating and cooling the interior of buildings. The unit may also filter fresh air drawn in from the outside and expel indoor air to reduce contamination levels. Other refrigeration equipment, such as refrigerators and freezers, also use a refrigerant pump.

An air conditioning system works by cooling air that is pumped inside and circulated. A refrigerant pump is part of that system. The liquid refrigerant is located in the bottom of the evaporator where it flows up and over a set of cooling coils. As the liquid flows through this cooling loop, it absorbs heat and starts to boil. Once it boils, it turns into vapor known as Freon™.

The vapor then is pulled into a piece of equipment known as a compressor via suction pressure on the inlet lines. The refrigerant pressure builds up in the compressor as the refrigerant vapor also absorbs heat from the mechanical movements inside the refrigerant pump and other moving parts. This flow of vapor becomes extremely hot which also increase the pressure inside the compressor. As the pressure builds, the compressor discharges the vapor through and outlet line which moves it to the condenser.

The goal is to build a structure with maximum efficiency to cut down on the expenses associated with heating and cooling. A number of factors contribute to heat inside a structure. One consideration is the temperature measured directly versus the temperature and the humidity examined together. 

High humidity can make low temperatures seem higher, and a building in humid conditions will have a higher cooling load, as more energy will be required to make the space comfortable for occupants. Humidity also plays a role in the heating load.