EER, or Energy Efficiency Ratio, is a measurement used to show how efficiently an HVAC system, such as an air conditioner or heat pump, operates at a steady state. It is calculated by dividing the system’s cooling output (measured in BTUs) by the energy it consumes (measured in watts) under specific conditions. A higher EER...

Electronic air cleaners, also known as ionizers or electronic air purifiers, are devices used in HVAC systems to remove airborne contaminants. These cleaners work by charging particles in the air as it passes through the system. The charged particles are then attracted to oppositely charged collector plates or filters inside the cleaner, effectively trapping harmful...

An Electronic Air Cleaner (EAC) is an advanced air filtration device used in HVAC systems to remove airborne pollutants from indoor air. It works by using electrically charged plates or wires to ionize dust, pollen, smoke, and other particles, giving them an electric charge. These charged particles are then attracted to and captured on oppositely...

Energy Efficiency Ratio (EER) is a measurement of how efficiently an air conditioning system operates under specific conditions. It is calculated by dividing the cooling capacity (measured in British Thermal Units or BTUs per hour) by the electrical power input (in watts) needed to achieve that capacity. A higher EER indicates a more energy-efficient system,...

An energy recovery ventilator (ERV) is a mechanical system used in HVAC to improve indoor air quality and energy efficiency. It functions by exchanging stale, polluted indoor air with fresh outdoor air while transferring heat and moisture between the air streams. This means that in cold weather, it recovers heat and moisture from the outgoing...

ENERGY STAR® is a program established by the U.S. Environmental Protection Agency (EPA) and the Department of Energy (DOE) to promote energy efficiency. It certifies products, buildings, and systems that meet strict energy performance criteria, often exceeding government efficiency requirements. ENERGY STAR® certified products typically use at least 20 to 30 percent less energy than...

The U.S. Environmental Protection Agency (EPA) is a federal agency responsible for protecting human health and the environment by creating and enforcing regulations based on laws passed by Congress. In the context of HVAC, the EPA oversees programs like ENERGY STAR®, which promotes energy-efficient products and practices, and regulates substances such as refrigerants to minimize...

An evaporative cooler, also known as a swamp cooler, is a device that lowers air temperature by drawing air through moisture-saturated pads. As the air passes over the wet pads, the water evaporates and absorbs heat, cooling the air. This type of cooling works best in hot, dry climates where humidity levels are low, as...

A key component in an HVAC system that is responsible for cooling indoor air. The evaporator consists of coils through which liquid refrigerant flows. As warm air from inside the building is blown across the coils, the refrigerant inside absorbs heat and evaporates, turning into a gas. This process cools the air, which is then...

The evaporator coil is a crucial component of an air conditioning or heat pump system that absorbs heat from the indoor air as part of the cooling process. It contains cold refrigerant, which pulls heat from the air blown over the coil. This cooled air is then circulated back into your home. The evaporator coil...