In-depth articles on every HVAC system, component, and concept. Browse by topic or search below.
Air filtration is the primary line of defense against airborne contaminants in both residential and commercial buildings. Every time a forced-air HVAC…
The compressor is the mechanical heart of every HVAC system. It drives the refrigeration cycle by compressing low-pressure refrigerant vapor into high-pressure,…
A mini-split system is a type of heat pump or air conditioner that delivers conditioned air without ductwork. It consists of an…
A boiler is a closed vessel that heats water to produce hot water or steam for space heating, domestic hot water, or…
An air handler, also called an air handling unit (AHU), is a factory-assembled device that conditions and circulates air as part of…
What Variable Speed Compressors Are and Why They Matter A variable speed compressor adjusts its output continuously to match the exact heating…
What the Defrost Cycle Does and Why It Matters A heat pump defrost cycle is an automatic process that removes frost and…
A gas furnace is the most common heating appliance in North American homes, burning natural gas or propane to generate warm air…
Static pressure is the force that air exerts against the interior surfaces of ductwork, plenums, and HVAC components as the system pushes…
A thermostat is the command center of any HVAC system, translating temperature preferences into electrical signals that activate heating, cooling, and ventilation…
Ductwork is the circulatory system of any forced-air HVAC installation. It carries conditioned air from the furnace, air conditioner, or heat pump…
Refrigerants are the working fluids that make air conditioning and heat pump systems possible. They absorb heat from indoor spaces and release…