In-depth articles on every HVAC system, component, and concept. Browse by topic or search below.
ASHRAE Standard 90.1, formally titled Energy Standard for Buildings Except Low-Rise Residential Buildings, establishes the minimum energy efficiency requirements for commercial buildings…
The building envelope is the physical barrier between a building's conditioned interior and the outside environment. It includes walls, roof, foundation, windows,…
ENERGY STAR HVAC certification marks heating and cooling equipment that meets efficiency standards set well above federal minimums. Administered by the Environmental…
The Inflation Reduction Act (IRA), signed into law in August 2022, created the largest federal investment in residential energy efficiency in U.S.…
Blower motors are the workhorses of every forced-air HVAC system. They push conditioned air through ductwork, directly affecting comfort, efficiency, and indoor…
What Condensate Is and Why It Matters Every air conditioning system and heat pump in cooling mode produces condensate, the water that…
Refrigerant leak detection is the process of locating and quantifying the escape of refrigerant from a sealed HVAC or refrigeration system. A…
Proper refrigerant charging is one of the most critical skills in HVAC service work. A system that is overcharged or undercharged by…
Understanding HVAC Electrical Components Electrical failures account for the majority of HVAC service calls. Three components sit at the center of most…
ASHRAE Standard 62.2, formally titled Ventilation and Acceptable Indoor Air Quality in Residential Buildings, establishes the minimum ventilation rates and system requirements…
Indoor air quality (IAQ) refers to the condition of the air inside buildings as it relates to the health, comfort, and productivity…
Humidity control is one of the most important and most overlooked aspects of residential HVAC. Too much moisture in the air promotes…