Full disclosure: as a technician, I was guilty of setting the fan to “on” at the thermostat for many years. I never really thought of any of the negative impacts that could happen. I wanted to circulate the air and keep air moving through the high-efficiency air filter that most of our houses had. Later, I […]

If you own an HVAC or refrigeration business, there may be times when you think giving a discount might be the right thing to do. Maybe you have a friend who’s having a hard time and suddenly has an evaporator coil leak that needs attention. You may consider offering him a discount to help him […]

The amount of pressure you're under depends on where you live. I live in Florida, so I'm very close to sea level. Therefore, the weight of the atmosphere is exerting exactly 14.7 pounds per square inch (PSIA) of pressure on every surface in every direction. There is no such thing as negative pressure—only pressure lower […]