I've been reading a book called Cool: How Air Conditioning Changed Everything, and it got me interested once again in the history of air conditioning and refrigeration. Like many things, the people who are credited with “inventing” are the ones dogged enough to make an idea commercially successful, not the idealists forever tucked away in the […]

For those of you who use the MeasureQuick app for system diagnosis and performance testing, you may have noticed the “fan efficacy” results and wondered what it is. It is simply the CFM output of the system divided by the wattage used by the blower. It is only for the blower motor and has nothing […]

Depending on what segment of the business you are in and your location, you either work on pump down solenoid systems all the time, or YOU HAVE NO CLUE what they are. A liquid line solenoid is just a valve that opens and closes; it has a magnetic coil. Depending on whether the valve is […]