On an energized, intact circuit, you will read voltage across an OPEN switch when testing with a voltmeter. However, you probably won't read significant voltage across a CLOSED switch. Both sides of a closed switch are electrically identical (or at least very close). Therefore, there should be no movement of electrons between the leads of […]

Whether you’re a business owner or want to create an HVAC education program, you’re going to need to create an identity for your organization and put it out there. That’s called “branding” or “creating a brand.” Nowadays, we hear the term “brand” thrown around quite often with influencers and large corporations. As such, the word […]

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 […]