First, let's get something straight: BRAZING is when you use a filler rod that isn't the same material as the base metal but melts ABOVE 840°F. Soldering is the same but at temperatures BELOW 840°F. With HVAC rods melting at around 1200°F, it confuses me why we usually call it “silver solder” but also often call it […]

Ohm’s law is pretty straightforward; you multiply ohms by amps to get the voltage. Using variable E to represent voltage, variable I for amps, and variable R for ohms, the equation for Ohm’s law looks like this:  E = I × R  You can figure out the number of amps in a system using basic […]

This photo is of a blower door test we performed at my own house using a Retrotec blower door. You will notice the 15-passenger van outside the window, which is a dead giveaway. A blower door is used to measure the tightness of a building and is often discussed in terms of an ACH50 number. […]