Whether you’re putting an A/C unit in a new home or doing a retrofit, installation jobs make up a pretty big chunk of residential HVAC work.  Installation can be hard work, and there’s a lot more to it than throwing a unit together and making sure it starts up. When you consider building design, ductwork, […]

The chart above is from a Carrier heat pump, and it lists some common accessories. I have heard this common pressure switch (last on the list) called a low-pressure switch (because it opens on fall in pressure) and a high-pressure switch (because it's in the liquid line), but RARELY do I hear it called its […]

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 […]