Let's get something out of the way right off the top: saying that we learn best “hands-on” is sort of like saying we prefer to breathe air. WE ALL NEED TO APPLY THINGS TO LEARN THEM DEEPLY! David Sandler wrote the book You Can't Teach a Kid to Ride a Bike in a Seminar, and […]

Why Defrost? Let's start with the basics and move on from there. Defrost is necessary when the coil temperature drops below 32°F. Defrost can be as simple as turning the compressor off for a period of time or as elaborate as reversing the flow of refrigerant for the whole system or just parts of the […]

Note: My brother Nathan wrote this a few years back, and I only did some minor editing. A pool heat pump is essentially a water-cooled air conditioner in reverse. It usually has a large air evaporator on the outside that looks like a condenser coil and a heat exchanger (usually tube-in-tube) on the inside. A […]