#heat pump

Tech Tips:

Good COP – Bad COP
By:Adam MufichThere has been a lot of advice being tossed around by contractors and builders about the best time to use the emergency heat feature on an all-electric heat pump system. The answer is never! That was easy. Next article… In all seriousness, “Emergency Heat” should be used as described, ONLY during an emergency. I guess I […]
Read more
Thermal Balance Point
By:Matthew BrunerThermal balance point is a concept that is going to start mattering a lot more in years to come as more and more homeowners become interested in electrification. In almost all cases, the heat load for a house is larger than the cooling load; this is true even where I live in Dallas, Texas. […]
Read more
Diagnosing a Reversing Valve
By:Matthew BrunerIntroduction Replacing a reversing valve is either every technician’s dream or nightmare. The sheer amount of brazing involved in confined spaces will inspire either delight or nightmares about the upcoming valve replacement. Fortunately, these emotional highs and lows are uncommon because we don’t diagnose and replace bad reversing valves very often.  That itself poses […]
Read more
How a Heat Pump Reversing Valve Works
By:Bryan OrrIf you don’t have a gas furnace or fireplace in your home, your unit’s reversing valve is probably your best friend during the winter months.  As their name suggests, reversing valves reverse the refrigerant flow to send the hot, compressed vapor to the indoor coil instead of the outdoor coil. The system releases heat […]
Read more
Refrigerant Charging Basics For Air Conditioning & Heat Pump Systems
Before I start on this one… At HVAC School, we focus on a wide range of topics. Many of them are very basic. My experience as a trainer for over 16 years has taught me that no matter what I assume others SHOULD know, it doesn't change the fact that they often do not. This […]
Read more
Checking the Charge on a Heat Pump in the Winter
When you ask many people nowadays how to check the charge on a heat pump during low outdoor temps, they will say that you need to “weigh in and weigh out” the charge. While this may be an effective method, it isn't always practical. Now, if you are making a refrigerant circuit repair, weighing out […]
Read more
Pool Heat Pumps, The Basics
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 […]
Read more

Videos:

Podcasts:

When to Switch to Emergency Heat? – Short #190
By:Bryan Orr  In this short podcast episode, Bryan talks about when to switch to emergency heat. He talks about coefficient of performance (COP) and how it's a deciding factor when to run emergency heat, which is when a system ONLY runs the backup heat; it doesn't use it as supplementary heat. When we have […]
Read more
What’s Different About Pool Heaters w/ Bert
By:Bryan OrrBert Testerman  In this podcast, Bryan Orr and Bert discuss various aspects of pool heaters, focusing on issues that make them different from typical HVAC systems. They cover the basics of pool heaters – the main types (heat pumps and gas heaters) and how they operate similarly or differently from things HVAC techs […]
Read more
Checking a Heat Pump in Heat Mode – Short #178
By:Bryan Orr  In this short podcast, Bryan talks about checking the charge of a heat pump in heat mode. This skill will become more critical as ambient temperatures get cooler. The most reliable way to check and set the charge regardless of operating mode and season is to weigh the charge. This method is […]
Read more
Heat Pumps, Reversing Valves, and Defrost Podcast
By:Bryan Orr In this episode of HVAC School, Bryan covers the basics of heat pumps. Heat pumps are common technologies in Florida. They reverse the sequence of the typical refrigerant circuit: the indoor coil can become the condenser, and the outdoor coil can become the evaporator. Heat pumps can achieve that transition via a reversing […]
Read more

Events:

The Great Heat Pump Revolt of 2026 and How to Avoid It
By:Chris HughesRuss KingSteve Rogers NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.
Read more
Electrification in HVAC: An Update
By:Bill SpohnKimberly LlewellynJohn Hoehn NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.
Read more
Understanding Dual Fuel
By:Jim Fultz NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.
Read more
loading

To continue you need to agree to our terms.

The HVAC School site, podcast and daily tech tips
Made possible by Generous support from