
The Duct Free Zone
A chain is only as strong as its weakest link. We have all heard that saying before and for many, the weakest link in the

Charging Residential Air Conditioning
Charging Residential Air Conditioning Different types of metering devices have different ways of charging. A Thermostatic Expansion Valve (TXV) is charged to the sub-cooling of

Predicting Compressor Failure
Good Housekeeping The most important factor in predicting compressor failure can be found by the cleanliness of the Oil. Virgin oil is clean, nonconductive

Proper HVAC Leak Detection
FINDING LEAKS IS AS EASY AS 1, 2… Do you want to learn all the shortcuts to successful leak detection? Do you know

Oil Additives and The POE Problem
In this episode, Zack and Ralph Interview John about a condition called the POE problem. John has studied oils and refrigerant additives for many

The Truth behind Stop Leak Oil additives
In this episode, Zack and Ralph Interview John about the Miracle Stop Leak oil additives. John takes you through the history of stop leak products

The Story of Refrigeration Technologies Part 2
In this episode, Zack and Ralph Interview John in more detail about Refrigeration Technologies including Proper Coil Cleaning techniques. He describes the proper way

The Story of Refrigeration Technologies Part 1
We think it’s important that you know who your buying your products from. In this recent interview, John talks about how Refrigeration Technologies was started.