Our comprehensive HVAC Systems Help Center covers a wide range of HVAC-related topics, including air conditioning and heat pumps, geothermal, hot-water heating, thermostats and controls, solar, steam heating, and warm air. We also have a section of informative and entertaining articles to help you sharpen your HVAC business skills. And our Heating Museum is a captivating journey through the evolution of HVAC technologies.
When I was still young and very wet behind the ears I worked for a manufacturers representative in New York City and we sold Bell & Gossett pumps to wholesalers. It was m...
In 1994, I wrote a book called, Pumping Away, which I began by remembering the late, great Gil Carlson. Here's what I wrote: When I knew Gil Carlson, he was never far fro...
If you're watching the news you probably realize that, these days, Americans are becoming more conscious of green things, as well as rising fuel prices. I think that's go...
When servicing old hot-water heating systems that originally circulated by gravity, but now use circulating pumps, I began to notice a lot of oversized circulators. In so...
I was lucky to have had as one of my teachers the late, great Gil Carlson. Gil was Bell & Gossett’s Director of Technical Services and when he would come to New York City...
In 1970, I went to work for a manufacturers rep on the Isle of Long and I fell in love with hydronics. We sold Bell & Gossett and one of the elder salesmen took me aside ...
About eight blocks from my house in Baltimore, there is a large two-family house with an equally large hot-water heating system that originally circulated by gravity. The...
When you look in a boiler manufacturer's catalog you'll see that there are several types of ratings for each boiler. There's the Input rating, the Gross Output rating (wh...
I am often asked about troubleshooting a thermocouple on gas systems. This will be a permanent reference that will give a step-by-step procedure: A thermocouple is a devi...
A question asked on the Wall, "Who, in your opinion, makes the best modulating-condensing boiler?" Andrew Hagen replies: My favorites in order: 1. Viessmann Vitodens 2. T...
