HVAC Manufacturers Brands History

by | Technical Reference | 7 comments

HVAC Manufacturers Brands History - the following list is a history of HVAC Manufacturers Brands and how they have changed over the years from one owner to the next. The page is a bit outdated however the information, while in need of updating, remains valid for a historical record of how the major (and some minor) brands have changed hands over time. If you know of any updates or corrections please email us using the contact page. (more…)

Expansion Tank Water Level Valve | HVAC Heating & Cooling

by | Boilers | 0 comments

expansion tank water level valveExpansion Tank Water Level Valve - Airtrol Valves help maintain the proper level of water inside expansion tanks. The valve allows air and water to flow into the tank where the air level in the tank allows for a cushion for expansion and contraction of the water in the loop. Since liquids do not compress, the air is used as the compression medium in the expansion tank to allow the loop to expand and contract without setting off pressure relief valves. (more…)