In the fall of 2019, we built a greenhouse to overwinter tropical plants. We needed to find a heating
source for the freezing St. Louis temperatures. Gas and propane heaters would have been an extremely
difficult installation. Electric heat would be the easiest to install, but everything I had heard was that it
was the most expensive to operate. A local news program spotlighted Thermasi high efficient electric
furnaces. I called and talked to the owner Allen Coggins to see if he had a solution for my greenhouse.
The greenhouse is 15’ x 20’ x 8’ with an R value of 3, so keeping it heated to a minimum of 65 degrees
would be a challenge.
Allen invited me to come tour his manufacturing facility. He took the time to explain how his furnace is
different from all other electric furnaces and how that makes them more efficient. He designed and
built a unit specifically to meet my needs and made it easy for me to install myself. This past winter we
had temperatures as low as 6 degrees, and we had no issues in maintaining the 65 degrees temperature
Joe - St. Louis, MO