Greenhouse: Vented vs. Nonvented heaters, 1 by joannabanana

joannabanana wrote:
Hi everyone,

2 years ago, I bought a Mr. Heater Little Buddy propane heater. It has a pilot light (which burns continuous) and also a low oxygen sensor shutoff that is integral to the pilot light assembly. It worked fine until about 4 o'clock in the morning, when it would go out from the low oxygen (my guess). Since I did not have electricity in the GH, I put an open ended pipe near the heater to allow for constant fresh air. That worked great and did not create a draft.

Since then I got a bigger GH and now have electricity in there. I run an electric heater with a fan (about 3000 BTU) on high behind the propane heater (4000 BTU low or 9000 BTU high). The electric heater/fan keeps the air movement constant and there has been no pilot outage. The electric heat is not enough to heat the 8'X12' GH with low night temps here. I also have 2 circulating fans (electric) above the heaters. This is a huge improvement to evening heat the entire GH

Here's a pic of the small GH with the fresh air pipe