The Model C-1 Unit Heater is an open flame heater that does not need to be vented. Although it does require a fresh or combustible air intake from the outside of the greenhouse.
The C-1 is round in design-12.5 inches in diameter and 22 inches tall, constructed of non-rusting mill polished aluminum shell supporting a stainless steel burner rated at 20,000 BTU input.

Freight charges from Oklahoma City.

$388.58