Model C-1 Non-Vented Greenhouse Unit Heater
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 form the outside of the
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 B.T.U.
In areas where there is heavy snowfall, it is necessary to arrange to keep the ends
of the air intake pipe open. This can be accomplished by tilting something over
the outside opening while the snow is falling.
A 2" to 3" PVC air intake pipe should
be installed as the figure shows. The outside elbow should be turn down to keep
out water and screened to keep out rodents. Intake pipe can be offset to one side.
It does not have to be in center of heater. The pipe extending outside must be no
more than 12" from inside floor grade, and should stop about three inches from the
heater, and about four inches up from the floor.