In Northern states, it is suggested that one unit heater be placed for every 150 to 175 square feet of floor space in a conventional greenhouse. In Central states, place one unit heater to every 200 square feet of floor space. In the Southern states, we allow as much as 225 square feet to one unit.
(COMPLETE INSTRUCTIONS ARE PACKED WITH EACH HEATER)
Do not overlook the necessity of providing a way for fresh air to enter the greenhouse. This is a 'must' and should not be eliminated. The illustrations below show the proper way to install the air intake pipes for this model. A slight top ventilation is also necessary in the greenhouse to provide for circulation and exhaust. In case of heavy snows, take care not to let the vent pipe get buried as the heaters need oxygen to burn properly.
Southern Burner heaters are equipped with millivolt controls and wall mounted thermostats that require no electricity for operation. Two styles are available: The first being a Single Stage Thermostat that has a temperature range of 35 to 75 degrees. When you select a temperature setting the heater will cycle on and off at this setting. Regardless of the time of day or night.
The Second Style is a Day and Night Set-Back Thermostat This gives you the capability of two separate temperatures one for day and one for night. The thermostat has an adjustable clock that you choose from 15 minute intervals to set the temperature change from day to night settings. The clock Is powered by an "AA" Alkaline battery still giving you the convenience of no electricity. Temperature range Is from 45 to 90 degrees. Mounting of the thermostat can be up to 25 feet from the heater and should be shielded from direct sunlight or water.
Add $100 for Day and Night Set-Back Thermostat.
All controls have a 100% safety cutoff feature. If the pilot flame should go out for any reason, the millivolt control would shut off all gas to the heater. Pilot flame would have to be re-established before heater would operate. Southern Burner heaters are designed to operate under the side benches, installed flush with the front edge of the growing bench or at the end of the isle. Heaters are available for natural or L.P. gas.
WARNING! Heaters on L.P. gas must have a regulator set at II W.C.I. on the L.P. tank.