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Greenhouse Heating Systems

Perhaps no other greenhouse decision will create more anxiety than deciding on your choice of heating system. The fact is, most greenhouses cost less to heat than homeowners expect, and you have several options that will work well. With the rising cost of natural gas and propane, the cost to run gas or electric heaters are about the same. Some things to consider:

Electric heaters are nearly 100% efficient in converting input energy (kilowatts) into heat output. Our compact 240 volt electric heaters operate at lower amperage than 110 volt heaters and are very efficient and reliable.

Gas heaters are only 80% efficient, so you need to figure for extra capacity (BTU output) and order a unit sized accordingly.

Electric heaters do not require any exhaust or air intake flues and can be conveniently located under a potting bench or hanging from a gable endwall.  Most gas heaters require a flue pipe to remove gas exhaust fumes, and an air intake vent to provide fresh oxygen to burn. Both allow cold air to enter your greenhouse and require a 4-6 inch hole through the wall at some location.

BTU Calculator

Sq. Ft. Exposed Surface Area x ( Tmax – Tmin ) ÷ R
Square Feet of Glass or Poly Surface Area x ( Maximum Temperature Inside – Minimum Temperature Outside ) ÷ R-value

R-Values
Glass - Single Pane - 1.0
Polycarbonate - 8mm Twinwall - 1.7
Polycarbonate - 8mm Triplewall - 2.1
Glass - Double Pane - 2.3
Glass - Double Pane Low -E - 4.0

Electric Greenhouse Heaters
34,000 BTU Electric Heater

34,000 BTU Electric HeaterItem GH34K

34,000 BTU Electric Heater; 240V, 43A, 10KW.

These energy-efficient heaters are our first choice for most residential greenhouse applications because they are very reliable and can be conveniently located under a bench at one end of the greenhouse where its heat will rise up through your plants, keeping the roots warm.

240V electric heaters require an external wall-mount thermostat (as below).

$926.00 





25,000 BTU Electric Heater

25,000 BTU Electric HeaterItem GH25K

25,000 BTU Electric Heater; 240V, 31A, 7.5KW.

These energy-efficient heaters are our first choice for most residential greenhouse applications because they are very reliable and can be conveniently located under a bench at one end of the greenhouse where its heat will rise up through your plants, keeping the roots warm.

240V electric heaters require an external wall-mount thermostat (as below).

$839.00 





17,000 BTU Electric Heater

17,000 BTU Electric HeaterItem GH17K

17,000 BTU Electric Heater; 240V, 21A, 5KW.

These energy-efficient heaters are our first choice for most residential greenhouse applications because they are very reliable and can be conveniently located under a bench at one end of the greenhouse where its heat will rise up through your plants, keeping the roots warm.

240V electric heaters require an external wall-mount thermostat (as below).

$569.00 





10,000 BTU Electric Heater

10,000 BTU Electric HeaterItem GH10K

10,000 BTU Electric Heater; 240V, 13A, 3.3KW.

These energy-efficient heaters are our first choice for most residential greenhouse applications because they are very reliable and can be conveniently located under a bench at one end of the greenhouse where its heat will rise up through your plants, keeping the roots warm.

240V electric heaters require an external wall-mount thermostat (as below).

$526.00 





Greenhouse Thermostats
Wall Mount Thermostat Control

Wall Mount Thermostat ControlItem GT110240

Not all thermostats are the same. We recommend only the best quality for reliable operation. These line voltage thermostats are designed for the high humidity environments of a greenhouse.

  • Wall Mount Thermostat Control
  • Waterproof
  • Heating or Cooling
  • single-stage Control
  • 110V or 240V
$69.00 





Gas Greenhouse Heaters
45,000 BTU Gas Heater

45,000 BTU Gas HeaterItem GGH36K

45,000 BTU Modine HD 45

Gas heaters are the most popular style of heating systems for large greenhouses and those where natural gas or propane lines are conveniently accessed.  The Modine units are professional quality and specifically designed for greenhouse applications.  110V electric power and a 3” exhaust ventilation kit (AVAILABLE SEPARATELY BELOW) are required for each unit.  Forced air exhaust allows you to locate the vent horizontally through a sidewall, or vertically through the roof.

Add To Cart and select NATURAL GAS or PROPANE.

$599.00 





30,000 BTU Gas Heater

30,000 BTU Gas HeaterItem GGH24K

30,000 BTU Modine HD 30

Gas heaters are the most popular style of heating systems for large greenhouses and those where natural gas or propane lines are conveniently accessed.  The Modine units are professional quality and specifically designed for greenhouse applications.  110V electric power and a 3” exhaust ventilation kit (AVAILABLE SEPARATELY BELOW) are required for each unit.  Forced air exhaust allows you to locate the vent horizontally through a sidewall, or vertically through the roof.

Add To Cart and select NATURAL GAS or PROPANE.

$575.00 





Ventilation Kit

Ventilation KitItem GHVKit

For Modine gas heaters.  Includes 3” Type B double-wall connector, exhaust pipe (12” long), endcap and clamp for horizontal installation. 90 degree elbows and additional pipe available for vertical installation – call us.

$89.00 





Ventless Gas Greenhouse Heaters
20,000 BTU Southern Burner

20,000 BTU Southern BurnerItem GGH20K

20,000 BTU Southern Burner available for either NATURAL GAS or PROPANE.

This ventless gas heater burns with high efficiency and does not require an exhaust vent (but it does require a source of fresh air intake). The biggest advantage of this style heater is that it does not require electricity. We’ve tested it and this is one of the only only ventless gas heater that works reliably in our greenhouses.

The Southern Burner Greenhouse Heater is a reliable, commercial-quality heater that works well in residential greenhouses. It includes a millivolt control wall-mount thermostat that does not require electricity. A three inch air intake is required (AVAILABLE SEPARATELY; BELOW).

$575.00 





 

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Arcadia GlassHouse LLC
20 Park Road
Painesville, OH  44077
Phone440-357-0022
Fax440-357-5122

arcadia glasshouse greenhouses

ArcadiaGlassHouse.com


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