Have a lean-to greenhouse!  They have the advantage of getting some heat from your house in winter, either heat that would be lost, or if it is very cold, you could open windows into the greenhouse to let your house heating system heat it.  Much simpler and less dangerous than any greenhouse heater.  On warm sunny winter days, the greenhouse will actually add heat to your house.  And Humidity.  And Oxygen.

Have a lean-to greenhouse! They have the advantage of getting some heat from your house in winter, either heat that would be lost, or if it is very cold, you could open windows into the greenhouse to let your house heating system heat it. Much simpler and less dangerous than any greenhouse heater. On warm sunny winter days, the greenhouse will actually add heat to your house. And Humidity. And Oxygen.

This cob fireplace-rocket stove, can keep your greenhouse warmer in those cold winter months.

This cob fireplace-rocket stove, can keep your greenhouse warmer in those cold winter months.

DIY Greenhouse Soda Can Solar Heater - Heat up your greenhouse using solar energy and extend your growing season...

DIY Greenhouse Soda Can Solar Heater - Heat up your greenhouse using solar energy and extend your growing season...

Designing a greenhouse?  Use these calculators to choose the best construction material:  Greenhouse Heating Size Calculator, and their Greenhouse Monthly Heating Cost Calculator.

Designing a greenhouse? Use these calculators to choose the best construction material: Greenhouse Heating Size Calculator, and their Greenhouse Monthly Heating Cost Calculator.

greenhouse heaters | Love Apple Farms: Manure Compost as Passive Greenhouse Heating

greenhouse heaters | Love Apple Farms: Manure Compost as Passive Greenhouse Heating

These floor standing Palma Electric stainless steel  heaters are robust, compact and powerful with an output of 2kW and an air circulation rate of 400m3 per hour - stats usually associated with much larger heaters. http://www.harrodhorticultural.com/palma-electric-greenhouse-heaters-pid9175.html Palma Electric Greenhouse Heater - Harrod Horticultural

These floor standing Palma Electric stainless steel heaters are robust, compact and powerful with an output of 2kW and an air circulation rate of 400m3 per hour - stats usually associated with much larger heaters. http://www.harrodhorticultural.com/palma-electric-greenhouse-heaters-pid9175.html Palma Electric Greenhouse Heater - Harrod Horticultural

Keep your greenhouse frost free this winter! These Frosty Greenhouse Heaters from Bio Green are extremely efficient, thermostatically controlled gas heaters for creating the ideal temperature in your greenhouse to grow year round and stop frost damage to plants in winter http://www.harrodhorticultural.com/bio-green-frosty-greenhouse-heaters-pid9170.htmlBio Green Frosty Greenhouse Heaters

Keep your greenhouse frost free this winter! These Frosty Greenhouse Heaters from Bio Green are extremely efficient, thermostatically controlled gas heaters for creating the ideal temperature in your greenhouse to grow year round and stop frost damage to plants in winter http://www.harrodhorticultural.com/bio-green-frosty-greenhouse-heaters-pid9170.htmlBio Green Frosty Greenhouse Heaters

Buy the 1500 Watt Electric Greenhouse Heater Fan on sale now with free shipping, it makes all of the difference for northern gardeners! - Don't let the Winter season slow you down and stop you from gr

Buy the 1500 Watt Electric Greenhouse Heater Fan on sale now with free shipping, it makes all of the difference for northern gardeners! - Don't let the Winter season slow you down and stop you from gr

Greenhouse Heaters - Solar Innovations Solar Innovations

Greenhouse Heaters - Solar Innovations Solar Innovations

Cross Country Arctic 5 Wall Greenhouses (formerly Triplewall) w/ fan 10'8" X 12' 9" $7500 custom-built.  Straight-eave, reg. door.

Cross Country Arctic 5 Wall Greenhouses (formerly Triplewall) w/ fan 10'8" X 12' 9" $7500 custom-built. Straight-eave, reg. door.

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