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 Therma Grow’s patent-pending design combines advanced performance and superior fuel efficiency to reduce energy costs and grow profits. Unlike conventional vented heaters that exhaust 20% of heated air straight out the stack, the Therma Grow converts 99+% of its fuel into clean heat energy. So you get more
heated air into the house per fuel dollar.
Whether you are comparing thermal conversion or seasonal (year-round) efficiency, the Therma Grow outperforms even the most advanced competitive products for a lot less money. |
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Offered in both 220,000 and 120,000 Btu/h propane or natural gas models, all Therma Grow heaters include:
- Dependable, fuel efficient spark ignition
- Quick response on-demand heat
- Powerful long reaching blower fan
- Easy integration with building controls
Therma Grow Plus models offer several additional features for even greater fuel efficiency, including:
- Two-stage temperature control
- Heating and air circulation modes
- Tri-Shield triple coated protection against case corrosion
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The Therma Grow not only saves you money on heating costs; it also delivers all the benefits of a highly efficient CO2 generator, providing 1250 ppm concentration in only 15 minutes of full output.
The Therma Grow is the only greenhouse heater that offers you the choice of inside or outside installation. Optional, easy-to-install indoor and outdoor mounting kits save you time and growing space.
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300 cfm |
550 cfm |
120 sq. in. |
220 sq. in. |
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| Therma Grow 120 LP Heater |
120,000 |
FUR3100 |
$932 |
| Therma Grow 120 Natural Gas Heater |
120,000 |
FUR3101 |
$932 |
| Therma Grow 220 LP Heater |
220,000 |
FUR3102 |
$1,244 |
| Therma Grow 220 Natural Gas Heater |
220,000 |
FUR3103 |
$1,244 |
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| Therma Grow 120 Plus LP Heater |
120,000 |
FUR3104 |
$1,056 |
| Therma Grow 120 Plus Natural Gas Heater |
120,000 |
FUR3105 |
$1,056 |
| Therma Grow 220 Plus LP Heater |
220,000 |
FUR3106 |
$1,367 |
| Therma Grow 220 Plus Natural Gas Heater |
220,000 |
FUR3107 |
$1,367 |
| FOB Castle Rock, MN |
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Indoor Install Kit includes motorized inlet shutter, exhaust fan with shutter, eyebolts and chains.
Outdoor Install Kit includes exhaust shutter and outdoor mounting kit. |
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| Therma Grow 120 Indoor Install Kit |
FUR3108 |
$430 |
| Therma Grow 220 Indoor Install Kit |
FUR3109 |
$512 |
| Therma Grow 120 Outdoor Install Kit |
FUR3110 |
$210 |
| Therma Grow 220 Outdoor Install Kit |
FUR3111 |
$231 |
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| Thermostat Kit |
FUR3112 |
$43 |
| Two-stage Thermostat Kit |
FUR3113 |
$100 |
| LP Gas Regulator |
FUR3114 |
$41 |
| Natural Gas Regulator |
FUR3115 |
$65 |
| 1/2" x 10' Gas Hose |
FUR3116 |
$27 |
| Piping Hardware |
FUR3117 |
$12 |
| FOB Castle Rock, MN |
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You will need the free Adobe Acrobat Reader to view these files.
Therma Grow 120/120 Plus Installation Instructions (PDF, 401K)
Therma Grow 220/220 Plus Installation Instructions (PDF, 440K)
Therma Grow is a trademark of L.B. White Co. |
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