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Heaters

LB WHITE THERMA GROW HEATERS
DESIGNED SPECIFICALLY FOR GREENHOUSES

Thermagrow Heater

The Therma Grow’s advanced, clean burning design offers 20% better fuel efficiency than traditional vented heaters. The 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. Tthe Therma Grow outperforms even the most advanced competitive products for a lot less money (see table below). Please note: GreenGro Heaters has been discontinued and replaced by Therma Grow Heater

PRICE COMPARISON
Manufacturer LB White Modine Modine
Model Therma Grow Effinity Power Vented
BTU Input 220,000 215,000 200,000
Thermal Efficiency 99.9% 93% 80%
BTU Output 219780 199950 160000
List Price $1239 $4152 $1365
Capital Cost per BTU $0.0006 $0.02 $0.008

For new installations, do it right the first time by installing the Therma Grow series heaters. For existing greenhouses, use your existing heater as a backup and use the Therma Grow heaters as your primary heater. With the redundant heaters, you might be able to save on your crop insurance premium.

Trouble-free Performance Backed by a 10-Year Warranty
With the Therma Grow, fully enclosed electronic controls, gas valve and motor are standard. There's no expensive heat exchanger to fix or replace. Safety features include a totally enclosed flame, built-in temperature protection and air flow safety devices. With heat treated, corrosion resistant components and a heavy gauge steel cabinet, Therma Grow heaters offer a comprehensive one-year product warranty plus a 10- year warranty against heat chamber and case corrosion.

CO2 Enriched Environment
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 (Plants grow bigger). All delivered through an advanced, clean burning design that outperforms all U.S. greenhouse combustion and safety standards for CO, NO2, CO2 and ethylene. As Water vapor is also part of the combustion byproduct, the heat generated is humid heat instead of dry heat as found in vented heaters.

Superior Heat Management
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 and heat management efficiency, including:
■ Two stage temperature control
■ Heating and air circulation modes
■ Tri-Shield triple coated protection against case corrosion

Indoor or Outdoor Installation
The Therma Grow is the only greenhouse heater that offers you the choice of inside or outside installation.
■ Efficient cabinet design offers multiple indoor location options
■ Easy to install outdoor mounting kit saves growing space


Description
List Price
2016
List Price 2015
List Price 2014
List Price 2013
Your Price*
Therma Grow 120 w/ Outside Mounting/Ventilation kit
$1188
$1164
$1,155
$1,291
Call
Therma Grow 120 w/ Inside Mounting/Ventilation Kit
$1540
$1468
$1,458
$1,596
Call
Therma Grow 120 Plus w/ Outside Mounting/Ventilation Kit
$1336
$1310
$1,300
$1,426
Call
Therma Grow 120 Plus w/ Inside Mounting/Ventilation Kit
$1688
$1615
$1,605
$1,731
Call
Therma Grow 220 w/ Outside Mounting/Ventilation kit
$1472
$1443
$1401
$1,662
Call
Therma Grow 220 w/ Inside Mounting/Ventilation Kit
$1804
$1728
$1,716
$1,946
Call
Therma Grow 220 Plus w/ Outside Mounting/Ventilation Kit
$1573
$1542
$1,499
$1,796
Call
Therma Grow 220 Plus w/ Inside Mounting/Ventilation Kit
$1903
$1826
$1,814
$2,080
Call
Add freight cost to total. Add sales tax when shipping to NJ. .

* When paying by Money Order or Check (subject to 5 to 10 business days clearance) or wire transfer (Add $25). Please add Ground Shipping & handling to cost of products. Credit Card Add 3% to total. Inquire for discount schedule on volume purchases. Since we're a high volume distributor, we're passing the savings to you.


Manuals:
Therma Grow 120
Therma Grow 120 Plus
Therma Grow 220
Therma Grow 220 Plus
Therma Grow Ventilation Therma Grow Ventilation

Therma Grow HEATER SPECIFICATION

   

 

    120 or 120 Plus 220 or 220 Plus
Btu/h Rating (Input/Output):      
  Maximum 120,000 220,000
  Intermediate (Plus Models Only) 65,000 120,000
Heater Configuration:      
  Direct Spark Ignition Yes Yes
  Centrifugal Blower Fan Yes Yes
  Air Movement (cfm): 1,100 1,750
Heat / Air Circulation Switch:      
  Therma GrowTM - -
  Therma GrowTM Plus Yes Yes
Inlet Gas Supply Pressure:      
  Propane min./max. (in. w.c.) 11 / 13.5 11 / 13.5
  Natural Gas min./max. (in. w.c.) 7 / 11 7 / 11
Fuel Consumption:      
  Liquid Propane Gas (lbs./hr.) Max / Intermediate 6.8 / 3.0 10.2 / 5.6
  Natural Gas (cu. ft./hr.) Max / Intermediate 117.0 / 63.0 215.0 / 117.0
Electrical Requirements (Volts / Hz / Phase):   115 / 60 / 1 115 / 60 / 1    230 / 60 / 1
  Starting / Continuous Amps 11.8 / 4.5 17 / 7    6.7 / 2.6
Combustion Air Requirements:      
  Indoor Installation (cu. ft./min.) 300 550
  Outdoor Installation(in2 of exit area.) 120 220
Combustion Performance:
US Standards for Heater Discharge;
     
5
CO (ppm rise)  2.5 2.5
0.5
NO2 (ppm rise)  0.3 0.3
4000
CO2 (ppm)  2,000 2,000
0.015
Ethylene (ppm) 0.005 0.005
Air Temperature Rise (0Fahrenheit):   110 120
Minimum Clearance (ft.):      
  Top / Sides / Back 1 / 3 / 3 1 / 3 / 3
  Blower Outlet 6 6
Dimensions (in.): L x W x H   30.75 x 18.25 x 28.25 36.0 x 22.0 x 30.0
Net Weight (lbs.):   116 150
Steel Case Material:                
  Therma GrowTM Galvanized Galvanized
  Therma GrowTMPlus Exclusive Tri-shield coating* Exclusive Tri-shield coating*
Installation Options      
  Indoor or Outdoor Mount Yes Yes
* Tri-shield coating consists of 3 unique protective layers including a non-corrosive hot-dipped galvanized steel, oven-cured epoxy primer and baked, thermosetting polyester.


Ventilation Requirements
All heaters require ventilation for proper operation. The L.B. White Therma Grow is no different. The Therma Grow requires 2.5 CFM per 1000 Btu/h of air exchange. For a Therma Grow 220, this translates to 550 CFM of air exchange for an indoor installation, and 220 square inches of exit area for an outside mount. Similarly, a Therma Grow 120 requires 300 CFM per indoor mount, and 120 square inches of exit area per outdoor mount. To make installation easy, L.B. White offers several preassembled ventilation equipment packages. The following ventilation is required for maximum performance.

Motorized Inlet Shutter
Air Inlet Transition
Exhaust Shutter
Power Exhaust
Motorized Inlet Shutter
Air Inlet Transition
Exhaust Shutter
Power Exhaust

INSTALLATION AND VENTILATION KIT
ITEM DESCRIPTION FAN
DIAMETER
REQ'RD
WALL OPENING
MOTOR
HP
VOLTS/
PHASE
SHIPPING
WEIGHT
25995 Therma Grow 120 INDOOR KIT
Motorized Inlet Shutter
Shuttered Exhaust Fan
Air Inlet Transition Kit
Air Inlet Hood
Eyebolts and Chains

-
-
10"
-
-

-
13.5" x 13.5"
10.25" x 10.25"
-
-

-
1/30 hp
-
-
115V / 1phase
115V / 1phase
-
-

26 lb.

 

 

 

25985 Therma Grow 220 INDOOR KIT
Motorized Inlet Shutter
Shuttered Exhaust Fan
Air Inlet Transition Kit
Air Inlet Hood
Eyebolts and Chains
-
-
10"
-
-
-
15.5" x 15.5"
10.25" x 10.25"
-
-
-
-
1/30 hp
-
-
-
115V / 1phase
115V / 1phase
-
-

27 lb.

 

 

 

24690 Therma Grow 120 OUTDOOR KIT
Exhaust Shutter
Outdoor Mounting Kit
  -
10.5" x 10.5"
   

40 lb.

 

24688 Therma Grow 220 OUTDOOR KIT
Exhaust Shutter
Outdoor Mounting Kit
  -
14.5" x 14.5"
   

50 lb.

 

PROPER INSTALLATION OF VENTILATION KITS
Indoor Ventilation Installation
Outdoor Ventilation Installation
Indoor Ventilation Installation
Outdoor Ventilation Installation


INDOOR MOUNTING TRANSITION KIT

Inlet Mounting Transition Kit

Therma Grow Greenhouse Heater and Accessory Prices

ITEM# DESCRIPTION LIST PRICE YOUR PRICE
TEMPERATURE CONTROL      
09381 Thermostat kit NEMA 4X $71 Call
23778 Thermostat kit, 2 Stage Nema 4X (Use with plus models)* $119 Call



Frequently Asked Questions

1. Why do I need to have the Ventilation kit with the Therma Grow heaters?

All heaters require ventilation to support combustion and for proper operation. In the conventional gravity or power vented heaters, ventilation are built-in to the greenhouse as the heater is using the inside air and of course outside air being drawn inside the greenhouse for combustion and 20% or more of the heat and the product of combustions (CO, CO2, NO2, NOX, ethylene etc) are vented in the atmosphere which results in inefficiency. Also, once the vented heaters are operational, to keep the presure/air balance, cold air is being drawn from any infiltration in the greenhouse further reducing the inefficiency to 65-78% efficiency. In dollar terms, if you're spending $10,000 for the heating season, $6,500 to $7,800 are being spent in heating the plants while $2,200 to $3,500 are being wasted into thin air. Any leaks from the heater to the smoke stack for a vented heater inside the greenhouse would be devastating to the plants. The same can be said of any leaks from either natural gas or propane inside the greenhouse.

For a direct-fired heater like the L.B. White Therma Grow ventilation is no different. The Therma Grow still need air to support combustion, however, since it is direct fired, all the heat and the product of combustion (water vapor, CO,CO2, NO2, NOx, ethylene etc ) are all released directly inside the greenhouse so that no heat is wasted hence the 99.9% efficiency. However, as the Therma Grow heater keeps on running , it uses the air inside the Greenhouse to support combustion but in so doing, without any fresh air/oxygen and exhaust to keep the pressure/air balance, oxygen consumption is is being depleted there would be a build up of combustion byproducts like carbon monoxide and specially ethylene where the plants are sensitive to. Even if the Therma Grow is designed to be 99.9% efficient, there is still the matter of the 0.1% unburned fuel. In order to mitigate the buildup of ethylene and unburned fuel which is damaging to the plants, fresh air intake and to maintain the required air exchange, exhaust are required. The Therma Grow requires 2.5 CFM per 1000 Btu/h of air exchange. For a Therma Grow 220, this translates to 550 CFM of air exchange for an indoor installation, and 220 square inches of exit area for an outside mount.

2. My greenhouse has an existing vented-heater and I plan to use the Therma Grow as my primary heater and the existing heater as a backup. Since my existing heater already has an exhaust stack, do I still need the ventilation kit?

You may think that your 6" to 10" smoke stack is large enough for the exhaust. but if you look at your existing exhaust stack, its connected to the heater, heat exchanger, burner and finally the burner motor. The motor for the burner has some adjustment to calibrate the amount of opening to draw in surrounding air/oxygen with the fuel mixture for optimum combustion. The opening is small and is insufficient for proper exhaust. Therefore, you'd still need the ventilation kit.

3. Do I need to have a permit to install the Heaters ?

A .For new greenhouses, in addition to the building permit, you might as well apply for permits for the installation of heaters, gas tanks, gas lines. Check with your local building officials to the requirements..

4. Can I install the heaters myself ?

A. Its best to have the heaters installed by licensed contractors from mechanical, piping and electrical standpoint. Being professionals, they should be able to comply with all necessary and safe installation in accordance with the latest building code.

5. What do I need for a complete system?

A . Heater, mounting/ventilation kit or email or call sales at 1-908-2084767 for specifics.

6. How long would it take to have my order shipped?

Normally they're stock items and would be shipped the next day. Transit time for ground shipping is another 3 to 5 days. If stock runs out, About 1 to 2 weeks directly from the factory during the off season.

7. What about warranty ?

For Southern Burner: One year manufacturers warranty from date of purchase. Customer to be responsible for shipping to/from factory for parts.

For LB White Products: One-year product manufacturers warranty plus a 10- year warranty against heat chamber and case corrosion from date of purchase. Customer to be responsible for shipping to/from factory for parts.

8. How do I know which size heater and quantity to use?

A . Everything boils down to the size and materials use of your greenhouse, its geographical location, setpoint you'd like to maintain and your dealer would be able to size it for you.

10. When is the best time to purchase and install the heaters.

A The best time to purchase and install the heater/s is just after the heating season. Lead time is much shorter and its more relaxing for the installers.

Do you have any questions that weren't answered here?

Send us some email! We'll be happy to answer any questions you have.

Please inquire for shipping cost.
As a reminder, sales tax will be charged when it is shipped in New Jersey.
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