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Top-quality Lb ® Therma Grow™ Greenhouse Heater - 220+ Natural Gas - Going Fast [ZCRx4v87]

$55.99 $179.99 -69%

This Natural Gas LB White Therma Grow 220+ Greenhouse Heater utilizes the exclusive LB White Plant-Safe Technology™, making it the only greenhouse heater certified to the stringent greenhouse emissions standards. This plus model offers greater heat m

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Top-quality Lb ® Therma Grow™ Greenhouse Heater - 220+ Natural Gas - Going Fast [ZCRx4v87]

This Natural Gas LB White Therma Grow 220+ Greenhouse Heater utilizes the exclusive LB White Plant-Safe Technology™, making it the only greenhouse heater certified to the stringent greenhouse emissions standards. This plus model offers greater heat management and features a 2-stage temperature control, as well as heating and air circulation modes. They offer 20% better fuel efficiency than traditional heaters.

Therma Grow heaters carry a 10-year manufacturer warranty on the heat chamber and case, and have completely enclosed and protected components, making for years of trouble-free heating. The design combines efficiency, advanced performance, and long component life to reduce energy and maintenance costs, and help grow profits. These units can be mounted either inside or outside; giving growers flexibility and the ability to free up grow space.

Features

  • 99.7% fuel efficient, direct fire technology
  • Dependable hot surface ignition
  • Non-certified CO2 generator
  • Enclosed flame, controls, & gas valve
  • Mount indoors or outdoors
  • Quick response, on-demand heat
  • Easy integration with building controls
  • Hot surface ignition standard
  • Centrifugal blower standard
  • Heating & air circulation modes
  • 2-stage temperature control

Specifications

  120 LP
QC Part #21350
120 NG
QC Part #21351
120+ LP
QC Part #21352
120+ NG
QC Part #21353
220 LP
QC Part #21354
220 NG
QC Part #21355
220+ LP
QC Part #21356
220+ NG
QC Part #21357
BTU/hr Rating 120,000 120,000 65,000 & 120,000 65,000 & 120,000 220,000 220,000 120,000 & 220,000 120,000 & 220,000
Air Movement 1,100 CFM 1,750 CFM
Heat/Air
Circulation Switch
No Yes No Yes
Inlet Gas Supply Pressure
Propane min/max 11 w.c./13.5 w.c.
Natural Gas min/max 7 w.c./11 w.c.
Fuel Consumption (Max)
Natural Gas 120.0 cu.ft./hr 63.0/120.0 cu.ft./hr 220.0 cu.ft./hr 117.0/220.0 cu.ft./hr
LP Gas 5.6 lbs/hr 5.6 lbs/hr 3.0/5.6 lbs/hr 3.0/5.6 lbs/hr 10.2 lbs/hr 10.2 lbs/hr 5.6/10.2 lbs/hr 5.6/10.2 lbs/hr
Volts 115 115/230*
Hz 60
Phase 1
Starting/Continuous Amps 11.8/4.5 17/8.4 or 6.7/2.6
Combustion Air Requirements/Indoor Installation 300 cu.ft./min 550 cu.ft./min
Combustion Air Requirements/
Outdoor Installation
120 in2 of exit area 220 in2 of exit area
Min Clearance Top/Sides/Back 1'/1'/1'
Min Clearance Blower Outlet 6'
Dimensions 30.75" L x 21" W x 28.25" H 35.5" W x 25.5" W x 30" H
Shipping Weight 116 lbs 165 lbs
Steel Case Materials Galvanized White Tri-Shield** Galvanized White Tri-Shield**
*Specify which voltage when ordering Therma Grow 220 units
**Tri-shield coating consists of 3 unique protective layers - a non-corrosive hot-dipped galvanized steel, an oven-cured epoxy primer & a baked, thermsetting polyester

High Elevation models available, please specify elevation when ordering.

What Our Customers Say

January 17, 2026

Absolutely no complaints!

Very happy with my purchase. Thanks.

- Joanne J..

January 17, 2026

Absolutely no complaints!

I'm so happy with this buy.

- Wanda J..

January 17, 2026

Absolutely no complaints!

A great product. Works perfectly.

- Stacy P..

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