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Fan Size Calculator Heater Size Calculator Plastic Size Calculator Surface Area Calculators Not sure what size heater you need for your greenhouse kit? Our Greenhouse heater size calculator does all...
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Greenhouse Buying Guide Greenhouse Supplies Guide Grow Light Guide Greenhouse Foundation Guide Greenhouse Supplies Guide Ventilation / Cooling Ventilation is the single most important requirement...
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We are often asked why we don't sell unvented (often referred to as ventless or vent-free) gas heaters. They are cheap. There is no need to for a vent pipe, They are +99% efficient. They produce...


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Sterling XF125 Gas Unit Heater sterling, xf125, tf125, heater, gas, propane, xf, tf, furnace, greenhouse, shop, natural, separated, combustion
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Price: $1,369.00
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Availability: In Stock - Usually ships in 2 to 4 days.

    - Replaces Sterling TF125 and SF125 heaters - The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic...

    Sterling XF100 Gas Unit Heater sterling, xf100, tf100, heater, gas, propane, xf, tf, furnace, greenhouse, shop, natural, separated, combustion
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    Price: $1,299.00
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    Availability: In Stock - Usually ships in 2 to 4 days.

      - Replaces Sterling TF100 and SF100 heaters - The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic...

      Sterling XF200 Gas Unit Heater sterling, xf200, tf200, heater, gas, propane, tf, furnace, greenhouse, shop, natural, dayton, beacon, morris
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      Price: $1,729.00
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      Availability: In Stock - Usually ships in 2 to 4 days.

        - Replaces Sterling TF200 and SF200 heaters - The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic...

        Sterling XF250 Gas Unit Heater sterling, xf250, tf250, heater, gas, propane, tf, xf, furnace, greenhouse, shop, natural, warehouse, beacon, morris
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        Price: $1,889.00
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        (2)
        Availability: In Stock - Usually ships in 2 to 4 days.

          - Replaces Sterling TF250 and SF250 heaters - The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic...

          Sterling XF300 Gas Unit Heater sterling, xf300, tf300, heater, gas, propane, tf, xf, furnace, greenhouse, shop, natural, warehouse, beacon, morris
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          Price: $2,259.00
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          Availability: Factory Direct - Usually ships in 3 to 4 weeks.

            - Replaces Sterling TF300 and SF300 heaters - The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic...

            Sterling XF400 Gas Unit Heater sterling, xf400, tf400, heater, gas, propane, tf, xf, furnace, greenhouse, shop, natural, warehouse, beacon, morris
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            Price: $2,629.00
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            Availability: Factory Direct - Usually ships in 3 to 4 weeks.

              - Replaces Sterling TF400 and SF400 heaters - The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic...

              24v Standing Pilot Gas Valves for Modine Heaters gas, valve, PD, PAE, PA, PV, PDP, modine, part, heater, gas, model, replacement, honeywell, pilot, standing, 4034200, 4034202, 4034203, 4034204
              Price: $159 - $259
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              Availability: In Stock - Usually ships in 1 to 2 days.
              Item #: 403420 -

                These gas valves are used in Modine PD, PAE, and PA 24 volt heaters with standing pilot igniters. Each valve comes setup for natural gas and includes kit to convert to propane. (Not for use with automatic pilot ignition systems) The Honeywell / Resideo 1/2" x 1/2" standing pilot gas valve is for Modine heaters up to 200,000 BTU input. Can be setup for propane or natural gas. It replaces Modine part #s 5H71923, 5H71924, & 5H73118-1. The Honeywell / Resideo 1/2" x 3/4" standing pilot gas valve...

                Sterling Heater Control Board J28R06881, part, heater, gas, board, control, spark, ignition, sterling, beacon, morris, dayton, circuit, 11J28R06881, terminal
                Price: $235.00
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                Availability: In Stock - Usually ships in 1 to 2 days.
                Item #: 4075120 -

                  Sterling part # J28R06881 (11J28R06881, 11J28-06881). Direct spark ignition board for Sterling & Beacon Morris gas heaters. This is the newest model which comes with the remote LED diagnostic light. Used On The Following Model Numbers: (Direct spark only)TF030, TF045, TF060, TF075, TF090, TF100, TF125, TF150, TF175, TF200, TF250, TF300, TF350, TF400, RF030, RF045, RF060, RF075, RF090, SF030, SF045, SF060, SF075, GG030, GG045, GG060, GG075, GG090, GG105, GG120, SF100, SF125, SF150, SF175,...

                  Sterling TF / XF Spark Ignitor sterling, heater, gas, tf, xf, spark, igniter, ignitor, part, J38R06891-001
                  Price: $69.00
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                  Availability: In Stock - Usually ships in 1 to 2 days.
                  Item #: 4075465 -

                    Sterling part # J38R06891-001. Spark ignitor for Sterling TF, GF & XF gas heaters. The angled ignitor probe measures 0.875 inches, and the straight rod measures 1.375 inches. Used On The Following Model Numbers:TF100, TF125, TF150, TF175, TF200, TF250, TF300, TF350, TF400, BTU100, BTU125, BTU150, BTU150, BTU175, BTU200, BTU250, BTU300, BTU350, BTU400, XF100, XF125, XF150, XF175, XF200, XF250, XF300, XF350, XF400, GF150, GF250, GF400

                    Sterling GG Heater Conversion Kits sterling, GG, heater, conversion, kit, gas, propane, natural gas, dayton, beacon, morris, BRT
                    Price: $59.00
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                    Availability: In Stock - Usually ships in 1 to 2 days.
                    Item #: 40752 -

                      These kits include all parts needed to convert Sterling GG heaters & Beacon Morris BRT heaters either from propane (LP) to natural gas (NG) or vice versa. Kits include everything needed to convert the heater including the burner ofirice, spring kit for gas valve, instructions, and conversion labels. Sterling Model # Part # for Conv. to Natural Gas Part # for Conv. to Propane GG30, BRT30 11CKPTNDS030-38 11CKNTPDS030-52 GG45, BRT45 11CKPTNDS045-31 11CKNTPDS045-48 GG60, BRT60 11CKPTNDS060-27...

                      120v Standing Pilot Gas Valve for Modine Heaters modine, hot, dawg, hd, dog, part, gas, valve, standing, pilot, 120, volt, line, voltage, control
                      Price: $229.00
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                      Availability: In Stock - Usually ships in 1 to 2 days.
                      Item #: 4034212 -

                        This is a replacement valve used in Modine PA (and earlier) standing pilot heaters that have 120 volt controls (Pre 1980 models). Each valve comes setup for natural gas and includes kit to convert to propane. This is a RobertShaw gas valve with 3/4" x 3/4" openings and comes with 1/2" reducers bushings for the inlet and outlet so it can be used with any size unit. (Not for use with automatic pilot ignition systems)

                        Sterling GG Heater Flame Rollout Switch sterling, heater, part, flame, rollout, switch, gg, gas, beacon, morris, brt, furnace, replacement, J11R04849-003
                        Price: $57.00
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                        Availability: In Stock - Usually ships in 1 to 2 days.
                        Item #: 4075305 -

                          Sterling part # 11J11R04849-003 or J11R04849-003. Manual flame rollout safety switch for Sterling GG heaters. Used On The Following Model Numbers:GG030, GG045, GG060, GG075, GG090, GG105, GG120

                          Sterling GG & TF Heater Pressure Switches sterling, heater, part, tf, gg, xf, gas, pressure, switch, 4075345, 4075347, 4075349
                          Price: $149.00
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                          Availability: In Stock - Usually ships in 1 to 2 days.
                          Item #: 4 -

                            All stocked Sterling pressure switches are listed below. Both standard and high altitude models are available. Sterling Part # Fits Sterling Models (Below 5000' Elevation) J11R06779-00111J11R06779-001 GG30, GG45, TF30, TF45, TF60, TF75, TF100, TF125, TF150, TF300, TF350, TF400, RF30, RF45, RF60, RF75, SF30, SF45, SF60, SF75, BRT30, BRT45, BRU30, BRU45, BRU60, BRU75, BTU30, BTU45, BTU60, BTU75, BTU100, BTU125, BTU150, BTU300, BTU350, BTU400 J11R06780-00811J11R06780-008 GG60, GG75, BRT60, BRT75...

                            White Rodgers Low Voltage Heating Thermostat heater, thermostat, low, voltage, 24, millivolt, gas, Lux, mechanical, control, modine, sterling, williams
                            Price: $25.95
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                            Availability: In Stock - Usually ships in 1 to 2 days.
                            Item #: 4820083 -

                              This simple heating thermostat can be used with any of the gas heaters that we offer. A useful feature in the summer and winter. Thermostat has a temperature range of 50° to 90° F, a separate thermometer display for determining room temperature, and requires wiring. Thermostat Features 50° to 90° F temperature rangeDisplays room temperatureFor use with 24 volt or millivolt single stage heaters

                              Sterling TF, GF, & XF Heater Conversion Kits sterling, tx, xf, heater, conversion, kit, gas, propane, natural gas, dayton, beacon, morris, 4075429, 4075430, 4075431, 4075432
                              Price: $89.00
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                              (1)
                              Availability: In Stock - Usually ships in 1 to 2 days.
                              Item #: 40754 -

                                These kits include all parts needed to convert Dayton & Sterling TF and XF heaters (hot surface and direct spark) either from propane (LP) to natural gas (NG) or vice versa. Kits include everything needed to convert the heater including the burner orifices, spring kit for gas valve, instructions, pilot orifice (if needed), and conversion labels. Sterling Part # Fits Heater Models 261R04867 TF100, TF125, TF150, TF175, TF200, TF250, TF300, TF350, TF400, 4LX52, 4LX54, 4LX56, 4LX58, 4LX60, 4LX62,...

                                Sterling Heater Fan Motor fan, motor, sterling, heater, gas, replacement, part, beacon, morris, propeller, blower, 4075330, 4075335, 4075340, 4075535, 4075540, 4075542
                                Price: $154 - $399
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                                Availability: In Stock - Usually ships in 1 to 2 days.
                                Item #: 4075 -

                                  All stocked Sterling fan / blower motors are listed below. They are all 120v motors. Fan motors only come with what is shown in the picture. Sterling Part # Fits Sterling Models J31R0476611J31R04766 GG30, GG45, TF30, TF45, RF30, RF45, SF30, SF45, BRT30, BRT45, BRU30, BRU45, BTU30, BTU45 J31R0409111J31R04091 GG60, GG75, TF60, TF75, RF60, RF75, SF60, SF75, BRT60, BRT75, BRU60, BRU75, BTU60, BTU75, QVF100 J31R04092-00211J31R04092-002 GG90, GG105, GG120, TF90, TF100, RF90, SF90, BRT90, BRT105,...

                                  Sterling TF / XF Heater High Limit Switch  sterling, heater, gas, tf, btu, high, limit switch, auto, overheat, reset, part, beacon, morris, J11R00306-002
                                  Price: $72.00
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                                  Availability: In Stock - Usually ships in 1 to 2 days.
                                  Item #: 4075570 -

                                    Sterling part # J11R00306-002. High limit overheat switch for Sterling & Beacon Morris gas heaters. Used On The Following Model Numbers:TF100, TF125, TF150, TF175, TF200, TF250, TF300, TF350, TF400, BTU100, BTU125, BTU150, BTU150, BTU175, BTU200, BTU250, BTU300, BTU350, BTU400, QVF100, QVF125, QVF150, QVF175, QVF200, QVF250, QVF300, QVF350, QVF400, QVSF100, QVSF125, QVSF150, QVSF175, QVSF200, QVSF250, XF100, XF125, XF150, XF175, XF200, XF250, XF300, XF350, XF400

                                    Sterling GG Spark Ignitor    sterling, heater, gas, part, spark, gg, ignitor, igniter, J38R06891-003, beacon, morris, dayton
                                    Price: $69.00
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                                    Availability: In Stock - Usually ships in 1 to 2 days.
                                    Item #: 4075325 -

                                      Sterling part # J38R06891-003. Spark ignitor for Sterling GG gas heaters. The angled ignitor probe measures 1.25 inches, and the straight rod measures 1.75 inches. Used On The Following Model Numbers:GG30, GG45, GG60, GG75, GG90, GG105, GG120, BRT30, BRT45, BRT60, BRT75, BRT90, BRT105, BRT120

                                      Sterling GG Propeller Fan Blades sterling, heater, part, gg, gas, fan, blade, 4075370, 4075371, 4075372, 4075373, 4075374, 4075375, 4075376
                                      Price: $69 - $135
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                                      Availability: In Stock - Usually ships in 1 to 2 days.
                                      Item #: 407537 -

                                        All Sterling GG gas heater replacement fan blades are listed below. Fan blade includes locking bolt. Sterling Part # Fits Sterling Models J34R06999-01611J34R06999-016 GG30, BRT30 J34R06999-01711J34R06999-017 GG45, BRT45 J34R06999-00611J34R06999-006 GG60, BRT60 J34R06999-00711J34R06999-007 GG75, BRT75 J34R06999-11411J34R06999-114 GG90, BRT90 J34R06999-11511J34R06999-115 GG105, BRT105 J34R06999-10311J34R06999-103 GG120, BRT120 Item # 407537, 4075370, 4075371, 4075372, 4075373, 4075374, 4075375,...

                                        Sterling GG Heater High Limit Switch sterling, heater, gas, gg, brt, high, limit switch, auto, overheat, reset, part, beacon, morris, 4075318, 4075320
                                        Price: $72.00
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                                        Availability: In Stock - Usually ships in 1 to 2 days.
                                        Item #: 40753 -

                                          Sterling GG high limit switch replacement parts. Sterling Part # Fits Sterling Models J11R08365-002 GG30, GG45, BRT30, BRT45 J11R08365-001 GG60, GG75, GG90, GG105, GG120, BRT60, BRT75, BRT90, BRT105, BRT120 Item # 40753, 4075318, 4075320 ...

                                          Sterling Fan Guard & Motor Mount Hardware Kit
                                          Price: $79.00
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                                          Availability: In Stock - Usually ships in 1 to 2 days.
                                          Item #: 4075580 -

                                            This is a replacement fan guard and motor mount hardware kit for Sterling gas heaters and includes: 4 rubber isolators, 8 washers, 4 bolts and 4 lock nuts. Used On The Following Model Numbers:GG60, GG75, GG90, GG105, GG120, TF100, TF125, TF150, TF175, TF200, TF250, TF300, TF350, TF400, XF100, XF125, XF150, XF175, XF200, XF250, XF300, XF350, XF400

                                            Williams Model 2303 Blower for DV14 Heater
                                            Price: $229.00
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                                            Availability: In Stock - Usually ships in 1 to 2 days.
                                            Item #: 4100150 -

                                              Blower for Williams 14,000 BTU heaterThis 125 CFM blower is a recommended option which directs the hot air coming out of the top of the heater downward where you need it. It can be added at any time. Includes prewired 6 ft. power cord. Requires 110/120v electricity. Does not impede heater from running when power is off. This blower sits on top of the heater and has an On/Auto/Off switch. Dimensions: 18" x 3.5" x 4.5" Setting FunctionsON - blower stays on continuouslyAUTO - blower comes on when...

                                              Williams Model 2302 Blower for DV22 & DV30 Heaters
                                              Price: $239.00
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                                              Availability: In Stock - Usually ships in 1 to 2 days.
                                              Item #: 4100155 -

                                                Blower for Williams 22,000 & 30,000 BTU heatersThis 135 CFM blower is a recommended option which directs the hot air coming out of the top of the heater downward where you need it. It can be added at any time. Includes prewired 6 ft. power cord. Requires 110/120v electricity. Does not impede heater from running when power is off. This blower mounts inside the heater cover and has an On/Off switch with pull chain and adjustable thermostat. Thermostat range is 90° to 130°. ...

                                                Williams Thin Wall Collar  williams, heater, thin, wall, collar, kit, dv, furnace, 9307, direct, vent, wall, mount
                                                Price: $45.00
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                                                Availability: In Stock - Usually ships in 1 to 2 days.
                                                Item #: 4100160 -

                                                  This kit extends the vent cap away from the exterior wall which is needed when mounting the vent cap to vinyl siding or greenhouse coverings to prevent heated exhaust air from damaging those materials. The thin-wall collar is also used needed when venting through walls less than 4 1/2" thick. Williams Thin Wall Collar Installation Manual ...