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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 TF / XF / GF Category 3 Horizontal Vent Kit sterling, tf, xt, beacon, morris, vent, kit, category, horizontal, stainless, steel, flue, exhaust, cat, III, dayton
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Price: $449.00
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Availability: In Stock - Usually ships in 1 to 2 days.
Item #: 4610175 -

    This 5" vent kit is for Sterling TF100, TF125, TF150, TF175, TF200, TF250, XF100, XF125, XF150, XF175, XF200, XF250, GF150, and GF250 models. (Not for use with Sterling XF Concentric Vent Kits)Each vent system comes complete with everything needed to vent the Sterling TF, GF, and XF series heaters. These stainless steel, gas tight vent systems are approved by Sterling for horizontal venting applications for these gas heaters. These are the most durable, longest lasting, and lowest maintenance...

    Modine Heater Air Shutter
    Price: $19.00
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    Availability: In Stock - Usually ships in 1 to 2 days.
    Item #: 4045215 -

      Part # 23 on the Modine Parts DiagramAir Shutters control the gas to air mixture on propane heaters. Modine Part # 3H20634-2 (Works with Modine PD, PDP, PV, PAE, & PA heaters setup for propane)

      Sterling GG Concentric Vent Kit sterling, gg, beacon, morris, concentric, vent, kit, flue, exhaust, separated, combustion, sealed, AS-X7-4, AS-X7-5, ASX7
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      Price: $319 - $419
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      Availability: In Stock - Usually ships in 1 to 2 days.
      Item #: 407090 -

        Sterling GG heaters can be converted to separated combustion when this kit is added to the heater. Separated combustion heaters draw combustion air from outside to ensure that the unit will always have plenty of fresh clean air. The fresh air supply reduces common concerns about dusty, dirty, or high humidity applications. You can also decrease heating costs by as much as 10% because no cold outside air is being sucked into the structure when the heater is running. Pipe must be purchased...

        Stainless Steel Category 3 Wall Thimble Extension
        Price: $29 - $40
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        Availability: In Stock - Usually ships in 1 to 2 days.
        Item #: VN -

          The wall thimble extension is used to add 6” of length to Wall Pass Through and Wall Thimble for thicker walls. What is UL 1738? In short, it is a US standard for gas venting systems required in category 3 applications. Category 3 refers to positive vent pressure which is created by exhaust blowers in unit heaters. These vent systems must be constructed of AL29-4C® stainless steel, contain gaskets for sealing, and have a built in mechanical locking band among other requirements. All category 3...

          Sterling GG Access Panel Gasket
          Price: $32.00
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          Availability: In Stock - Usually ships in 1 to 2 days.
          Item #: 4075135 -

            The Sterling GG access panel gasket is 7' of 5/8" thick foam gasket material that has an aggressive adheasive on the back to adhere to the access panel opening of the GG heaters. Gasket will fit all GG heater models. Recommended if using the GG air inlet collar instead of the concentric vent kit. This already comes with most new Sterling GG heaters. Please check with us if you plan on ordering this with a new GG heater. ...

            Plug-in Power Control Relay power, relay, control, plug, in, 120, volt, ac, dc, 24, v, voltage, sense, sensing, heater, controller, greenhouses, heater, fans
            Price: $24.95
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            Availability: Out of Stock - No ETA
            Item #: 4820835 -

              This handy device allows you to switch devices with low voltage contacts on and off with any of our plug-in controllers. Safe, reliable, power sensing relay monitors AC voltages from 90-140VAC and triggers a relay, but it is more than a relay in a box. Includes a de-bounce circuit and overcurrent breaker for safety and has both normally-open and normally-closed contact for versatility. Comes with 18" power cord with 2 prong plug. Common Use Example You can control a gas heater with 24v or...

              2 Stage RobertShaw Programmable Thermostat thermostat, heating, low, voltage, programmable, digital, thermastat, best, heater, heat, 24, robertshaw, robert, shaw
              Price: $69.95
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              Availability: In Stock - Usually ships in 1 to 2 days.
              Item #: 4820088 -

                The Robertshaw programmable thermostat is specifically made for controlling heaters equipped with 2 stage gas valves. It is easy to program and helps you save money on energy costs by allowing you to set back the temperature during the night or when you’re away. Convenient 5/1/1 and 7 day programming lets you customize your daily schedule based on your needs. Unit also allows an appliance to be cut off when you do not want it to be thermostatically controlled. Features a large easy-to-read LCD...

                Sterling GG Inlet Air Collar
                Price: $57 - $59
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                Availability: In Stock - Usually ships in 1 to 2 days.
                Item #: 407512 -

                  Sterling Inlet air collar and gasket set for GG series heaters. This allows you to connect an air inlet pipe to the Sterling GG heaters without the concentric vent kit. With this setup you will have separate exhaust and intake exit points in your structure. The GG heater access panel gasket is also needed with this setup to provide an airtight seal around the access panel. This comes already installed on most new Sterling GG heaters. Please check with us if you plan on ordering this with a new...

                  Horizontal Pipe Kit for Sterling Concentric Vent sterling, gg, beacon, morris, concentric, vent, kit, flue, exhaust, pipe, horizontal, category, 3, UL, stainless
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                  Price: $265 - $299
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                  Availability: In Stock - Usually ships in 1 to 2 days.
                  Item #: 4610 -

                    These kits include all of the pipe and fittings needed for horizontal venting of the Sterling GG gas heaters equipped with the concentric vent kit (up to a 5' exhaust run).The horizontal pipe kits include: (items in red text shown in picture above) 5' of UL1738 stainless steel exhaust pipe (35" adjustable length pipe + 24" pipe) UL1738 stainless steel heater adapter 4' of interior galvanized intake pipe- 4" for models GG30, GG45, GG60, and GG75- 5" for models GG90, GG105, and GG120 2' of...

                    SureStat TS116 Plug In Portable Thermostat Control thermostat, plug, in, portable, control, heater, fan, greenhouse, garage, shop, room, home, ac, 4820940, 4820945
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                    Retail: $59.95
                    Price: $48.95
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                    Availability: In Stock - Usually ships in 1 to 2 days.
                    Item #: 48209 -

                      This single stage thermostat comes prewired with an 6' grounded Plug-in power cord. Simply plug the thermostat into a standard 110/120 volt outlet. Then plug any 110/120 volt appliance into the outlet on the plug of the thermostat. Select heating thermostat to control a heater or cooling thermostat to control fans and/or louvers. *Plug-in thermostats can not be used with our gas heaters. They require 24 volt thermostats. SureStat Thermostat FeaturesWide temperature range: 30° to 110° FFixed 3...

                      SureStat TS306H Portable Thermostat + Remote Sensor thermostat, water, proof, greenhouse, remote, sensor, surestat, temperature, control, plug, in, portable, heat
                      Retail: $64.95
                      Price: $55.95
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                      Availability: In Stock - Usually ships in 1 to 2 days.
                      Item #: 4820925 -

                        This thermostat comes prewired with a 5' remote sensor and a 6' cord with plug-in. Simply plug the thermostat into a standard 110/120 volt outlet. Then plug any 110/120 volt appliance into the outlet on the plug of the thermostat. This model is only available setup for heating but can be rewired for cooling (see instructions). *Plug-in thermostats can not be used with our gas heaters. They require 24 volt thermostats. Features Widest temperature range: 0° to 120° F 5' waterproof remote sensor...

                        Sterling XF Concentric Vent Kit  sterling, xf, concentric, vent, kit, flue, exhaust, separated, combustion, sealed, X7-H5, X7-H6, X7-V5, X7-V6
                        Free Shipping
                        Price: $375 - $975
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                        Availability: Factory Direct - Usually ships in 3 to 4 weeks.
                        Item #: 40715 -

                          These concentric vent kits for the Sterling XF heaters allow both the air intake and exhaust to vent through the outside wall of your structure with only one hole. Piping must be purchased separately. Concentric kits are available for horizontal or vertical venting. Concentric vent kits include: (shown above) Concentric vent boxInlet air screen or capDeflector discVent capExhaust pipe gasketsHigh-temp silicone Please note: The concentric vent kit does not include any piping. Pipe and fittings...

                          Modine Hot Dawg HD Blower Gasket modine, hd, hot, dawg, blower, gasket, 40152, 4015215, 4015216
                          Price: $29.00
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                          Availability: In Stock - Usually ships in 1 to 2 days.
                          Item #: 40152 -

                            Gaskets for providing a seal between the power exhauster and the heater for Modine Hot Dawg HD heaters. Modine Part # Fits Modine Models 5H74996 HD30AH, HD45AH, HD60AH, HD75AH, HD30AS, HD45AS, HD60AS, HD75AS 5H79794 HD100, HDS100, HD125, HDS125 Item # 40152, 4015215, 4015216 ...