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    Empire GWT35 Gravity-Vented Wall Furnace - Natural Gas - GWT-35NAT

    817.20
    List Price: $1,009.99
    Sale Price: $817.20
    You Save: $192.79 (19%)
    In Stock.
    * Usually Ships within 5-7 Business Days.
    • Efficiently generates 35,000 BTUs of heat
    • Requires no electricity
    • Easily retrofits
    • Can be recessed into wall or mounted flush with a separately purchased Out-of-Wall Installation Kit
    • Millivolt controls
    • Built-in automatic safety shut-off
    • Natural gas and propane models available
    • 10-year warranty for combustion chamber and 1-year limited warranty for parts
    • Dimensions: 66 1/8" H x 16" W x 6" D
    • Minimum Clearances:
      • 12" from top
      • 4" from each side
    See complete product details >>
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    Product Details
    Manufacturer: Empire
    Part Number: GWT35NAT
    eFireplaceStore Item Number: CUI-GWT35NAT
    UPC: 720968283139

    Features

    • Efficiently generates 35,000 BTUs of heat
    • Requires no electricity
    • Easily retrofits
    • Can be recessed into wall or mounted flush with a separately purchased Out-of-Wall Installation Kit
    • Millivolt controls
    • Built-in automatic safety shut-off
    • Natural gas and propane models available
    • 10-year warranty for combustion chamber and 1-year limited warranty for parts
    • Dimensions: 66 1/8" H x 16" W x 6" D
    • Minimum Clearances:
      • 12" from top
      • 4" from each side
      • 1 1/2" from the bottom of the unit to floor covering
    Are you out of space, but need to install a home heater fast? It's time to take a look at the GWT35 Gravity-Vented Wall Furnace from Empire. This superb space saving heater efficiently generates up to 35,000 BTUs of heat. It requires no electricity, easily retrofits, and can be recessed into a wall or mounted flush with a separately purchased kit. Best of all, it measures only 66 1/8" high x 16" W x 6" D. With the proper clearances, this heater is a phenomenal space-saving solution for your heating needs.
    Customers Who Viewed This Item Also Viewed
    Customer Questions & Answers
    12 Questions & 12 Answers
    Darlene
    from Michigan asked:
    December 14, 2016
    Is it safe to use this furnace in the same room where pet birds are kept? Are there any toxic gases or chemicals that could be emitted into the room if the furnace is vented correctly through the roof?
    1 Answers
    If this is vented and installed correctly, there will be no issue. Even if the furnace were not vented correctly, there will be a pressure switch to prevent the spillage of any carbon monoxide.
    Will M.
    on December 15, 2016

    Dave
    from Racine, WI asked:
    March 14, 2016
    If I purchase this furnace, model GWT35 , with an out of wall installation kit, how far will it stick out of the wall? Can I use the automatic shut off as a thermostat? What size of vent do I use for the chimney and is it a round one? Does the vent come out of the back of the unit or the top?
    1 Answers
    With the kit you have purchased, the heater will project into the room equivalent to the depth of the heater, which is 6". You may have to provide clarity for the shut off you are planning to use, but any standard millivolt On/Off thermostat may be used with this heater. This heater uses 4" oval B-venting installed on the top of the heater for vertical venting.
    Will M.
    on March 15, 2016

    Dave
    from Racine, WI asked:
    March 11, 2016
    If I were to purchase the out of wall installation kit with this furnace, how much further would it stick out from the wall? Is it then is vented out of the top - back part of the furnace? What size of vent is used then? The automatic shut off, can that be used as a thermostat?
    1 Answers
    Per the manufacturer, the out of wall kit is 6 5/8 inches deep and allows the heater to be installed completely outside the wall, with the kit simply anchoring to the wall for support. The venting will continue to be routed out of the top of the unit, towards the back. It would have to be encased in a vent chase to hide the pipe. The venting starts as Type B 4 inch ovalized from the top of the unit and can be left as such or adapted to Type B 4 inch round. The unit comes with a basic thermostat for on/off operation.
    eFireplaceStore
    on March 15, 2016

    Louie
    from Pico Rivera, CA asked:
    February 5, 2016
    How do you start the wall furnace manually when the thermostat is not working?
    1 Answers
    You may use a section of jumper wire to jump between the "THTP" and "TH" terminals on the gas valve to test operation of the heater. If this ignites the burner, check your wiring or replace the thermostat. If this does not work, you may want to clean the pilot assembly or adjust the pilot flame to ensure the thermopile is producing enough millivoltage for the valve to allow flow to the burner. If this does not work, either the thermopile will need to be replaced or there is an internal issue with the valve.
    Will M.
    on February 5, 2016

    Terry
    from Glenwood Springs, CO asked:
    July 2, 2014
    I'm interested in replacing an old radiant heat gas furnace, but it's located between two rooms and provides heat in both directions. Do you have anything like that, or could I put two of these furnaces back to back. Radiant would be preferable, but forced air would be adequate.
    1 Answers
    The GWT35 does have the option to add the Rear Register Installation Kit, but this kit provides only about 20% of the heat from the unit to the adjacent room. For a greater distribution of heat, you may prefer the Empire GWT50 Gravity-Vented Dual Wall Furnace as is it capable of easily heating 2 rooms adjacent to one another.
    Chris C.
    on July 2, 2014

    Jon
    from San Diego asked:
    October 7, 2013
    I have a couple of questions. The specs state that the depth is 6 inches. If it is installed recessed in a wall, will the unit only stick out 2 inches? Is there a blower kit? Is there a rear register, and does it have blower as well?
    1 Answers
    In a 2 x 4 wall with standard 1/2 inch drywall, the unit will indeed project by 2 inches into the room. An optional fan, the Empire GWTB2 Automatic Gas Furnace Blower could be used. The unit does indeed also offer a rear register, which is the Empire Furnace Rear Register Installation Kit. There is not a separate blower for the rear register. The unit will rely on passive air circulation for that item.
    Collin C. - NFI Master Hearth Professional
    on October 8, 2013

    Elmer
    from Springer, New Mexico asked:
    September 22, 2013
    My model GWT-35-1 natural gas heater will not light up. The pilot will light but gas won't go on to the furnace. I took the thermostat off and touched both wires, red wire and white wire but no spark (gas will not go on). I checked the outside electrical panel and there are no tripped switches. It has a reset button but I am afraid to push too hard and break it. Can you give me possible problems and how to fix them?
    1 Answers
    This unit is a standing pilot, millivolt style of appliance. This being the case, it generates its own electricity to operate and will not have any outside power to rely on. If the pilot is steady, voltage should be routed to the valve for it to operate. To test operation, first switch the gas valve to the "on" position. Next, use a short section of jumper wire to jump between the "THTP" and "TH" terminals on the gas valve. This should manually active the valve. If the burner does not ignite, there is likely an internal issue with the valve or the pilot is not generating sufficient voltage.
    Collin C. - NFI Master Hearth Professional
    on September 23, 2013

    Connie
    from Laguna Beach, CA asked:
    May 24, 2013
    Does the heater need to be ventilated to outside?
    1 Answers
    Yes, this furnace must utilize Type B gas vent pipe. You can see venting details for this unit starting on page 6 of the owner's manual.
    Tyler M. - NFI Certified Specialist
    on May 24, 2013

    Colette
    from Montreal asked:
    February 20, 2013
    I own a GWT35 natural gas wall furnace. I've had it 8 years and it worked fine. Recently, l had three occurrences of the pilot light just going off leaving me without heat until l realized what had happened. l re-lit the furnace and then it happened again after 5 days. Re-lit and it happened again after 10 days. lt's a good thing l am not going away. l keep the area below the thermostat and pilot clean and there was no draft because all windows and doors are closed. l live in Montreal and temps are well below freezing! What could be the problem? l am worried now when l leave the house that it's going to go off again.
    1 Answers
    Most likely, the thermocouple in the unit is becoming weak or has a buildup of combustion byproduct that is causing it to produce a decreased millivolt output. The thermocouple (probe that the pilot flame heats) can be cleaned to see if that will resolve the issue. With the pilot light off and the unit cool, use a piece of fine grit sandpaper to lightly polish the thermocouple. After years of being engulfed in flame, the probe will become dark and will have a layer of buildup. When the probe appears clean, wipe it down with a damp cloth to remove any residue from the sanding. Allow it to dry and relight the pilot again. If the pilot continues to go out, the thermocouple has simple gotten too weak and will need replacement.
    Collin C. - NFI Master Hearth Professional
    on February 21, 2013

    Jan-Hendrik van Leeuwen
    from Middleburg, VA asked:
    October 11, 2012
    I am considering replacing my kerosene stove with a propane gas heater. I have the following questions regarding the ventilation of the Empire B-Vent Gravity Wall Furnace, model GWT-35: 1. How is this model ventilated; does it require the installation of exhaust pipe(s)? 2. Could this furnace be installed against the chimney that is currently used for ventilating my kerosene stove? 3. If so, could this chimney be used as a duct for the the furnace's exhaust?
    1 Answers
    This furnace features an ovalized 4 inch flue outlet, as it is primarily meant as a wall furnace. This allows the vent piping to be encased in a standard 2 x 4 wall without any clearance issues. An oval-to-round adapter is used to convert the B vent piping from a 4-inch oval back to 4-inch round, after the vent piping has entered the attic. In your scenario, it is certainly possible to install this furnace in front of the existing chimney. You would need to use the "out of wall" furnace kit located on the accessory tab above. You would still need to use an oval to round B vent adapter, then run 4-inch liner venting up your existing chimney. I do not recommend venting the furnace into your chimney without the 4-inch liner. Lack of a liner will cause the furnace to draft poorly and cause poor performance.
    Collin C. - NFI Master Hearth Professional
    on October 12, 2012

    brad hoffman
    from las vegas asked:
    November 15, 2011
    Do you sell the vent to this? It's the type b vent system.
    1 Answers
    We do indeed carry the type b venting for this unit and can assemble a quote for the needed pipe if you like. The unit also requires a type bw adapter to pass the pipe from the stud cavity the unit is mounted into, through the wall header and into the attic.
    Collin C. - NFI Master Hearth Professional
    on November 15, 2011

    Robert Gordon
    from albuquerque NM asked:
    November 15, 2011
    installed 35,000 btu single wall furnace. Works fine, except the pilot goes out after about 24 hours of operation. Vented directly up through flat roof with 9 feet of double wall vent pipe that is used directly from the furnace. Typical rain cap installed. No CO and furnace seems to operate normally except when the pilot goes out. Do you know what the problem is? The venting diagram shows insulated section of vent on roof, and transition to larger pipe. I did not do this. Is this a problem with venting, causing the pilot to go out? The voltage measurements are excellent showing the thermopile is working.
    1 Answers
    Most commonly, a misadjusted thermopile is what causes the pilot to extinguish. As you mention, the voltage reading are within specification, so this would not be the issue. Improper venting can cause this issue, but it is usually not a routine occurrence. The pilot will usually go out at random and not at regular intervals. Please advise if it is going out at exactly 24 hours or if there is a little more variance, say by a couple hours.
    Collin C. - NFI Master Hearth Professional
    on November 15, 2011

    Customer Reviews
    4
    3 Reviews
    5
    33% (1)
    4
    33% (1)
    3
    33% (1)
    2
    0% (0)
    1
    0% (0)
    100% Recommend this product (3 of 3 responses)
    By Jacqueline Thompson from Wyoming on November 1, 2013
    I would recommend this item to a friend.
    Strange Noise
    The heater makes a loud sound when it kicks on and shuts off. It is a very strange cracking noise.
    By Terry Sanchez from Montana on May 1, 2013
    I would recommend this item to a friend.
    A Perfect Fit
    The heater was a perfect fit for the opening I had. My connections were old and had to be upgraded, but the unit is heating well. I did not opt for the blower, since I am only heating a small space.
    By Todd Gonzales from Wyoming on July 18, 2012
    I would recommend this item to a friend.
    Fantastic Heater
    This is a fantastic heater. I am very pleased with my purchase.
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