Model # W8M100-317

Internet #202771081

Store SO SKU #1000801136

Winchester 100,000 BTU 80% Multi-Positional Gas Furnace


100,000 BTU 80% Multi-Positional Gas Furnace

  • 100,000 BTU natural gas, maintenance free, electronic ignition
  • Product sold without installation or permitting
  • Equipment should be sized/installed by a qualified professional
$112050 /each
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Product Overview

This furnace is Ideal for new or replacement residential or commercial installations. The W8M Series 80% efficiency multi-positional gas furnaces have a 33 in. tall cabinet and are designed for installation in up-flow, down-flow, and horizontal applications. These single stage furnaces are natural gas ready and convertible to proane (LP Gas) with the optional LP 347 conversion kit. The furnaces are factory shipped for installation in up-flow and horizontal applications and can be easily converted for down-flow applications. All units are classified for Category I venting and may be common vented with another gas appliance as allowed by the National Fuel Gas Code. Features an electronic hot surface igniter for increased safety and efficiency, and adjustable speed maintenance free direct drive blower that never needs lubrication, and self diagnostic control module to monitor operation. The heat exchanger is constructed of tubular aluminized steel. Units are factory assembled, wired and tested to assure safe dependable and economic installation and operation. Requires 1/2 in. input to gas valve, dedicated circuit breaker, and 120V wiring with proper polarity and ground.

  • Natural gas ready and may be converted to LP gas with optional conversions kit
  • Multi-positional design with compact cabinet height of 33 in. for flexible installation
  • Electronic hot surface ignition for increased efficiency and safety
  • Maintenance-free, multi-speed, permanently lubricated direct-drive blower motor
  • Built-in, high level self diagnostics with fault code displays standard on integrated control module for reliable operation
  • Equipment should be sized, selected and installed by a qualified professional to ensure proper installation, safe operation, adherence to federal, state and local codes and for valid warranty; see installation guide for more details
  • Professional installation recommended
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Info & Guides

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Name 80,000 BTU 80% Multi-Positional Gas Furnace 100,000 BTU 80% Multi-Positional Gas Furnace 60,000 BTU 95.5% Multi-Positional Gas Furnace 100,000 BTU 95.5% Multi-Positional Gas Furnace
Brand Winchester Winchester Winchester Winchester
Ratings (3) (2) (6) (5)
Annual Fuel Utilization Efficiency (AFUE) (%) 80.0 80.0 95.5 95.5
Heat rating (BTU/hour) 64000.0 80000.0 57000.0 95000.0
Power/Fuel Type Natural Gas Natural Gas Natural Gas Natural Gas
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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Annual Fuel Utilization Efficiency (AFUE) (%)
Energy Consumption (kWh/year)
Fuel Gauge
Gas or Electric
Heat rating (BTU/hour)
Heating Product Type
Forced Air Furnace
Heating Technology Type
Number of Blower Speeds
4 or More
Power/Fuel Type
Natural Gas
Product Weight (lb.)

Warranty / Certifications

Certifications and Listings
CSA Listed
Manufacturer Warranty
5 Years - Limited on parts / 20 Year - Limited on heat exchanger

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Customer Questions & Answers

is te warranty void if installed by a non licensed individual?

i am looking into replacing my furnace and i am a hard core diyer and i love to save money. i was wondering if the warranty is void if i install it or not.
Asked by: brian
I would say the "warranty is NOT void" if you install it yourself. Providing you can describe yourself as a "qualified" installer. If you have enough savvy to install this heater and can be prepared to verbally and intelligently describe your installation activity, then you are a 'qualified" installer. It does not say "licensed" installer. If you know the local codes, and they can be looked up, that apply and know how to install it, I would say the warranty must hold up. If you are a 'sometime' DIY person and would have trouble navigating through the installation 'as you go', then perhaps you would not be qualified. I have the feeling there may be a law that PROHIBITS the manufacturer from voiding the warranty if the unit is installed by a 'non-licensed' person. The manufacturer is not in the business of voiding warranties based on the persons who install it, providing they can defend their position as "qualified". I'd say I'm qualified to install my dishwasher, stove, and other appliances, and I have done just that. If I sat down and looked over the codes and installation instructions of the heater, perhaps I'd feel I was a qualified person to do that also. That's my story and I'm sticking to it.
Answered by: steve
Date published: 2016-09-13

can it go to propane

can this furnace be converted to bottled propane
Asked by: ubninny
The W8M Series furnace can be installed in upflow or horizontal applications and can be easily converted for downflow applications. The compact cabinet height of only 33 makes the unit perfect for basements, closets, attics, garages and commercial applications. Furnace ships natural gas ready and can be easily converted to use propane gas with the optional LP347 conversion kit. above data taken from full description of t his heater on another website
Answered by: steve
Date published: 2015-11-18

What is the demintions?

What is the demintions?
Asked by: Sam
The height is 33 inches, the depth is 29.5 inches and the width is 17.5 inches.
Answered by: CommunityAnswer
Date published: 2016-11-03

CFM output Not Listed.

I see that the fan/blower has four speeds. Need to know if adjusted by the installer at the motor or adjusts itself automatically by the demand. Critical to know the CFM (Cubic Feet Minute) output to properly size the ductwork. Especially the max output of the fan/blower on all BTU sizes of your company's furnaces, as not listed in specifications. I need at least 1800 CFM for my project. Please have engineer/tech answer and explain. Thanks in advance. PS: Installer can find "Duct sizing" reference in search of www. duct sizing. or waptac duct sizing. Use dampers where needed.
Asked by: Navair81
We agree that the CFM is very important will suggest that the retailer publish this as a required attribute. Not only is this critical for the duct work design, but for matching to A/C applications as well. The model you are asking about has a blower motor with 4 easily adjustable speeds, but a maximum of 1200 CFM. A better match, providing you are using the furnace in an upflow or horizontal application would be: Model KG7SA108C-35C Internet #206511953, which can deliver up to 2000 CFM, and the blower speed can be adjusted easily on the control board. Here is the link to the specification sheet: Contact us at 800-879-0123 should you need additional information or assistance.
Answered by: HHP Tech Support
Date published: 2016-09-08
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Customer Reviews

100,000 BTU 80% Multi-Positional Gas Furnace is rated 4.5 out of 5 by 2.
Rated 4 out of 5 by from Good ... Good
Date published: 2017-04-26
Rated 5 out of 5 by from Great for the price and works great as well. The furnace was easy to install even for me with no experience. if you can install a water heater, dish washer or any similar household appliance then you can install this furnace. My family moved into our house 3years ago and with the harsh winters and older furnace the house took forever to warm up, with the new furniture it raised the temperature 4 degrees in less than 20 minutes. It runs much quieter than I thought possible. I'm no longer dreading the coming winter.
Date published: 2014-10-28
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