Internet #312235105

Model #SF1000E

42 in. EPA 2020 Certified Wood Burning Indoor Furnace

Product Overview

The SF1000E enters the market with few competitors as an industry-leading 2020 EPA Certified furnace. Green and efficient, Shelter Furnace has perfected its Whole-Home Heating Solution guarantee by delivering warmer air, cleaner exhaust and longer burn times. Pound for pound, the SF1000E generates the most clean-burning heat per fuel load of wood in the warm air furnace industry today.
  • Longer burn times eliminate worry between loads
  • Whole-home heating delivers uniform warmth
  • Digital thermostat monitors temperature and maintains comfort
  • Heats up to 2,000 sq. ft. comfortably with Clean Burn technology
  • 3.4 cu. ft., stainless steel lined firebox and fixed grate system accept 20 logs
  • Pre-wired, front-mounted draft inducer simplifies installation and makes start up easy
  • Easy-access, slide-in filter keeps blower clean and maximizes distribution air
  • Longer burn times and higher distribution temperature out-perform pre-EPA furnaces
  • Minimized dimensions and improved clearance-to-combustible minimums make it ideal for small spaces and tight installations
  • Optional steel stand (WAF-STAND) makes loading wood easier

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)
Vent diameter (in.)


Annual Fuel Utilization Efficiency (AFUE) (%)
Energy Consumption (kWh/year)
Fuel Gauge
Fuel Tank Capacity (gallons)
Heat Output (BTU/hour)
Heat rating (BTU/hour)
Heating Product Type
Forced Air Furnace
Heating Technology Type
Forced Air
Motor Type
1/3 horsepower / electric
Number of Blower Speeds
Power/Fuel Type
Product Weight (lb.)

Warranty / Certifications

Certifications and Listings
CSA Certified,EPA Approved
Manufacturer Warranty
Firebox - 5 Years, Cast Iron Grate - 5 Years, Blowers - 2 Years, Electrical Components - 1 Year

Questions & Answers


what is the electric power requirement, in amps thanks

Asked by sw November 21, 2020

The sum of all electrical components is 5.45 amps max. This furnace is designed to operate on a standard 15-amp residential electrical outlet.

what is the square footage that this will heat up to

Asked by jeff October 16, 2020

Up to 2,000 sq ft comfortably.

Concerning the existing duck work, how much space between the duck work and rafters would be need...

Asked by Grace October 13, 2020

I have included the clearances to combustibles from the manual Clearances: Unit must be placed on a non-combustible floor. This floor must extend at least 16 inches in front of, and 8 inches on either side of, the fuel loading and ash removal doors; underneath the chimney connector; and 2 inches on either side of the chimney connector. The furnace must maintain the following clearances to combustibles: • Heat plenum = 2 inches • Chimney connector = 18 inches • Front = 48 inches • Rear = 12 inches • Sides = 6 inches • Main furnace = 12 inches For the second answer, the only fan to use with the wood furnace is the one that comes with the unit. When using as a secondary furnace with existing ductwork, use one furnace or the other but not both at the same time.

This is not a 4200 outdoor furnace. The answer to "how much square feet will it heat properly" is...

Asked by Mojo October 10, 2020

I have a 2000 square foot house and it heats it with no problem.

What is the size of the flew coming out of the stove?

Asked by rick October 8, 2020

6 inch.

How long a piece of wood will it take?

Asked by Lowell September 7, 2020

How long a piece of wood will it hold?

Asked by Lowell September 7, 2020

Where is the unit manufactured ? What is the CFM of the blower ?

Asked by Jal September 3, 2020

The furnaces are manufactured in St. Louis, MO. The distribution blower is rated at 1800 cfm. If you have any other questions please do not hesitate to contact our office at 1-800-875-4788. Thank you!

Does or will shelter make a roughly 2500 sq ft indoor add on furnace thats 2020 epa certified?

Asked by Eric August 24, 2020

How much sq ft will it heat properly ?

Asked by Vic July 11, 2020

The Shelter SF 4200 Outdoor Furnace is rated at a maximum heating up to 4000 square feet. This rating is based on a well insulated home with insulated glass and low air leakage. So if the home is older with old windows, air leakage and poor insulation then the furnace might only heat up to approximately 3000 square feet. It all depends on the demand for heat to keep the home warm. Homes with high ceilings over 9 feet generally require more heat and the use of ceiling fans to push the heat down to the floor. Some people with extremely well insulated air tight homes can heat even more then 4000 square feet. Please remember this is a forced air furnace and thus must have the warm air distributed efficiently through out the home to work well. This same air must be able to return to the furnace easily and be heated again and again for the furnace to perform properly. Thank you for your question.

42 in. EPA 2020 Certified Wood Burning Indoor Furnace - page 2

Customer Reviews

  • 2 Customer Reviews
  • 3.5 out of 5 stars overall
0% of customers recommended.
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It was advertised fully assembled, it was not....
It was advertised fully assembled, it was not.
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Although it burns great and heats the house. Cleaning...
Although it burns great and heats the house. Cleaning it out is a challenge. It needs a larger area for ash to go through to make it easier to clean out .
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