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Model # 3003622

Internet # 100084617

Store SKU # 584160

30,000 BTU/Hr Direct-Vent Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat

This item has been discontinued.
The Home Depot no longer carries this specific product.

$745.80 /each
  • Thermostat may be mounted on the wall or on the furnace cabinet
  • Heavy-duty cast-iron burner requires no electricity for operation
  • Matchless pilot igniter for safe use




Model # 3003622

Internet # 100084617

Store SKU # 584160

Store SO SKU # 860980

The Williams Furnace Co. 30,000 BTU Natural Gas Direct-Vent Garage Wall Furnace will continue to produce heat during a power outage as it requires no electricity to operate. This wall furnace is ideal for garages and workshops as it features a sealed combustion chamber which uses no room air for operation.

  • 30,000 BTUs for powerful heating
  • Converts to propane with the optional conversion kit (not included) so you can choose the fuel type that fits your needs
  • Durable ceramic-coated combustion chamber for increased efficiency
  • Rated for elevations up to 4,500 ft.
  • Vent cap equipped with built-in bird guard
  • Attractive, soft-white finish
  • Heavy-duty, cast-iron burner
  • Sealed combustion uses no room air for operation
  • Great for use in garages
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Accessories Included 
Automatic shutoff 
Color Family 
Fuel Gauge 
Fuel Type 
Heat rating (BTU/hour) 
Heater Type 
Heating Product Type 
Gas Wall Heater 
Heating Technology Type 
Ignition Type 
Recessed/Surface Mounted 
Power/Fuel Type 
Natural Gas 
Product Weight (lb.) 
100 lb 
Remote Control 
Room Size (sq. ft.) 
Greater than 900 
Timer Included 
Warranty / Certifications
Certifications and Listings 
CSA Listed 
Manufacturer Warranty 
Refer to Williams' Limited Warranty for warranty information 


Rated 4.5 out of 5 by 117 reviewers.
Rated 5.0 out of 5.0 by Great Heater This was easy to install. A bit time consuming if you you're paying attention to detail, but I was able to install in an afternoon, assuming the gas line has already been run. The instructions are few, but there doesn't need to be many. A full size "cut hole here" template is included. It attaches directly to the studs with 4 screws. The included screws are flat blade, oval head, wood screws - should be drilled first. I used my own screws. I'm heating 1000 s.f. with lots of windows. Temps have been 0 degF at night, highs of about 10 degF, and it keeps it 70 degF in most of the house. Only exception is the opposite end of the house, with an un-insulated room. At these temperatures, it does run quite a bit. It's not the most efficient thing, but considering the low purchase price and installing it myself, it really doesn't matter. With the cold weather we've been having, it looks like it's going to cost about $75 per month in gas. Beats hauling in wood every weekend - or cutting wood to begin with, for that matter. January 10, 2015
Rated 5.0 out of 5.0 by Easy Install and work's perfectly! Easy to install and heats great! Very Economical and easy to use! February 22, 2015
Rated 5.0 out of 5.0 by This heater is very well built and a great buy I bought this to put in a rental house that we remodeled. Home Depot delivered it directly to my location. It came with a full size cutting pattern to cut through the wall. We installed it in two hours and it works great in the one bedroom cabin we put it in. I am very happy with this heater. I looked at others and this one had the best price and value. December 10, 2013
Rated 5.0 out of 5.0 by Great price and great company We bought this wall furnace to heat our 900 sq ft cabin. We have R21 in the walls and R30 in the ceiling, no insulation in the floor currently. We installed it last week, and our low last night was 11 degrees Fahrenheit. We set the temperature to 55 and the furnace had no problem keeping it there all night. When we tried to raise it to 70 though, it only could maintain about 65. When we insulate the floor and fix leaky windows and door, we figure it should maintain through our worst days and keep us comfortable. We had wire that we could use in place of the 16 feet of wire they give for the thermostat, this allowed us to place it further away and more appropriate to our design. We had strong winds up to 50 mph 2 days ago and the pilot light had no problem staying lit, and the unit functioned beautifully. The cabin is in an off-grid location so having a unit that didn't require electricity was a must. We are very pleased with that, and the silent operation and direct venting setup. The unit installed in the wall nicely, we did a little extra sealing around some of the openings, but the instructions and design are well thought through. Following the instructions is essential, however it would be nice if some of the graphics in the documentation were a little clearer - they are a bit blurry. We bought this unit but had to convert it to propane. Not only this but our elevation is above 7,000 feet, so we contacted Williams and asked them what to do. They told us the orifice to order and where to get it from, which we did with great success. When we received the shipment of the furnace, the original cover was damaged with what looks like a paint application error during manufacturing. It has a nice baked-on enamel paint, and just covering the areas with a spray paint or such would not last nearly as well. We contacted Williams and they promptly sent out a replacement, no questions asked, and we received it in 3 days! However, it was sent Fed Ex, and arrived damaged and with bends in the frame. We contacted Williams again and they sent yet another cover, Fed Ex, and it also arrived damaged. They are sending another one and we have faith that it will be resolved quickly - all of our communications with their customer support have been very positive and treated extremely well and professionally. Overall we are very satisfied with the product and it's performance, and Williams as a company. We are anxious to see what amount of propane we end up using. Home Depot's order process was excellent, with customer service helping with the order as we were trying to find the propane model but had no success. They were very friendly and helped compensate for the needs we had. We feel they went "above and beyond" to make sure our concerns were addressed and that we felt we got the value we were looking for. November 12, 2012
Rated 5.0 out of 5.0 by Perfect match Arrived perfect, installed easily (professionals), does a great job of heating area intended, quiet blower. Only drawback is smell of burner, still trace of smell after 1 week April 1, 2014
Rated 4.0 out of 5.0 by Good heater HD has the best price for this heater. I could not pick one up at any nearby store, though, and shipping did take a couple of weeks. After reading all the reviews, I was worried about shipping damage, but everything arrived in perfect shape. The box is quite large. You'll need a helper or a hand truck to move it around. I did learn that it unpacks easier if you don't open the box upside down, though! The instructions have you make a 9.5" hole in the wall. I did frame a one foot square opening in the inside wall, then cut the 9.5" round hole into the drywall I re-installed over that framed opening. This gives some backing for when you fasten down the "spacer plate". Other than that, I followed the instructions closely, converting the heater to propane with the (separate) conversion kit. I learned that you have to hold the gas valve control down in the pilot position for a *long* time. Once the system is purged of air, everything works great. The heater is quiet with the exception of the occasional sheet-metal "bwong, pop" noise when things expand. It is doing a great job in my 400sf insulated garage inear Everett, WA. Outdoor temp, 34 degrees. Inside, toasty warm 70 degrees. I do notice a fair amount of heat leaving via the vent cap. But I am OK with it. December 24, 2012
Rated 5.0 out of 5.0 by A-ok so far I ordered a Williams 30,000 BTU wall heater from Home Depot. I had it delivered for an additional $99. It arrived a few days before the estimated delivery date. It was delivered while I was at work, to my covered front porch. The heater was in perfect condition after taking it out of the box. I had it professionally installed and it works great so far. I purchased it for backup heat encase of a power outage so it’s not been used very much. I have a small 1000 square foot house and it heated it very well when I tested it. It comes with its own thermostat which is nice so it will start up by itself if no one is home. November 19, 2014
Rated 5.0 out of 5.0 by Fully satisfied so far. After a lot of research for an electric-free vented gas heater (not satisfied with a vent-free), I chose this Williams product. Good packaging, instructions, and quality. I chose the in-store pickup option to save on shipping, which made it the best price I could find. I hired my heating guy to make the final connection for safety's sake, but the rest I did alone. Testing it now by heating about 1,200 feet of my ranch style house with no blower, and even at -5 temps the house ranged from 58 to 73. Having decent insulation and home-made window insulation panels surely helps. Fully satisfied so far. January 9, 2015
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