Message to Our Customers


Model # 5009622A

Internet # 100073147

Store SKU # 861081

50,000 BTU/Hr Monterey Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat

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

$594.00 / each

  • Professional installation is recommended
  • 50,000 BTU for powerful heating
  • Requires no electricity for operation


Model # 5009622A

Internet # 100073147

Store SKU # 861081

Store SO SKU # 860980

The Williams Furnace Co. Monterey 50,000 BTU Natural Gas Top-Vent Wall Furnace is designed to be installed in the wall between 2 adjacent rooms. This wall furnace is equipped with an automatic thermostat that can be mounted on the wall or on the furnace cabinet and a matchless pilot igniter. The durable ceramic-coated combustion chamber provides increased efficiency.

California residents: see  Proposition 65 information

  • 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
  • Must be vented through the roof, additional venting material may be required to complete installation; refer to the installation & operating instructions for complete details
  • Installs in the wall to heat 2 adjacent rooms (25,000 BTU/Hr on each side)
  • Natural gas
  • Thermostat included and may be mounted on the wall or on the furnace cabinet
  • May be converted to propane gas with the purchase of an 8909 conversion kit
  • Attractive, soft white finish
  • "Matchless" pilot igniter
  • 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 
Power/Fuel Type 
Natural Gas 
Product Weight (lb.) 
137 lb 
Remote Control 
Room Size (sq. ft.) 
Greater than 900 
Timer Included 
Warranty / Certifications
Certifications and Listings 
ANSI Certified,CSA Listed 
Manufacturer Warranty 
Refer to Williams' Limited Warranty for warranty information 


Rated 4.3 out of 5 by 39 reviewers.
Rated 5.0 out of 5.0 by Everything I hoped... and more! I purchased this unit to replace a 45 year old Westwood wall heater that finally bit the dust. While the overall designs are quite similar, the new unit is much more efficient - and much quieter. I own a small 2 bedroom home, just under 1000 sq. ft., and use this as my only source of home heating. With the optional blower, it works wonderfully! Upon removing the old wall heater, I was pleasantly surprised to find that only minimal modifications were needed to accommodate the new unit. As long as you have moderate to extensive home repair skills, installation will not be a problem. However, the unit is quite heavy and does require 2 people to install - one to lift, push and pull; and the other to guide the unit into place. And be sure to wear gloves - lots of sharp edges and only few places to grip the unit. I'm VERY, VERY pleased with this unit, and would DEFINATELY recommend. December 28, 2014
Rated 5.0 out of 5.0 by First time installation I have never installed a product of this type, although i have considerable experience as a handyman/carpenter. I had been advised to go with contractor to install it, but could not bring myself to pay the quoted $3,600.00 they wanted to put it in. So when i received the heater, i took the time to read the manual, and was relieved that it was easy to understand and straight forward and there was a large diagram of the heater installation on the out side of the box. It took me about two days to remove the old heater and install the new one, including all new venting to the outside. And would you beleive it! As soon as i turned it on, it fired right up and has worked perfectly! I am impressed! The Williams "Monterey" heater is one of the few things i would recommend, and i do. October 29, 2013
Rated 5.0 out of 5.0 by This product looks very nice in my house It's features look nice was easy to install, only problem is the pilot light is hard to get started...Other than that am pleased with product..... May 7, 2014
Rated 5.0 out of 5.0 by Heater works very well. Have used Williams in the past. The wall heater works great and looks nice. Was very easy to install. Everything needed to install was in the package. Williams have been my favorite for many years. November 12, 2013
Rated 5.0 out of 5.0 by Simple to install. Off and running, during cold trend. Simple to install. Hook-up, good thing the instructions were complete, since we couldn't get it to work. Until I read the instruction and noticed that we did not connect the second thermostat (top of heater) to the wall thermostat directly, then to control panel. As soon as we connected wires correctly, the unit was off and running. Suggestion: Highlight this part of instructions. Doesn't mean us guys will read it, but shame on us if we don't...I've gotten older and now I read them! January 22, 2013
Rated 4.0 out of 5.0 by EAsy to install wall heater. Heater was a replacement and was installed in 4hours. Instructions were very clear and concise. May 26, 2015
Rated 4.0 out of 5.0 by Wiliam's makes a great wall furnace... I have been installing these for years. Williams makes a great product. But as I do this professionally the instructions, while great for the homeowner do not advise on every detail. Make sure you always replace the gas flex, never re-use. Make sure you leak test your lines. make sure your flu is not rusted out and the connection is tight, and finally, the most important step, set your gas pressure. These are NOT plug and play and if you do not have the tools, hire a pro. Your unit will run much more efficient, they will know what to look for to make sure you did everything safely, and you will get the longest life out of your unit if you do so. Remember, when dealing with gas, a mistake can cost you your life. October 1, 2013
Rated 3.0 out of 5.0 by needs improvements well, wanted a double unit to sit between a new two bedroom construction. Problem is, the thermostat is one room - unit heats that room quickly - but the other room is still very cold with no way to resolve the problem. Now I have two children, one too cold, one too hot, and not sure what to do! We used it for one month - went to turn it on with the wall thermostat and ... nothing! Cannot get the cylindars to light - handyman says burner is out! One month? Pilot stays lit, but will not fire up! Cannot take it out, too much work and problems, so I will be continuing to work out the kinks in this system. January 10, 2011
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Basic Home Shipping includes delivery to your doorstep or first dry area outside with no signature or appointment required. Delivery services for this item may be upgraded for an additional fee.

Other Delivery Options:

Threshold Home Shipping (By Appointment) includes delivery across your first doorway or threshold (i.e. into garage, backyard, or first room of the home). The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

White Glove Home Shipping (By Appointment) includes delivery to the room of your choice, unpacking and debris removal. Assembly is not included. The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.