The Williams Furnace Co. Monterey 25,000 BTU Natural Gas Top-Vent Wall Furnace allows you to heat a room without the need for electricity to save you money and keep you warm during power outages. This wall furnace comfortably installs between wall studs and can be converted to run on liquid propane with the use of an optional conversion kit (not included).
(39 reviews) 39
85%of customersrecommend this product33 of 39reviews
Rating Breakdown39 reviews
85%of customersrecommend this product33 of 39reviews
I am a contractor pro. I have had to replace dozens of old Westwood wall heaters with Williams Monterrey 25,000 btu models. One thing I have noticed is how the ignitor quality has gotten worse over the past 10 years. The last three I installed in 2014-15 had defective ignitors. Thought the first one was a fluke, until I got two more. Two ignitors had broken insulators that caused the ignitor to short out to the frame. One had a damaged holder that never held the wire end tight. I had to remove them and show the tenant how to light the heaters with a butane lighter. They needed heat now. I was not going to uninstall the heaters just to get a unit with a new ignitor. A replacement ignitor is about $20 plus shipping. Williams customer service is expensive. Just be aware that you should test the ignitors now before you install the heaters. I know I do. I might even open them at Home Depot and check them before I leave. Also, I have had tenants push the red ignitor button trying to light the pilot to the point that it would not spark anymore. The wire end does not always spark at the pilot gas outlet.
Pros: Durable, Easy to Install
Cons: bad ignitor design
4out of4found this review helpful.
Review 2 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
I was thrilled to find the heater on home depot.com for such a great price. We purchased the heater, the wall brace to avoid cutting into the wall, and the fan. The heater and accessories were shipped & arrived within a few days - so far, so good. Surprisingly, Home Depot does not carry all of the required parts to install the heater. The heater requires a 4" Oval to 4" Round vent pipe converter which is very difficult to find. After hours of searching for the converter online - we were able to find the "kit" which was over $100 plus shipping - we couldn't wait ten to fourteen days to receive the parts. ... so much for easy and so much for purchasing the heater at a bargain price... Finally, we were able to find the converter at a local mom & pop hardware / plumbing store for a fraction of the price than it was online.
Pros: Easy to Clean, Good Size & Weight, Nice Design
Cons: Difficult to Install
6out of6found this review helpful.
Review 3 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
I replaced a 50 yr old wall furnace with this unit. Installation was very easy due to the fact the new furnace fit almost exact to the old unit. Exhaust was already in and new vent attached the same as the old, gas line had to be shortened , all in all , the installation was straight forward , with no hassles.The new furnace was no match for weight , quality , and durability compared to the old. But then again, nothing is made as good as it was 50 yrs ago.
Pros: Easy to Install
Cons: instructions leave a lot to be desired
5out of5found this review helpful.
Review 4 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The BIG item which you need to know if you are using this unit for two rooms is to order the assessory part number Willaims number #6901 (I don't know the Home Depot number) for a rear vent and cover registery kit to convert it into use for both rooms - this is not stated in the website.
The Williams company has since the 1960's or more has made good products. Don't get the one with the motorized fan blower if the unit is up in flames - then it will blow flames into your room!
The rough in size is about 14 3/4"in width which is not stated on the website so it fits between the studs which is nice. The finish sizes are state on the website.
29out of30found this review helpful.
Review 5 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The furnace arrived earlier than expected, which was great since the one it replaced had quit working. The thermostat that comes with the unit is a nice feature that I didn't have with the last furnace. The installation was relatively simple.
Pros: Durable, High Quality, Easy to Install, Good Size & Weight, Nice Design
Images for this Review
(click to see full-size image)
This image was submitted as a sweepstakes entry.
3out of4found this review helpful.
Review 6 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
I just replaced a Williams Furnace built in '82 as it was warn out. You could hear the old furnace creak and crack while it heated up, the new furnace you can't hear at all. The installation is pretty simple and fit right into the old spot. I didn't use the thermostat they provied as the one I have is programmable, the one they provide is similiar to the old dial type, and mine hooked right up.
22out of22found this review helpful.
Review 7 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The furnace appears to be OK but having trouble getting flue pipe required. Home Depot sells this furnace but does not sell the required flue vent pipe. Seems odd they would sell a product but not sell the required material to beable to complete installation.
26out of27found this review helpful.
Review 10 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
I just installed this in May in my rental unit. It appears to work great, I purchased the optional fan unit and I was really suprised how well this unit pushed air as the fan sits on top as a last ditch effort to suck heat from the flue. It was not very cold outside so I will not be able to contest how well it works in cold weather. The instructions were a bit confusing at times but if you take your time and logically breakdown the install it's not bad at all. It does look very nice installed. I will say like most modern devices they use cheap thin metal and can easily be damaged. But look at the price and one cannot complain :)
10out of11found this review helpful.
Review 11 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
Replaced an existing wall furnace of unknown make or output in around 2 hours with this furnace. Care must be taken to get the receiving opening to the correct dimensions as well as the spacing from floor to ceiling; not too difficult though. It has great output and the cheap thermostat seems to work very well; not enough thermostat cable is included nor is there a flexible connection included to connect the gas to the furnace. The directions are easy and straight forward and the furnace seems sturdy with a modestly good looking cover.
Pros: Durable, Easy to Use, Sturdy, Easy to Install, Looks Great, Good Size & Weight
Cons: missing connective parts
0out of0found this review helpful.
Review 12 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
Bad instructions, product, and no customer support
PostedNovember 28, 2012
No, I do not recommend this product.
If you purchase this product, you will notice that the web instructions, packaged instructions, and the sticker on the header all have different measurements for the header height - I had to make a decision on using the top header dimensions. If you use the bottom header instructions, your header may not fit properly. The face panel will not fit without forcing it on the heater. After careful measurements, I noticed that the opening for the face panel is about a 1/8 inch smaller than the screws they used to assemble the heater - no wonder it doesn't fit. I have been trying to resolve this by contacting williams distributing by email. Note, the packaged instructions have only a mail contact for williams distributing - guess they don't want you to contact them. I have emailed repeatedly, however the person that keeps responding is robo responding, he does not even read the email. I am so tired of this company and this product. I spent so much money and time to replace an ugly furnance, however I wish I can keep the old furnance now.
13out of14found this review helpful.
Review 14 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The heater works very well. The instructions leave a little to be desired in particular as to the installation of the header plate. (My house is not normal drywall and 2x4 construction though.) My Home Depot carried the oval vent plate, oval pipe and round pipe, but the oval to round adapter was not available at my store and I had to call all over town to find one. They do not do store -to store transfers nor ship these items, plan on that. My biggest complaint was the fit of the grill. Way off spec, I had to modify it to get it to fit. Much higher quality of heat than the WW2@ era one it replaced!
3out of3found this review helpful.
Review 15 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The exhause venting is specialized (oval), not available locally here in Joplin, and expensive online but, if you want to install a wall furnace on an inside wall, you will need oval venting and this heater is an excellent option.
7out of7found this review helpful.
Review 16 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The furnace itself works fine, however the fan accessory is poorly designed. It would not come on. I had to engineer changes myself so that it came on automatically. This is not something I recommend for the novice. The BIGGEST PROBLEM was with the online ordering. The store clerk ordered as home delivery which I had to personally clear up with the online store. Secondly my order arrived first later than promised by online order and then even later by the shipper (Non-Stop). I found out later the order was actually in town for a week before they delivered it to the store.
0out of0found this review helpful.
Review 20 for 25,000 BTU/Hr Top-Vent Gravity Wall Furnace Natural Gas Heater with Wall or Cabinet-Mounted Thermostat
The furnace works great. The pilot is louder than I would like. I plan to get a tech to come in and check the gas flow settings. This furnace requires 4" BW vent. (4" oval double wall. dura vent brand) This is not available locally. I had to order it online. There was some minor damage to the outer cover. I just installed the furnace yesterday and will contact Home Depot Monday about that.