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ComfortBilt HP21 Pellet Stove


MSRP: $2,049.00 $2,049.00 $1,699.00


Include an Extended Parts Warranty
Purchase Hearth Pad
Purchase Piping Kit

Product Description

ComfortBilt HP21 Pellet Stove

The ComfortBilt HP21 pellet stove has the bay view window that our customers love in a compact, pedestal design that fits nicely with all decors and room sizes.  Its mid-range performance will heat a modest sized home or work space economically and efficiently. With all the engineering and construction found in our larger wood pellet stoves, this model features:

  • Certified 44,000 BTU output will heat a 2,400 ft² or more if temperatures are mild

  • EPA and CSA Certified to comply with all federal emissions mandates

  • Heat exchanger design and powerful room blower produce maximum heat from pellets

  • Easy to clean heavy gauge exterior

  • 40 pound hopper capacity; ashes fall automatically into a large removable ash pan

  • Pellets burn so completely that the ash drawer only needs emptying every two weeks

  • Five power settings allow up to 16 hours of continuous burning on lowest setting

  • Programmable thermostat allows constant temperature and economical pellet use

  • Rear mounted 3” standard  exhaust port, and 2” standard air intake

  • Exterior dimensions of unit are 23.5” wide, 24” deep, and 33” high with mounted controller

The HP21 Pellet Stove comes with a one-year limited warranty on parts and service.


  • Hopper Capacity: 51lbs

17 reviews

Review provided by Home Depot

Posted by Cmfalbe on July 2, 2020

So you may notice in the questions section of this website question regarding this unit causing smoke and needing constant cleaning. Well I sent an email in to comfortbilt and literally recieved a phone call from Glenn 30 minutes later! (If you go on you tube you’ll see him in a number of helpful pellet stove tutorials). Glen was as kind as could be. He asked me a few questions and quickly identified the issue. I self installed this unit and was venting it up through the roof at approximately 18 feet high. He walked me through a perfect and easy fix with the voltage settings. Glen also gave this first time stove owner a number of tips, recommended a few pellet options (he did at the HD brand was good as well) and even said to call him anytime with questions. I can’t say … More

Review provided by Home Depot

Posted by ewh123 on July 2, 2020

I bought this stove to heat my 28×32 shop with 12 foot ceilings and a 16×32 room upstairs. It does an excellent job heating both. It was about a 4 hour install time, which I did by myself. I also installed a fresh air intake kit. It started up with no problems and is working perfectly. It is heavy so if you do not have some way to lift it off a truck have some help unloading it. I lifted it off my truck with a subcompact tractor with a loader, no problem. I researched several stoves and decided on this one because of the features, reviews, and the price. I feel for the features and the price it cannot be beat.

Review provided by factorypure.com

Posted by Hp50 on July 2, 2020

Installed stove no problem but the instruction book might have been put together by a grade schooler, so went to YouTube and even though that helped my stove wasn’t the one in the video? Figured it out enough to run it on manual and was impressed with the stove itself. Again went back to manual and there is zero illustration of the HP50 showing all the parts and there function or part #’s etc. Prime example was I’m assuming that’s a damper on the front door of the stove but again not in the book or how it is to be used??? We were in a spot where we didn’t have a signal so it was kind of a cluster to figure things out. I just hope this isn’t shadgetting answer on the programming of the HP50? Not impressed with instruction in Michigan. 11/19/19

Review provided by Home Depot

Posted by MontroseCO on July 2, 2020

Purchased this stove last month. Installation was pretty simple, stove looks nice. Due to a hopper malfunction, however, the stove would frequently turn off after just a couple of hours of being turned on. The code would read check hopper or burn pot. When assessing the problem, it was found that the auger had no pellets to feed because of how they empty into the bottom of the hopper. The stove description states that the hopper holds a 40lb bag but in reality, it may hold 3/4 of a 40lb bag. Furthermore, I called and spoke with a ComfortBilt service technician regarding the problem and they are aware of it and are manufacturing a hopper extension to be placed on top of the unit and can be purchased for approx. $90. This, in my opinion, would take away from the aesthetics of … More

Review provided by Home Depot

Posted by Steven on July 2, 2020

After many weeks of research, I decided on this model pellet stove. It met all the requirements I was looking for; heat output, reliability and price. There are several products available that are cheaper and some much more expensive.I chose to go in the middle and the stove does not disappoint.
The stove arrived when promised and in perfect condition. I installed it in my basement of my spilt level home and it heats both areas well. I live in in upstate New York about 1 hour southeast of Buffalo and the winters are very cold. I ave called the mtg. a few times and there technical help line is sterling!
Helpful, knowledgeable and easy to understand, it’s what all help centers should strive to be.
The only downside, is the stove is not setup to attach a thermostat. The temperature is zone controlled. ( any suggestions? )
I heartedly recommend this stove!

Review provided by Home Depot

Posted by Larry on July 2, 2020

I purchased this pellet stove last year and wanted to wait to write a review. This thing is awesome. I have been heating my house with a wood burning stove and this pellet stove blows the wood burning stove away. It puts out twice as much heat and it puts out a consistent heat. No more lighting a fire and waiting for the wood stove to heat up and for the fire to get going. Now I just push the power button on and in a few minutes it is putting out heat. The installation was very easy. Simply cut a hole through the wall and run the pipe through the hole. Another thing I love about it is during the beginning and end of the cold seasons I can turn this on then turn it off after the house warms up and be done with it for the day. A wood burning stove is all or nothing. One thing I do not like about it is how small the opening is on the pellet hopper. It does make it hard to dump the pellets in. It would be nice if it had a bigger opening. I find the 47 pound hopper to be big enough, but of course a bigger hopper would be nice. Once question most people have is how long does a bag a pellets last. When I use it in the morning and evening for a few hours a bag will last 2-3 days up to a week. When it is really cold and we are running it on high all day I will go through a bag a day. Sounds like a lot but when you are heating your house on just wood it is a lot cheaper. I am on propane which is very expensive in my area. The pellet stove is now the cheapest to run out of my 3 options. I like the fact that I can go to Home Depot and buy the pellets Vs. having wood delivered.

Review provided by Home Depot

Posted by SAD on July 2, 2020

We had a 30 year old Whitfield Pellet Stove, it was a work horse for sure. All of the parts started to go on it and since it was so old they were also hard to get. I did a lot of research and found this ComfortBilt. Home Depot did not have it in stock so I found a Hearth Store in my area that did and went to look at it in person. It was just what I wanted, however the Heart Stores price was way out of line. I ordered this from the Depot and it came in 5 days earlier then they said which I was thrilled about. It was no problem installing it since we already had all of the piping and venting from our old stove.
The ComfortBilt is “digital” so it took us some time to figure it out and how to adjust the heat and blower since our Whitfield was just lite and turn the pellet count up and blower up. It’s been running now for 3 days and we are very happy with it. Still some “tweaking” we have to learn would recommend it highly especially for first time pellet users.
Dislikes: The hole to the pellet bin is way to small, can’t just empty the entire bag in like with our Whitfield because they go all over the place.
Takes awhile to ignite like 5 to 6 minutes, not use to that but we will adjust.
Can’t check in the pellet bin to see if you need more pellets because it will shut off and not start up again for 30 minutes (safety issue)
But so far it has met all of our expectations. We had to clean our Whitfield EVERYDAY which was a pain so looking forward to only doing our CB every 3 days (depending on use that is)
Great price for the overall quality of the stove and would highly recommend.

Review provided by Home Depot

Posted by chicortho on July 2, 2020

So this is my first pellet stove and after reading the reviews I bought this stove in early November 2019. I set it up and vented it myself per code thru an external wall in a room in my home that is @1100 sq. ft. and has no other heat source. I would say I am moderately skilled in home renovations and repairs to give you an idea of my skill level and I thought this install was fairly simple. That being said make sure you are well prepared prior to cutting a hole in your home and you have planned out this install thoroughly. I used a duravent double walled vent system with 3M heat resistant sealant and 3M aluminum pipe wrap tape to seal all joints. Also I did use a fresh air intake flexpipe for continuous fresh air. I know this is not necessary, only in a mobile home, but it …

Review provided by factorypure.com

Posted by CJ on July 2, 2020

This is my 1st pellet stove so I have nothing to compare it to, but here are my observations so far. Setup was easy and running the stove controls is intuitive with only some referencing of the manual. I have only run the stove on manual setting and only on level 1 of 5, but the heat output is sufficient to keep a large family room at 74 degrees with outdoor temperature at 40 degrees. I’m fairly certain that as the temperature goes down outside and I increase the setting level the output will be enough to keep the lower level of my house in the 70’s. Build quality is excellent and all the components are easy to access. Keeping the window air wash vent open has kept the glass clean without any creosote build up at all. The only real adjustment I made was to the exhaust blower … More

Great Value for Incredible heat output!

Posted by Allen Edwards on April 29, 2020

We purchased one of these last year and this stove has become my only source of heat replacing my gas furnace! I have saved about $800 last year and after this season this stove will have paid for itself!

Real Comfort

Posted by daniel sweazy on April 29, 2020

The only thing I regret with the stove is that I waited so long to install one. Using it in a house I am remodeling with limited heat and the way it heats the house is amazing. Heat is rarely up past the low setting and it is heating both floors. I did pay for an extended warranty to be proactive and am yet to get any information on it from you?????

Pellet stove

Posted by Denise Bowker on April 29, 2020

The stove is easy to clean. The hopper fits exactly 40# which is inconvenient. It does not empty completely before going out. You have approximately 10-15# of pellets left in hopper when it goes out. The door to the hopper is small, which makes it kind of difficult to fill.

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