Pellet Stove for a Garage or Shop: Code, Sizing and the Right Model
Yes, you can put a pellet stove in a garage or shop in most places, and it's often a better fit than a wood stove. There's no chimney to build, it holds a set temperature on its own, and you're not feeding logs every hour. There are three things to sort out first: what your building department says about ignition sources in garages, where the stove gets its combustion air, and what you store in there.
Below are those rules, how to size a stove for an uninsulated space, and which models fit. Every stove we sell ships with No Sales Tax in any state and free shipping.
Why pellet suits a garage
- No chimney. A pellet stove vents through the wall with 3" pellet pipe. The ComfortBilt 3" pellet vent kit ($429) covers a standard through-wall install. A wood stove in a single-storey shop needs a full chimney that clears the roof.
- It runs itself. Automatic ignition and a thermostat mean the shop can sit at 45°F all week and warm up before you walk in.
- Small clearances. The ComfortBilt HP stoves need just 2" from the back wall and 7" from a side wall, per their manuals. Wood stoves typically need 14–24" without a heat shield, which eats shop floor.
- Clean fuel. Bagged pellets stack on a pallet, with no woodpile, bark or insects.
The trade-offs: a pellet stove needs electricity to run, the pellets have to stay dry, and a big, drafty pole building can outgrow what a pellet stove puts out. If any of those rule it out, our wood stove for a garage or shop guide covers the wood option.
Check these before you buy
1. The 18-inch ignition rule
The International Residential Code requires appliances that have an ignition source to be raised so the ignition source is at least 18 inches above a garage floor, unless the appliance is listed as resistant to igniting flammable vapors. The reason is that gasoline vapor is heavier than air and settles along the floor. A pellet stove's igniter is an ignition source, and many inspectors apply the rule to pellet stoves in garages where vehicles park or fuel is kept. Detached shops with no vehicles are often treated differently.
Ask your building department how they apply it before you buy. If they require it, the usual answer is a sturdy non-combustible platform, with the stove's floor protection on top.
2. Combustion air from outside
Drolet's ECO-55 manual says it's forbidden to draw combustion air from a garage, Englander makes outside air mandatory on the 25-CBPAH, and ComfortBilt recommends outside air where the room is tight or under negative pressure. In a garage that means fitting an outside air kit so the fire breathes clean outdoor air rather than whatever is floating around the shop. The 2" outside air kit ($95) fits pellet stoves with a 2" intake, and the DuraVent 3" wall thimble with outside air kit ($229.99) combines the vent pass-through and intake in one part for ComfortBilt stoves.
3. What you store in there
Gas cans, solvents, paint thinner and propane cylinders don't belong near any stove. Move them to a separate cabinet or outbuilding. In a woodshop, keep sawdust off the stove and away from the air intake; a pellet stove's blower and intake will pull in fine dust.
4. Your insurer
Tell your insurance company before installing, and ask whether they need an inspection sign-off. Some treat a stove in an attached garage differently from one in the house.
Sizing a pellet stove for a garage
Heating-area ratings assume an insulated house. A garage usually has thin walls, a big uninsulated door, a slab that pulls heat and a high ceiling, so size up a class from what the square footage suggests, and compare stoves on heat output rather than the square-footage headline.
| Space | Typical size | Stove to look at | Max output | Price |
|---|---|---|---|---|
| Single garage, insulated | 250–500 sq ft | Alpine HP40 | 26,000 BTU/h | $1,099 |
| Two-car garage | 400–700 sq ft | Alpine HP41 | 32,000 BTU/h | $1,299 |
| Three-car garage or mid-size shop | 700–1,200 sq ft | Alpine HP42 or HP22 | 40,689–42,000 BTU/h | $1,499–$2,399 |
| Large shop, used daily | 1,200 sq ft and up | HP61 or HP22N | 39,769–40,689 BTU/h | $2,299–$2,599 |
Two notes on that table. In a single garage that isn't insulated, start with the HP41 rather than the HP40. And for an uninsulated pole building much over 1,500 sq ft, a pellet stove tops out at around 40,000 BTU/h; a large wood stove like the Drolet HT-3000 puts out up to 110,000 BTU/h.
Clearances and floor protection
| Stove | Back wall | Side wall | Corner |
|---|---|---|---|
| ComfortBilt HP22, HP50S, HP61 | 2" | 7" | 5" |
| Drolet ECO-55 | 3" | 6" | 3" |
Minimum clearances to combustibles from each manual (USA). Drolet recommends 12" behind and 24" at the sides for service access.
ComfortBilt's manuals call for non-combustible ember protection extending 6 inches in front of the glass and 6 inches to each side. A bare concrete slab is already non-combustible; on a wood floor, a mezzanine or a raised platform, use a hearth pad. Our hearth pad guide shows which pads fit which stove.
Venting out of a garage
Vent straight out through the wall to open air. Pellet vent has to terminate outdoors, never into an attic, a carport or another enclosed space, and well clear of doors, windows and the overhead door opening. Englander's manual sets the termination at least 2 feet above grade and higher where snow drifts. Our pellet stove venting guide covers termination distances and when you need a vertical rise.
Thermostats and remote control
This is where a pellet stove earns its place in a shop. The ComfortBilt HP stoves run in Manual, Temp, Weekly or wired-thermostat mode, and the Alpines offer temperature and weekly-schedule modes with a remote. Add the BC Innovate Wi-Fi module ($129.99) and you can turn the stove up from your phone on the drive home, so the shop is warm when you open the door. Our pellet stove thermostat and Wi-Fi guide covers every control option.
Power
A pellet stove needs a standard outlet. The HP22 draws 4.3 amps for ignition and 1.8 amps running, per its manual. If the power drops, the stove shuts down, so a shop that loses power often, or has none, is a case for a wood stove instead.
What to buy
- Most two-car garages: the Alpine HP41, 32,000 BTU/h in an 18.5"-wide cabinet.
- Fewest refills: the Alpine HP42, with a 120 lb hopper that ComfortBilt rates at up to 80 hours on low.
- A shop you work in every day: the HP22 or HP61, with full thermostat control and 80%+ EPA-certified efficiency.
Related guides
- Wood stove for a garage or shop
- Pellet stove in a basement
- Best small pellet stoves
- Pellet stove installation guide
- Best ComfortBilt pellet stoves
Every stove we sell ships with No Sales Tax in any state, free shipping and a price match guarantee. Browse the pellet stove lineup or call 1-888-914-0022 with your garage size, ceiling height and insulation, and we'll size it with you.
Clearance, venting and air figures are from each manufacturer's owner's manual as of October 2026 and differ by model. Always follow the manual for your stove, and check with your building department and insurer before installing any stove in a garage.