Pellet Stove Installation: Steps, Cost, and DIY vs Pro
Updated August 2026
Good news if you're coming from wood-stove research: pellet stove installation is the easier project. Pellet stoves vent through a 3" pellet vent — usually straight out a wall — instead of a full Class A chimney, and many homeowners handle the install themselves in a weekend. This guide walks through what installation costs in 2026, what every install needs, the step-by-step process, and when to hire a pro instead.
Pellet Stove Installation Cost in 2026: The Short Answer
DIY through-wall install: about $1,015 in core parts from our catalog — the 3" vent kit ($429), appliance adapter ($36.95) and hearth pad ($549) — or roughly $1,380 with the recommended clean-out tee and outside air kit added. No Sales Tax on any of it, and your labor is free.
Hiring a pro: national cost guides put labor for a standard freestanding through-wall install in the $250 to $1,500 range depending on region and vent complexity, with fireplace inserts and anything involving chimney work running higher because a liner has to go in. Get two or three local quotes — hearth installers and chimney sweeps both do this work — and check whether your municipality requires a permit either way.
One warning while you compare: several cost guides and retailer pages still advertise a 30% federal biomass tax credit. That credit expired December 31, 2025. Do not build it into your budget.
Before you start: give your stove's owner's manual a read — the clearances, vent setup and floor-protection numbers in there are the ones that count for your model, and your local building department may want a permit and inspection. Every stove we sell has its manual downloadable on the product page.
What Every Pellet Stove Installation Needs
- The stove — see our ComfortBilt lineup comparison if you're still choosing
- Hearth pad — non-combustible floor protection sized to the manual's requirements (hearth pad guide)
- 3" pellet vent — for ComfortBilt stoves that's a DuraVent PelletVent Pro kit for a standard through-wall run
- Appliance adapter — the required first connection between the stove's exhaust hub and the vent
- Termination cap — a weather-tight horizontal cap for through-wall runs
- Outside air connection — required for mobile homes and recommended for basements and tight houses; the wall thimble air intake kit handles the wall pass-through and fresh-air feed in one
- A standard 120V outlet — pellet stoves need power for the auger, igniter and blowers
Installing a Pellet Stove, Step by Step
- Pick the location. An exterior wall shortens the vent run. Measure the manual's clearances to walls, corners and furniture, and confirm an outlet is within reach.
- Set the hearth pad. It must extend around the stove exactly as the manual specifies — our ComfortBilt 36" pad meets ComfortBilt's flatwall requirements, with a 40" corner version for corner installs.
- Cut the wall penetration and fit the thimble. The wall thimble maintains safe clearance where the vent passes through the wall. Locate the hole to respect the manual's minimum distances from windows, doors, soffits and grade.
- Assemble the vent. Twist-lock the sections from the appliance adapter out through the thimble to the termination cap. A short vertical rise inside with a clean-out tee makes future maintenance far easier and helps exhaust in a power outage.
- Connect outside air where required or recommended — it prevents the stove from pulling heated room air (or backdrafting in tight homes).
- Seal and finish. Seal the exterior penetration, fit interior trim, and confirm every joint is locked.
- First burn. Run the stove on a low setting with windows cracked — the first burn cures the paint and smells; that's normal. Verify the exhaust path and room for the convection blower.
How Long Does It Take?
A straightforward through-wall install on a ground-floor exterior wall is a weekend project for a reasonably handy homeowner — the wall penetration is the only demanding step, and the vent components twist-lock. A professional crew typically completes the same install in half a day. Insert installs into an existing fireplace take longer because the chimney liner has to be run and the surround fitted.
The Full Parts List, Priced
Parts pricing from our catalog (No Sales Tax, free shipping on qualifying orders):
| Component | Typical need | Our price |
|---|---|---|
| 3" DuraVent through-wall kit | Every through-wall install | $429 |
| Appliance adapter | Every install | $36.95 |
| Hearth pad (36" flatwall) | Every install on combustible floors | $549 |
| Wall thimble + air intake kit | Mobile homes; recommended for basements/tight houses | $229.99 |
| Clean-out tee | Recommended | $135.87 |
| Horizontal termination cap | Through-wall runs (included in some kits) | $63.99 |
Full fittings list with every elbow, thimble and increaser priced is in our pellet vent pipe guide.
DIY or Hire a Pro?
DIY makes sense for a straightforward through-wall installation on a ground-floor exterior wall: the vent components twist-lock together, the heaviest work is cutting one wall penetration, and the manual gives you every measurement. Budget a weekend and save the labor line entirely.
Hire a pro when the vent must run up through a roof or an existing chimney chase, when you're installing an insert into a fireplace, when local code requires licensed installation for permits or insurance, or when you'd simply rather have the liability on someone else's certificate. A pro install also matters for warranty documentation in some jurisdictions — keep your receipts either way.
Installing a Pellet Insert Instead?
Fireplace inserts like the ComfortBilt HP22i vent through a flexible 3" liner run up the existing chimney — the HP22i liner kit ($489) is purpose-built for it and keeps the insert removable for maintenance. Insert installs are the most common case for hiring a pro, and it is where the labor quotes climb, since the liner run is the expensive part of the job.
The Shortcut: Complete Install Packages
If you'd rather not spec components one by one, every ComfortBilt stove is available as a stove + hearth pad combo that saves up to $249 — the HP22 combo at $2,699 and the HP50S combo at $2,199 are the popular pairings.
Related Guides
- Pellet Stove Vent Pipe: Parts and Prices
- Hearth Pads: What You Actually Need
- Best ComfortBilt Pellet Stoves: All 7 Models
- Pellet Stove Won't Ignite or Feed? Troubleshooting
- Pellet Stove vs Wood Stove
Shop pellet stoves and venting at StoveSource — authorized dealer, No Sales Tax, free shipping.