
Overview
Replace just the cleanout or exhaust gasket you need.
Lytherm ceramic fiber gaskets seal the cleanout covers and exhaust blower against the stove body. Once a cover has been removed, the gasket often crumbles or compresses and should be replaced to stop air and smoke leaks. Each option is one gasket. Cut-to-size material is a 5 x 12 in. sheet you trim yourself.
Fits these stoves
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| Brand | Models | Choose this option |
|---|---|---|
| ComfortBilt | HP21, HP22i, HP50S | Small rectangle cleanout (3 3/4 x 1 1/2 in.) |
| ComfortBilt | HP22, HP22N, HP61 | Large rectangle cleanout (4 13/16 x 2 3/8 in.) |
| Alpine | HP41, HP42 | Large rectangle cleanout (4 13/16 x 2 3/8 in.) |
| ComfortBilt | HP21, HP22, HP22N, HP22i, HP50S, HP61 | Round exhaust gasket (6 1/2 in.) |
| Alpine | HP41, HP42 | Round exhaust gasket (6 1/2 in.) |
| Alpine | HP40, HP42 | Cut-to-size material (5 x 12 in.) |
Fitment notes: Cleanouts done at every 1-ton cleaning use: HP50 2 small, HP21 4 small, HP22i 4 small, HP22 2 large, HP22N 2 large, HP61 3 large, HP41 2 large, HP42 2 large. The round exhaust gasket is replaced at annual exhaust fan service. Cut-to-size material is for the Alpine HP40 front cleanout and HP42 top riser plates, which have no pre-cut gasket. Door gaskets are sold separately.
Why buy from StoveSource: No Sales Tax · Authorized ComfortBilt dealer · Ships in 1–2 days · 1-888-914-0022
Shipping & Returns
Free shipping on orders over $250 · ships in 1–3 business days.
Free shipping on orders over $250 to the continental US; a flat $22.95 shipping fee applies to orders under $250. Accessories and parts ship by parcel carrier (UPS, FedEx, or USPS), typically in 1–3 business days.
Returns. Unused, uninstalled items in original packaging can be returned within 30 days, subject to a 15% restocking fee.
Sold by StoveSource (authorized ComfortBilt dealer). Ships directly from ComfortBilt.
Recommended for these stoves
This accessory is recommended by Drolet for the following stoves we carry. If your stove isn’t listed, contact us to confirm fit before ordering.
ComfortBilt HP21 Pellet Stove
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ComfortBilt HP22 Pellet Stove
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ComfortBilt HP22N Pellet Stove
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ComfortBilt HP22i Pellet Stove Insert
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ComfortBilt HP50S Pellet Stove
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ComfortBilt HP61 Pellet Stove
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ComfortBilt Alpine HP40 Pellet Stove
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ComfortBilt Alpine HP41 Pellet Stove
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ComfortBilt Alpine HP42 Pellet Stove
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More parts for your ComfortBilt HP21
See all 66 HP21 Parts →-
ComfortBilt Bay Window Front Door Assembly
$249.00
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ComfortBilt CB3002 Wireless Remote Thermostat
$199.99
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ComfortBilt Control Board
$179.99
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ComfortBilt Exhaust
$159.99
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ComfortBilt Stainless Steel Burn Pot Upgrade
$149.99
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ComfortBilt Gen 3 Quartz Igniter
$149.99
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ComfortBilt Room Blower Assembly
$149.00
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ComfortBilt Auger Motor
$134.99
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Customers who bought this also added these.
ComfortBilt Lytherm Gasket Kit for HP21, HP22, HP22i, HP22N, HP50S, HP61, Alpine HP41 & Alpine HP42 Pellet Stoves
Reseal your stove's cleanout covers and exhaust to stop air leaks and smoke smell.Lytherm gaskets seal the ...
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Mill-Pac Black High Temp Sealant (90 ml) for ComfortBilt & Alpine Pellet Stoves
Seal vent joints and stove seams with a black sealant rated to 1,050°F.Mill-Pac is a high-temperature black...
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