ComfortBilt HP21 Pellet Stove vs ComfortBilt Alpine HP41

Last updated: October 31, 2026

The ComfortBilt Alpine HP41 is the better stove overall, rated 3.5 to 3.0. The ComfortBilt Alpine HP41 leads on value and efficiency. The ComfortBilt HP21 Pellet Stove wins on warranty. The ComfortBilt Alpine HP41 costs $650 less ($1,299 vs $1,949).

ComfortBilt HP21 Pellet Stove vs ComfortBilt Alpine HP41

Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every pellet stoves stove; a clear win is highlighted. How we rank explains each one.

Factor weightComfortBilt Alpine HP41ComfortBilt HP21 Pellet Stove
Overall rating3.5/53.0/5
Efficiency 30%100 80% EPA tested efficiency (HHV)80 76% EPA tested efficiency (HHV)
Value 30%44 $40.40 per 1,000 BTU of EPA tested output ($1,299, 32,155 BTU)10 $61.38 per 1,000 BTU of EPA tested output ($1,949, 31,753 BTU)
Emissions 15%35 1.6 g/h of smoke particles (EPA)39 1.5 g/h of smoke particles (EPA)
Warranty 10%22 3-year warranty44 5-year warranty
Convenience 15%41 up to 20 hours per hopper, thermostat36 up to 16 hours per hopper, thermostat

Specifications

ComfortBilt Alpine HP41ComfortBilt HP21 Pellet Stove
EPA certification
EPA certifiedYes (2020 standard)Yes (2020 standard)
Efficiency (HHV)80%76%
Emissions1.6 g/h1.5 g/h
Tested heat output12,744 to 32,155 BTU12,349 to 31,753 BTU
Heating
FuelWood pelletsWood pellets
TypeFreestandingFreestanding
Advertised output32,000 BTU32,000 BTU
Heats up to2,200 sq ft2,400 sq ft
CatalyticNoNo
BlowerIncludedIncluded
ThermostatYesYes
App controlNoNo
Fuel
Hopper52 lb40 lb
Burn time per hopper20 h16 h
Power needed120 V outlet120 V outlet
Installation
Mobile home approvedYesYes
Dimensions18.5 x 23 x 34.5 in (W x D x H)23.5 x 24 x 33 in (W x D x H)
Weight-275 lb
Warranty3 years5 years
Released2024-07-

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