Hearthstone Castleton vs Vermont Castings Aspen C3

Last updated: October 31, 2026

The Hearthstone Castleton is the better stove overall, rated 3.3 to 2.7. The Hearthstone Castleton leads on efficiency and emissions. The Vermont Castings Aspen C3 costs $1,900 less ($1,999 vs $3,899).

Hearthstone Castleton vs Vermont Castings Aspen C3

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 wood stoves stove; a clear win is highlighted. How we rank explains each one.

Factor weightHearthstone CastletonVermont Castings Aspen C3
Overall rating3.3/52.7/5
Efficiency 30%86 77.3% EPA tested efficiency (HHV)55 71% EPA tested efficiency (HHV)
Value 30%0 $158.88 per 1,000 BTU of EPA tested output ($3,899, 24,540 BTU)0 $82.26 per 1,000 BTU of EPA tested output ($1,999, 24,300 BTU)
Emissions 15%62 1 g/h of smoke particles (EPA)30 1.8 g/h of smoke particles (EPA)
Warranty 10%100 limited lifetime warranty50 warranty not published (neutral score used)
Convenience 15%50 takes 18 in logs, blower optional50 takes 18 in logs, blower not stated

Specifications

Hearthstone CastletonVermont Castings Aspen C3
EPA certification
EPA certifiedYes (2020 standard)Yes (2020 standard)
Efficiency (HHV)77.3%71%
Emissions1 g/h1.8 g/h
Tested heat output12,501 to 24,540 BTU24,300 BTU
Heating
FuelCord woodCord wood
TypeFreestandingFreestanding
Advertised output45,000 BTU39,300 BTU
Heats up to1,500 sq ft1,200 sq ft
CatalyticYesNo
BlowerOptional-
ThermostatNoNo
App controlNoNo
Fuel
Firebox1.9 cu ft1.2 cu ft
Longest log18 in18 in
Power neededNoneNone
Installation
Flue size6 in6 in
Mobile home approvedYesYes
Safety listingPFSOMNI
Dimensions25.5 x 21.875 x 27.5 in (W x D x H)16 x 24.25 x 25.0625 in (W x D x H)
Weight520 lb-
WarrantyLimited lifetime-

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