Hearthstone Castleton
#17 in Wood stovesFull review
For a small to mid size home that wants a classic cast iron and soapstone look with clean, long catalytic burns.
Leisure Time $3,899 Lehman's $4,049$3,899
The Hearthstone Castleton and the Hearthstone Green Mountain 40 are evenly matched, rated 3.3 and 3.3. The Hearthstone Castleton leads on convenience. The Hearthstone Green Mountain 40 wins on efficiency. The Hearthstone Green Mountain 40 costs $550 less ($3,349 vs $3,899).
Hearthstone Green Mountain 40
#18 in Wood stovesFull review
For a small to mid size home that wants long, clean catalytic burns and soapstone’s gentle heat in a compact stove.
Leisure Time $3,349 Lehman's $3,499$3,349
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?
- Choose the Hearthstone Castleton for convenience (takes 18 in logs, blower optional vs takes 16 in logs, blower optional).
- Choose the Hearthstone Green Mountain 40 for efficiency (79% EPA tested efficiency (HHV) vs 77.3% EPA tested efficiency (HHV)).
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 weight | Hearthstone Castleton | Hearthstone Green Mountain 40 |
|---|---|---|
| Overall rating | 3.3/5 | 3.3/5 |
| Efficiency 30% | 86 77.3% EPA tested efficiency (HHV) | 95 79% EPA tested efficiency (HHV) |
| Value 30% | 0 $158.88 per 1,000 BTU of EPA tested output ($3,899, 24,540 BTU) | 0 $139.54 per 1,000 BTU of EPA tested output ($3,349, 24,000 BTU) |
| Emissions 15% | 62 1 g/h of smoke particles (EPA) | 58 1.1 g/h of smoke particles (EPA) |
| Warranty 10% | 100 limited lifetime warranty | 100 limited lifetime warranty |
| Convenience 15% | 50 takes 18 in logs, blower optional | 35 takes 16 in logs, blower optional |
Specifications
| Hearthstone Castleton | Hearthstone Green Mountain 40 | |
|---|---|---|
| EPA certification | ||
| EPA certified | Yes (2020 standard) | Yes (2020 standard) |
| Efficiency (HHV) | 77.3% | 79% |
| Emissions | 1 g/h | 1.1 g/h |
| Tested heat output | 12,501 to 24,540 BTU | 14,000 to 24,000 BTU |
| Heating | ||
| Fuel | Cord wood | Cord wood |
| Type | Freestanding | Freestanding |
| Advertised output | 45,000 BTU | 40,000 BTU |
| Heats up to | 1,500 sq ft | 1,400 sq ft |
| Catalytic | Yes | Yes |
| Blower | Optional | Optional |
| Thermostat | No | No |
| App control | No | No |
| Fuel | ||
| Firebox | 1.9 cu ft | 1.3 cu ft |
| Longest log | 18 in | 16 in |
| Power needed | None | None |
| Installation | ||
| Flue size | 6 in | 6 in |
| Mobile home approved | Yes | Yes |
| Safety listing | PFS | PFS |
| Dimensions | 25.5 x 21.875 x 27.5 in (W x D x H) | 23.25 x 19.375 x 30.375 in (W x D x H) |
| Weight | 520 lb | 350 lb |
| Warranty | Limited lifetime | Limited lifetime |