Comfort Glow CGPS2100
#12 in Pellet stovesFull review
A low cost pellet stove for a few rooms or a small home, built by United States Stove Company.
Amazon $1,199$1,199
The Comfort Glow CGPS2100 rates 3.5 among pellet stoves stoves; the Hearthstone Green Mountain 40 rates 3.3 among wood stoves ones. The Comfort Glow CGPS2100 costs $2,150 less ($1,199 vs $3,349).
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.
Scores side by side
These two sit in different type classes (pellet stoves and wood stoves), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Comfort Glow CGPS2100 | Hearthstone Green Mountain 40 |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Efficiency 30% | 90 78% EPA tested efficiency (HHV) | 95 79% EPA tested efficiency (HHV) |
| Value 30% | 25 $51.13 per 1,000 BTU of EPA tested output ($1,199, 23,449 BTU) | 0 $139.54 per 1,000 BTU of EPA tested output ($3,349, 24,000 BTU) |
| Emissions 15% | 56 1.1 g/h of smoke particles (EPA) | 58 1.1 g/h of smoke particles (EPA) |
| Warranty 10% | 50 warranty not published (neutral score used) | 100 limited lifetime warranty |
| Convenience 15% | 69 up to 40 hours per hopper, thermostat | 35 takes 16 in logs, blower optional |
Specifications
| Comfort Glow CGPS2100 | Hearthstone Green Mountain 40 | |
|---|---|---|
| EPA certification | ||
| EPA certified | Yes (2020 standard) | Yes (2020 standard) |
| Efficiency (HHV) | 78% | 79% |
| Emissions | 1.1 g/h | 1.1 g/h |
| Tested heat output | 10,300 to 23,449 BTU | 14,000 to 24,000 BTU |
| Heating | ||
| Fuel | Wood pellets | Cord wood |
| Type | Freestanding | Freestanding |
| Advertised output | - | 40,000 BTU |
| Heats up to | 2,200 sq ft | 1,400 sq ft |
| Catalytic | No | Yes |
| Blower | Included | Optional |
| Thermostat | Yes | No |
| App control | No | No |
| Fuel | ||
| Firebox | - | 1.3 cu ft |
| Longest log | - | 16 in |
| Hopper | 60 lb | - |
| Burn time per hopper | 40 h | - |
| Power needed | 120 V outlet | None |
| Installation | ||
| Flue size | 3 in | 6 in |
| Mobile home approved | Yes | Yes |
| Safety listing | - | PFS |
| Dimensions | 23 x 23.5 x 44.5 in (W x D x H) | 23.25 x 19.375 x 30.375 in (W x D x H) |
| Weight | - | 350 lb |
| Warranty | - | Limited lifetime |