The Chimney Sweep Online Fireplace, Woodstove, Gas Stove and Barbecue Shop
The Chimney Sweep Online Fireplace, Woodstove, Gas Stove and Barbecue Shop
While it might be possible to heat a large house with a small insert if you crank the draft control wide open and stand by to add fuel every few minutes, the preferred method is to buy a larger insert and refuel less often. The industry standard for airtights on a low draft setting is an 8 hour, "all night" fire, with coals left at the end of the burn to ignite a fresh load. This column shows the average output over 8 hours. |
Model | Minimum
| Shipping
| Firebox
| Hardwood
| Max. Log
| Heating
| EPA
| Max Output
| Output
| Heating
|
Pacific
| 25" T
| 475
| 3
| 60
| 20" | 72.5% | 3.56
| 97,000
| 43,691
| 2000 - 3000
|
Hearthstone
| 23" T
| 585
| 2.4
| 48
| 22" | 73% | 3.2
| 60,000
| 35,195
| 1200 - 2000
|
Hearthstone
| 21-1/2" T
| 440
| 2
| 40
| 21" | 74% | 1.9
| 50,000
| 29,730
| 1200 - 1800
|
Pacific
| 22" T
| 390
| 1.97
| 39.4
| 18" | 69.3% | 3.4
| 72,000
| 27,424
| 1000 - 1800
|
Hearthstone
| 23" T
| 425
| 1.7
| 34
| 18" | 71% | 4.3
| 40,000
| 24,244
| 700 - 1500
|
Pacific
| 22" T
| 300
| 1.41
| 28.2
| 18" | 71% | 2.9
| 56,000
| 20,110
| 600 - 1400
|
Mathematicians: In order to compute the heat output of a given insert over a given period of time, we need to know the heat value contained in a full load of wood, the efficiency at which the insert extracts that heat, and the duration of the burn. We derived our sustained burn comparison figures using the formula below:( firebox size in cu. in.) x ( 0.015 ) x ( 6200 ) x ( stove efficiency ) / ( burn time )To get the firebox size in cubic inches, we multiplied the cubic foot measurement from the chart above by 1728.The 0.015 is the weight of the fuelwood per cubic inch (we used an average of the top 28 species from our firewood comparison chart ).The 6200 is the BTU (heat) content of the fuelwood per pound, also averaged from our firewood chart, with a slight correction for airspace between wood pieces (nobody loads their insert with one chunk of wood that exactly fits the firebox).For burn time we used 8 hours, which is an industry standard we know all our inserts can meet. |
(our reply form)
