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GAS FIREPLACE INSERT
COMPARISON PAGE

SORTED BY: HEATING CAPACITY IN SQUARE FEET

 

TO SORT THE TABLE, CLICK THE HEADING AT TOP OF EACH COLUMN (IE; FIREPLACE OPENING, INPUT, ETC.)
MODEL
FIREPLACE
OPENING
REQUIRED
INPUT
MINIMUM
(BTU/HR)
INPUT
MAXIMUM
(BTU/HR)
HEATING
EFFICIENCY
(PERCENT)
OUTPUT
MINIMUM
(BTU/HR)
OUTPUT
MAXIMUM
(BTU/HR)
HEATING
CAPACITY
(SQ.FT.)
VIEWING
WINDOW SIZE (SQ.IN.)
CLICK HERE FOR DETAILS
MENDOTA
FULLVIEW
FV44i 

25"T
36"W
17"D

NG
16.300
LP
 15,300 
NG
41,400
LP
 40,000 

86.3%

NG
14,067
LP
 13,204 
NG
35,728
LP
 34,520 

UP TO
2,200


25"T
36"W
17"D

NG
6,500
LP
 6,500 
NG
40,000
LP
 39,000 

86.4%

NG
5,616
LP
 5,616 
NG
34,560
LP
 33,657 

UP TO
2,000

HEARTHSTONE
KILLINGTON
HT


21"T
28"W
17"D

NG
13,000
LP
 12,000 
NG
33,000
LP
 33,000 

75%-87%

NG
10,530
LP
 9,720 
NG
26,900
LP
 26,200 

UP TO
1,500

MENDOTA
FULLVIEW
FV33i


19-1/4"T
30-5/8"W
16-1/4"D

NG
10,000
LP
 13,000 
NG
31,000
LP
 31,000 

86.3%

NG
8,630
LP
 11,219 
NG
26,753
LP
 26,753 

UP TO
1,500


22"T
32"W
17"D

NG
19,900
LP
 16,200 
NG
30,000
LP
 29,000 

86.4%

NG
17,194
LP
 13,997 
NG
25,920
LP
 25,056 

UP TO
1,500

 

NOTES

INPUT RATINGS:
Manufacturers size their gas appliances by the heat INPUT rating, measured in British Thermal Units (BTU's). This is a measurement of the heat value of the gas the appliance burns per hour. If the rate of burn is adjustable, the input rating is given at both the lowest and highest burn settings. One THERM of natural gas or one GALLON of LP gas each contain about 100,000 BTU's of heat value, so a gas appliance with an input rating of 20,000 - 30,000 BTU/hr will consume approximately one therm of natural gas or one gallon of LP every five hours when adjusted to its lowest setting, and every 3-1/3 hours when adjusted to its highest setting.

EFFICIENCY RATINGS:
The steady state efficiency rating tells us how effectively a given gas appliance turns fuel into heat. Many factors affect this rating, including altitude, composition of fuel gas, length of intake/exhaust pipe, outdoor temperatures, atmospheric conditions, etc. Some companies publish only the lowest tested efficiencies, some just the highest, some publish both the lowest and highest, and some use an average. For this chart, we've used the AVERAGE steady state efficiency rating, interpolating the unpublished data where necessary.

OUTPUT RATINGS:
To determine the minimum & maximum heat OUTPUT, we multiply the minimum & maximum INPUT ratings by the EFFICIENCY rating. For example, a gas stove or fireplace with an efficiency rating of 75% and an adjustable input rating of 20,000 - 30,000 BTU/hr will deliver 15,000 BTU's of heat per hour at its lowest setting (20,000 x 75%), and 22,500 BTU's of heat per hour at its highest setting (30,000 x 75%).

 

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