BTU Heat Chart
This chart is a guideline for heat needed with an approximate 8' ceiling height.
Square Ft
10° F
20° F
30° F
40° F
50° F
60° F
70° F
80° F
400
10,640
21,280
31,920
42,560
53,200
63,840
74,480
85,120
800
21,280
42,560
63,840
85,120
106,400
127,680
148,960
170,240
1,200
31,920
63,840
95,760
127,680
159,600
191,520
223,440
255,360
1,600
42,560
85,120
127,680
170,240
212,800
255,360
297,920
340,480
2,000
53,200
106,400
159,600
212,800
266,000
319,200
372,400
425,600
2,400
63,840
127,680
191,520
255,360
319,200
383,040
446,880
510,720
2,800
74,480
148,960
223,440
297,920
372,400
446,880
521,360
595,840
3,200
85,120
170,240
255,360
340,480
425,600
510,720
595,840
680,960
3,600
95,760
191,520
287,280
383,040
478,800
574,560
670,320
766,080
4,000
106,400
212,800
319,200
425,600
532,000
638,400
744,800
851,200
4,400
117,040
234,080
351,120
468,160
585,200
702,240
819,280
936,320
4,800
127,680
255,360
383,040
510,720
638,400
766,080
893,760
1,021,440
5,200
138,320
276,640
414,960
553,280
691,600
829,920
968,240
1,106,560
5,600
148,960
297,920
446,880
595,840
744,800
893,760
1,042,720
1,191,680
6,000
159,600
319,200
478,800
638,400
798,000
957,600
1,117,200
1,276,800
6,400
170,240
340,480
510,720
680,960
851,200
1,021,440
1,191,680
1,361,920
6,800
180,880
361,760
542,640
723,520
904,400
1,085,280
1,266,160
1,447,040
7,200
191,520
383,040
574,560
766,080
957,600
1,149,120
1,340,640
1,532,160
7,600
202,160
404,320
606,480
808,640
1,010,800
1,212,960
1,415,120
1,617,280
8,000
212,800
425,600
638,400
851,200
1,064,000
1,276,800
1,489,600
1,702,400
8,400
223,440
446,880
670,320
893,760
1,117,200
1,340,640
1,564,080
1,787,520
8,800
234,080
468,160
702,240
936,320
1,170,400
1,404,480
1,638,560
1,872,640
9,200
244,720
489,440
734,160
978,880
1,223,600
1,468,320
1,713,040
1,957,760
9,600
255,360
510,720
766,080
1,021,440
1,276,800
1,532,160
1,787,520
2,042,880
10,000
266,000
532,000
798,000
1,064,000
1,330,000
1,596,000
1,862,000
2,128,000
10,400
276,640
553,280
829,920
1,106,560
1,383,200
1,659,840
1,936,480
2,213,120
10,800
287,280
574,560
861,840
1,149,120
1,436,400
1,723,680
2,010,960
2,298,240
11,200
297,920
595,840
893,760
1,191,680
1,489,600
1,787,520
2,085,440
2,383,360
11,600
308,560
617,120
925,680
1,234,240
1,542,800
1,851,360
2,159,920
2,468,480
12,000
319,200
638,400
957,600
1,276,800
1,596,000
1,915,200
2,234,400
2,553,600
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