Heating calculation
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

 
View only
 
 
Still loading...
ABCDEFGHIJKPQRSTU
1
AreaR-valueΔTHeat loss
2
ft²ft²·°F·hr/BTU°FBTUs per hour
3
WALLS
4
North wall414
5
Outdoor temp0°FWest wall530
6
Indoor temp72°FSouth wall431
7
Basement temp40°FEast side597
8
Basement floor temp51°FSouth upper wall54
9
GROSS WALL2,026
10
Heat loss (BTU/hour)NET WALL1,68638723,195
11
Walls3,195WINDOWS
12
Windows3,396W1357.172357
13
Roof1,713W2a66.77261
14
Floor1,568W3a65.97269
15
Ventilation776W3b65.97269
16
Exfiltration1,654W4348.372295
17
Total heat loss when outdoor temp. is 0 °F12,302btu/hourW5667.77262216,000
18
W6417.172415250
19
W7a146.37215815,000
20
W7b146.3721580.94
21
W8197.772177
22
W9197.172190
23
W10a127.172123
24
W10b127.172123
25
Front door297.072302
26
Rear door277.072277
27
TOTAL WINDOW3403,396
28
ROOF
29
2nd floor roof345
30
1st floor roof845
31
TOTAL ROOF1,19050721,713
32
FLOOR
33
Main floor1,05425321,349
34
Basement staircase922532118
35
Basement landing932163
36
Basement door18153238
37
TOTAL FLOOR1,568
38
VENTILATION
39
HRV ventilation rateft³/min40
40
HRV efficiency0.75
41
42
specific heat of dry airbtu/ft³·°F0.0180
43
HRV ventilation rateft³/hour2,400
44
Delta T°F72
45
Energy to heat incoming airbtu/hour3,102
46
Energy recovered by HRVbtu/hour2,327
47
Heat loss to ventilationbtu/hour776776
48
EXFILTRATION
49
ACH50 (estimate)0.80
50
House volumeft³16,000
51
Exfiltration at 50 pascalsft³/hour12,800
52
Exfiltration actual (SWAG)ft³/hour1,280
53
Heat loss to exfiltrationbtu/hour1,6541,654
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Loading...
 
 
 
Sheet1