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Steady-state heat loss from a building
U-VALUE
m
2
in
m
2
in
m
2
in
m
2
in
m
2
in
Heat loss rate
ELEMENT
W/m
2
K
zone 1
zone 2
zone 3
zone 4
zone 5
(W/K)
Zone volumes (m3)
Air changes/hour
Cubic metres per hour
Total heat loss rate
W/K
(equivalent to
kWh per degree day )
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