DETAILED CALCULATOR

Heat Gain Calculation
Location			Internal Design Temp	20°C
Room Length (M)			External Temp	25°C
Room Breath (M)			Fresh air per Person	10 l/s
Height (M)			Infiltration	1 ACPH
Room Area
Volume

Solar Heat Gain	Glass Area	Heat Gain, Watts
North
South
East
West
NE			Fill in the appropriate blank for aspect of glass
NW
SE
SW
Skylight

No. of People			Type in the number of occupants
No. of PC's			Type in the Number of PC"s
Lighting: 15 w/Sq.m			Average Lighting level for offices
Infiltration
Fresh Air			Allows 10 l/s per person
Miscellaneous			Add for printers etc.
Total:
Watts per sq.m

Heat Loss Calculation	External Design Temp -1°C)
	Area	U-Value	Temp. Diff	Total
Heat Loss through Glass		2.2	21
Internal Walls		0.5	12
External Walls		0.27	21
Floor		0.25	21
Ceiling		0.25	21
Infiltration	1 ACPH		21
			Total:

Please Note: The information that these calculations are based upon originate from the CIBSE guide. The calculations should be considered as ‘Approximate’ only and not relied upon as accurate cooling or heating load calculations.

G.T.Phelan Ltd. 24 - 25 Southern Cross Business Park, Bray, Co. Wicklow, Ireland, CRO: 31469