GSW Signature Series Electric - Manual (Page 80)

68
Appendices
Reference Guide for Water Heating
Oil vs. Electric vs. Propane vs. Natural Gas
Oil 1 litre = 36,515 BTUs*
Example Price = 60.0¢/litre
Electric 1 Kilowatt Hour = 3,413 BTUs*
Example Price = 10.1¢/KW (kilowatt)
Propane 1 litre = 24,197 BTUs*
Example Price = 63.0¢/litre
Natural Gas 1 M 3 35,310 BTUs*
Example Price = 44.0¢/M 3 (cubic metre)**
Formula BTUs per Unit x Efficiency
Cost per Unit
Example: Propane = 24,197 x 92% = 35335 BTUs per $1.00
0.63
GST is extra on all prices.
* Information supplied by The Ontario Ministry of Energy.
** This price reflects delivery charge and monthly administration
charge to service your account.
Formulas and Facts
• 1 gallon of water weighs 8.33 lbs.
• 1 gallon of water has a volume of 231 cubic inches
• 1 cubic foot of water weighs 62.38 lbs. and contains 7.48 gallons
of water
• 100 feet of 3/4" copper pipe contains 2.5 gallons of water; 1" pipe
contains 4.3 gallons
• 8.33 BTU will raise 1 gallon of water 1 o F at 100% efficiency
(electricity)
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