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 M3 35,310 BTUs* | |
| Example Price = 44.0¢/M3 (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 1o F at 100% efficiency (electricity)
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