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METHOD A - (domestic hot water usage for C.1)
TABLE A 1 (NATURAL GAS AND PROPANE)*
No. of Bathrooms 1 to 1.5 2 to 2.5 3 to 3.5
No. of Bedrooms 1** 2 3 2 3 4 5 3 4 5 6
Nominal Tank Size (USG) 30 40 50 50 50 50 60 50 60 60 75
TABLE A 2 (OIL)*
No. of Bathrooms 1 to 1.5 2 to 2.5 3 to 3.5
No. of Bedrooms 1** 2 3 2 3 4 5 3 4 5 6
Nominal Tank Size (USG) 32 32 32 32 32 50 50 32 50 50 50
* Not suitable for luxury or high volume applications
** If laundry is ensuite for a one bedroom dwelling, increase tank size to 40 USG
METHOD B - (domestic hot water usage for C.2)
Activity Average Volume per usage - USG X Times used in Peak Hour = Peak hr Usage - USG
Shower Hi-Flow (old) Low-Flow (new)
5 min. 15 4 X =
10 min. 30 7 X =
15 min. 43 11 X =
Bath Tub 1/2 full 21 X =
Whirl Pool (60% tub cap.) from manufacturer X =
Personal Use 3 X =
Shampooing Hair 5 X =
Clothes Washer hot/warm 40 X =
warm/warm 27 X =
warm/cold 20 X =
Hand Dish Washing 4 X =
Automatic Dish Washer 18 X =
Food Preparation 6 X =
Other X =
TOTAL
(min. first hr. rating) (transfer to C.2) =