Water Heater Sizing Chart

House Type Family Size Peak Daily Water Use Tank size

Gas

 Tank Size

Propane

Tank Size

Electric

Tank Size

Oil

Vacation cottage or very small home 2-3 50 gal 19 19 30 32
Small family home 3 60 gal 30 30 35 32
Home with 2 bathrooms, 3 bedrooms and washing machine 4-5 120 gal 40 40 35/46 32
Home with 3 bedrooms, washing machine and dishwasher 5-6 150 gal 40 40 46 32
Home with 4 bedrooms, washing machine and dishwasher 4-6 180 gal 50 50 72 50
Larger home with 4 or more bedrooms, washing machine and dishwasher
(heavy use)
5-7 200 gal 60 60 97 50
Larger home as above with whirlpool baths 6-8 250 gal 75 75 119 68