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Use this handy guide to choosing the correct size water heater. Enter the answers in the boxes, then total them up.

Number of people in household	________
Number of tubs and/or showers	________
Add 1 for a dishwasher	________
Add 1 for a washing machine	________
Add 1 for a whirlpool tub	________
Miscellaneous additions*	________

TOTAL	________

*Other things to consider:

If children are entering their teen years, you may want to add 1 to miscellaneous additions.
If you want a more efficient water heater, consider an upgrade to a high-efficiency heater.
If you find yourself running out of hot water, add 1 to miscellaneous additions or upgrade to a quick-recovery and/or high-efficiency water heater.
If there is a whirlpool tub, use a 50-gal. or higher gas or electric heater as a minimum.

After totaling the boxes, use the following chart to determine the size of water heater necessary.

If Total Is...

GAS	4 or less: 30 gallon water heater
	5 to 7: 40 gallon water heater
	8 or more: 50 gallon water heater

ELECTRIC	4 or less: 40 gallon water heater
	5 or 6: 50 gallon water heater
	7 or 8: 65 gallon water heater
	9 or more: 80 gallon water heater

Note: Reasons Not to Install Your Own Hot Water Heater

Even though this chart can give you a good idea of what you need, fuel source, energy efficiency, fast recovery, and venting must all be considered in order to determine the correct model.

Local codes and ordinances may not permit self-installation. Regulations governing water heater installation vary by location. Professional contractors are familiar with the rules and regulations in each city they service.

Installation requires materials and knowledge most homeowners don’t have on hand. Installation involves much more than just attaching a water line. A professional contractor arrives with all the fittings, pipes, parts, tools, venting materials and valves needed to install the job correctly the first time. Most also include removal and disposal of your old water.

A professional contractor may be able to repair your hot water heater instead of replace it. If your hot water heater’s problem is diagnosed as a defective heating element or faulty valve, it can be fixed. A contractor’s experience is the difference between a minor repair and unnecessary investment in a new water heater.

Choosing the Correct Size Water Heater

If Total Is...