ENERGY STAR Qualified Water Heaters — Which Type is Right for You?

Consider High-Efficiency Gas Storage if you:

  • Currently have a gas storage water heater that needs to be replaced.
  • Don’t want to make a major change and are satisfied with the style of water heater you have now.
  • Are willing to pay a little more upfront to reduce water heating bills by about 7%.
  • Want routine installation and maintenance.

When evaluating new models you should also look at the first-hour rating to see how much hot water the model can deliver during a busy hour. You may want to purchase a larger capacity unit, or one with a higher first-hour rating, if you have added or are planning to add more occupants to your household or are installing an additional shower, faucet, dishwasher, or washer that will be in frequent use.

Consider Whole-Home Gas Tankless if you:

  • Want to replace your existing gas water heater before it fails.
  • Are building a new home or conducting a major remodeling project.
  • Often run out of hot water.
  • Have limited space and need a water heater that doesn’t take up much room.
  • Want a water heater with a longer lifetime
  • Are willing to pay more upfront to reduce water heating bills by about 30%.
  • Have a large enough natural gas line in your home (typically at least 3/4″) plus space to install the necessary venting.
  • Are willing to take on additional maintenance tasks or schedule a regular maintenance check every few years.

While the capacity of gas storage water heaters is based on the number of gallons that will fit in the tank, tankless models are rated by how many gallons of hot water they produce per minute (GPM). The more likely you are to have the shower, dishwasher, and clothes washer going at once, the larger the GPM you will need. You will need to consult with an experienced plumber to estimate the hot water demands in your home, but here are some average figures:

  • Shower and Bathtub – 2.5 GPM
  • Kitchen and Bathroom Sink – 2.2 GP
  • Clothes Washer – 3.3 GPM
  • Dishwasher – 1.3 GPM

Consider a Heat Pump if you:

  • Want to replace your existing electric water heater before it fails, but don’t need to do it right now (products won’t be available until sometime in 2009).
  • Are building a new home or conducting a major remodeling project.
  • Are willing to pay more upfront to reduce water heating bills by about 50%.
  • Have space to accommodate a condensate drain.

If your current water heater meets your needs most of the time, you can probably replace it with one the same size.

Heat pump water heaters should be installed in interior spaces that remain between 40°–90° F year-round, and provide 1,000 cubic feet of air space around the water heater. They generally don’t operate as efficiently in colder spaces, and can cool the spaces they are in. If possible, consider installing in a space with excess heat, such as a furnace room.

For more information regarding the Show Me Green Sales Tax Holiday, vist:

http://dor.mo.gov/tax/business/sales/taxholiday/green/

For more information regarding the $300 Federal Tax Credit, vist:

http://www.energystar.gov/index.cfm?c=products.pr_tax_credits

http://www.ahrinet.org/ARI/util/showdoc.aspx?doc=1278

For more information regarding the ENERGY STAR Qualified Appliances, visit:

http://www.energystar.gov/index.cfm?fuseaction=find_a_product.

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