The Water Heating Division of Rheem Manufacturing Co. announced that its entire line of gas-fired tankless water heaters qualify for a $300 federal income tax credit under the new Energy Tax Incentives Act of 2005.

A provision of the legislation, which went into effect Jan. 1, provides a personal income tax credit of $300 to homeowners who install a gas, propane or oil-fired water heater with an energy factor of at least 0.80.

All six models in the Rheem tankless water heater line meet this criterion by carrying energy factors of 0.81 or 0.82, the company stated.

The threshold eliminates tank-type water heaters, except for certain high-efficiency commercial models, but not all tankless models will meet the criteria. Some models may not have the energy factor prominently shown.

“At this point, the IRS has not indicated how the consumer can determine which tankless water heaters qualify for this new tax incentive,” said David Martin, vice president of marketing for Rheem Water Heating. “To be certain which water heaters meet or exceed the 0.80 energy factor criteria, we recommend people check the Web site of the Gas Appliance Manufacturers Association.”

Look for the “Consumer's Directory of Certified Efficiency Ratings” at link below.