Tax credits are available for many types of home improvements including high efficiency heating equipment. And, the maximum available tax credits are as follows:
Furnaces, 95% AFUE or Greater ($150 Tax Credit)
Boilers, 95% AFUE or Greater ($150 Tax Credit)
Electrically Efficient Gas- and Oil-Fired Furnaces ($50 Tax Credit)
Gas- and Oil-Fired Water Heaters, .80 Energy Factor or Greater ($300 Tax Credit)
Electric Heat Pump Water Heaters, 2.0 Energy Factor or Greater ($300 Tax Credit)

Tankless Water Heater Olympia 21 KW Whole House New free shipping US $215.00

Tankless Water Heater Olympia 27 KW Whole House New Free Shipping US $235.00

American Heat AH-18 Whole House Tankless Water Heater US $390.00

American Heat ADK 16 KW Whole House Tankless Water Heater US $269.00

Titan Tankless Hot Water Heater N-160 SCR3 US $350.00

Set of 4 tankless Water Heater valve kits w/ relief US $239.99

Case of 12 tankless Water Heater valve kits w/ relief US $649.99

Tankless Hot Water Heater -Natural Gas - 4.3 GPM 4 Bath Whole House - Marey 16L US $296.95

Tankless Hot Water Heater -Propane Gas - 4.3 GPM 4 Bath Whole House - Marey 16L US $296.95

~Vending & Concession Tankless Hot Water Heater - Propane Gas - 4.3 GPM US $326.65

~RV Tankless Hot Water Heater - Propane Gas - 4.3 GPM On Demand - FREE FEDEX US $326.65

Tankless Water Heater Olympia 18 KW Whole House New US $205.00

~Vending & Concession Tankless Hot Water Heater - Propane Gas - 2.7 GPM - FEDEX US $230.89

~RV Tankless Hot Water Heater - Propane Gas - 2.7 GPM - On Demand - FREE FEDEX US $230.89

Tankless Hot Water Heater - Natural Gas - 2.7 GPM 3 Bath Whole House - Marey 10L US $230.89

Bosch Pro Tankless Water Heater GWH 940 ES Propane LP US $1,124.00

Bosch Pro Tankless Water Heater GWH 940 ES Natural Gas US $1,124.00

Takagi T-M32 LP Tankless Water Heater 240K BTU US $1,589.00

Takagi T-K4-IN LP Tankless Water Heater 190K BTU US $863.00

Takagi T-K4-IN NG Tankless Water Heater 190K BTU US $863.00

Takagi T-K4-OS LP Tankless Water Heater 190K BTU US $869.00

Takagi T-K4-OS NG Tankless Water Heater 190K BTU US $869.00

Takagi T-KJr2-OS Outdoor NG Tankless Water Heater 140K BTU US $665.00

Takagi T-KJr2-IN Indoor LP Tankless Water Heater 140K BTU US $665.00

Takagi T-KJr2-IN Indoor NG Tankless Water Heater 140K BTU US $665.00

TANKLESS WATER HEATER - PROPANE (LPG) - Whole Home Unit US $424.95

BOSCH Pro GWH C 920 ES LP Propane Tankless Water Heater US $2,075.00

BOSCH Pro GWH C 920 ES NG Nat Gas Tankless Water Heater US $2,075.00

BOSCH GWH 425 EF Liquid Propane Tankless Water Heater US $729.99

Ecosmart ECO 11 kW at 240 Volt Electric Tankless Hot Water Heater US $269.50

Ecosmart ECO 18 kW at 240 Volt Electric Tankless Hot Water Heater US $395.00

Tankless Electric Water Heater 8kW - Ecosmart ECO8 US $269.50

EEMAX ELECTRIC WHOLE HOUSE TANKLESS HOT WATER HEATER US $679.99

Eternal GU145 Tankless Water Heater 98% Eff Hybrid US $1,749.00

Noritz NR98-DVC-NG Tankless Water Heater US $1,136.25

Bradford White TG-199E-X Pro Gas Tankless Water Heater US $1,418.40

Bradford White TG-180E-N Nat Gas Tankless Water Heater US $1,208.06

Bradford White TG-180E-X Pro Gas Tankless Water Heater US $1,208.06

Bradford White TG-180I-N Nat Gas Tankless Water Heater US $1,188.87

Bradford White TG-180I-X Pro Gas Tankless Water Heater US $1,188.87

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However, the maximum amount of tax credit to a homeowner for all improvements will not exceed $500 during the two year period of the tax credit.

In addition to this, the tax payer is required to keep with them a Manufacturer’s Certification, certifying that the product or component qualifies for the tax credit. The IRS encourages manufacturers to provide these Certifications on their website to facilitate identification of qualified products.