The average yearly cost for a conventional gas or electric storage hot water heater is approximately $500 for a 1300sq.ft. four member family home. It varies depending on the number inmates using water for different purposes. Conventional hot water heaters store water and maintain the water temperature to the temperature setting on the tank. This usually between 120° and 140° F. This is a considerable waste of energy used to heat water even when you do not need it. These standby losses works out about 15% to 25% of a household's annual water heating costs.

Another thing on the downside is the time lag for the water to heat up. This is because someone used hot water just before you, and your storage tank water heaters only have a limited amount of hot water.

Tankless Water Heater Olympia 24 KW Whole House New US $225.00

On Demand Alaska Propane Tankless Hot Water Heater LLC US $349.95

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

New Rheem/Paloma 4.2 GPM Tankless Water Heater Propane High Alt. PTG-42PVPH-D US $449.99

New Rheem/Ruud propane tankless water heater RUTG-66XP US $413.99

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

BOSCH AE 125 POWERSTAR WHOLE HOUSE 4GPM ELECTRIC TANKLESS HOT WATER HEATER WHITE US $791.99

BOSCH POWERSTAR AE9.5 POWERSTREAM TANKLESS INSTANTANEOUS ELECTRIC WATER HEATER US $221.99

Noritz NC250-DV-ASME-LP Tankless Water Heater PROPANE US $1,685.95

Rinnai Tankless Water Heater 180,000 BTU / 7.5 GPM up to 3 bathrooms NSF Japan US $767.00

Bosch Tankless On Demand Water Heater US $275.00

Noritz NR83-DVC-LP Tankless Water Heater US $998.75

Noritz NR83-DVC-NG Tankless Water Heater US $998.75

AQUAH ON-DEMAND PROPANE GAS TANKLESS WATER HEATER,12 L, 3.2 GPM US $249.95

AQUAH 16L (4.23 GPM) ON-DEMAND NG NATURAL GAS TANKLESS WATER HEATER US $299.99

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

AQUAH ON-DEMAND NATURAL GAS NG TANKLESS WATER HEATER,12 L, 3.2 GPM US $249.95

Noritz NR111-DV-LP Tankless Water Heater US $1,637.44

Noritz NR111-DV-NG Tankless Water Heater US $1,637.44

Noritz NR111-SV-NG Tankless Water Heater US $1,637.44

Noritz NR66-SV-NG Tankless Water Heater US $761.25

Stiebel Eltron Temptra 12 Tankless Water Heater US $400.00

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

Rheem EcoSense Tankless Natural Gas Water Heater Plus Remote ECO180DVN3 NIB US $999.99

Bosch Pro Tankless 940 ES NG - Tankless Water Heater - Best Price!!! US $899.99

Bosch Pro Tankless C 1210 ESC NG - Tankless Water Heater - Best Price!!! US $1,619.99

Noritz Tankless Natural Gas Water Heater N-075M1 US $400.00

EZ 202 - Tankless Water Heater LP (Liquid Propane). 3.2 GPM + FREE Mfg Warranty US $264.95

NATURAL GAS NG TANKLESS WATER HEATER 16L, 4.23 GPM US $297.95

NORITZ TANKLESS WATER HEATER LONG 4" DIRECT VENT KIT US $209.99

NORITZ TANKLESS WATER HEATER SHORT 4" DIRECT VENT KIT US $289.99

Bosch Pro Tankless C 1210 ES - Tankless Water Heater - Best Price!!! US $1,529.99

AQUAH INDOOR ON-DEMAND PROPANE GAS TANKLESS WATER HEATER 12L, 3.2 GPM US $249.95

AQUAH INDOOR ON-DEMAND PROPANE GAS TANKLESS WATER HEATER 16 L, 4.23 GPM US $329.99

AQUAH INDOOR ON-DEMAND NATURAL GAS TANKLESS WATER HEATER 16 L, 4.23 GPM US $299.99

AQUAH INDOOR ON-DEMAND NATURAL GAS TANKLESS WATER HEATER 12L, 3.2 GPM US $249.95

NEW RINNAI RV53eN - NATURAL GAS TANKLESS WATER HEATER US $549.00

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In a tankless water heaters or point of use hot water heater heat water only as it is used, or on demand. Opening a hot water faucet ignites the powerful burners and the computer monitors the water temperature and adjusts the burners according to the need. High demand, high heat. Low demand, low heat

The whole house tankless water heaters can cater all your household hot water needs. Another benefit of tankless water heateris the space advantage. Some models can be mounted on the exterior of a home. With a tankless water heating or point of use hot water heatersystem you can solve problem of the shortages of tank water heaters. Even for simultaneous multi-outlet use you will never run out of hot water.