Buying Whole House Tankless Water Heaters

Admin — Fri, 11 Jun 2010 17:50:44 +0000

As the name suggests, the whole house tankless water heater is designed to serve the hot water requirement of a whole house providing unlimited hot water at different number of fixtures at a time. For example, a single unit can give hot water at two showers or kitchen sink or lavatory or dishwater at the same time. This is a great attraction for large families. The other alternative is the single –point of use units, mostly used by small families.

The main advantage house owners see in a whole house tankless water heater obviously is the low energy cost to run them. One way it saves energy is by saving the standby cost necessary for heating the storage tanks in traditional water heaters. In the case of tankless water heaters, be it whole-house unit or single –point of use unit, there is no storage tank and therefore no standby cost.

Whole House Electric Marey® ECO180 5 GPM 19L Tankless Hot Water Heater On-Demand
US $389.39

American Heat ADK-1 M12 Whole House Tankless Water Heater
US $227.99

American Heat AH-18 Whole House Tankless Water Heater
US $391.00

Tankless Water Heater Olympia 18 KW Whole House New
US $275.00

M12 N120 American Heat Titan Tankless Water Heater Whole House
US $249.00

Marey 16L (4.3 GPM) On-Demand Propane Gas Tankless Hot Water Heater Whole House
US $326.65

Marey 10L (2.7 GPM) On-Demand Natural Gas Tankless Hot Water Heater Whole House
US $230.89

Marey 10L (2.7 GPM) On-Demand Propane Gas Tankless Hot Water Heater Whole House
US $230.89

Marey 16L (4.3 GPM) On-Demand Natural Gas Tankless Hot Water Heater Whole House
US $326.65

M16 N120 American Heat Titan Tankless Water Heater Whole House
US $299.00

American Heat M16 KW Whole House Tankless Water Heater
US $269.00

Electric Tankless Hot Water Heater - Instant On Demand - 5 GPM Whole House 18kW
US $434.50

American Heat M16 KW Whole House Titan Tankless Water Heater
US $269.00

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater 240v
US $727.77

Marey® ECO180 Electric On Demand Tankless Hot Water Heater Whole House 5Gpm /19L
US $353.99

21 kw ELECTRIC TANKLESS HOT WATER HEATER - WHOLE HOUSE - 3GPM EZ TANKLESS
US $349.95

Tankless Water Heater Olympia 27 KW Whole House New
US $399.00

Instant On-Demand Natural Gas Tankless Hot Water Heater Whole House 16L 4.3 GPM
US $326.65

Instant On-Demand Propane Gas Tankless Hot Water Heater Whole House 16L 4.3 GPM
US $326.65

American Heat ADK-1 Whole House Tankless Water Heater
US $227.99

American Heat AH-21 Whole House Tankless Water Heater
US $448.99

American Heat AH-27 Whole House Tankless Water Heater
US $599.00

Rheem RTGH95XP liquid propane tankless condensing water heater NEW whole house
US $1,095.00

New In Box Bosch Powerstar AE-125 Whole House Tankless Electric Water Heater
US $419.00

Whole House: Electric 5 GPM 19L Tankless Hot Water Heater On-Demand
US $353.99

Powerstar AE-125 Whole House Tankless Hot Water Heater
US $375.00

Whole House Electric Tankless Hot Water Heater Microtherm RA18 Electronic
US $250.00

NEW Bosch AQUA STAR 1600HLP Tankless Water Heater Whole House 4.3 GPM
US $552.49

ELECTRIC EZ TANKLESS HOT WATER HEATER - WHOLE HOUSE - 3GPM ON DEMAND 21 KW
US $324.95

BOSCH WHOLEHOUSE ELECTRIC TANKLESS WATER HEATER 17kW RP17PT
US $489.99

BOSCH WHOLE HOUSE ELECTRIC TANKLESS HOT WATER HEATER
US $729.99

Whole House Electric Tankless Hot Water Heater Microtherm RA28 Electronic
US $350.00

Whole House Electric Tankless Hot Water Heater Microtherm RA22 Electronic
US $300.00

HHP HH28 Tankless Water Heater Whole House
US $704.95

PowerStar Whole House Electric Tankless Water Heater AE125 NEW
US $699.99

PowerStar Whole House Electric Tankless Water Heater AE115 NEW
US $469.99

Tankless Hot Water Heater - Natural Gas - 2.7 GPM 3 Bath Whole House - Marey 10L
US $209.90

American Heat 16 KW Whole House Tankless Water Heater
US $289.00

EEMAX ELECTRIC WHOLE HOUSE TANKLESS HOT WATER HEATER
US $679.99

BOSCH AE 125 POWERSTAR WHOLE HOUSE 4GPM ELECTRIC TANKLESS HOT WATER HEATER WHITE
US $818.99

Similarly, both the types function by the same principle. That is, the units heat the cold water, as it enters by a heating element or the heat exchanger. When water enters, the flow of water activates the heat exchanger and when the flow stops the heat exchanger gets deactivated.

So, the tankless water heater operates of its own, heating water as and when needed only. This is unlike a traditional water heater where heating water is a continuous process and therefore more expensive.

The heating exchanger in a tankless water heater can be electric resistance heating coils or gas fired burners. Usually in whole house tankless water heaters, heating exchangers are gas fired burners as they have more heating capacity and therefore more cost efficient than electric resistance heating coils .

Although the whole house tankless water heater is a big advantage to large families, it has certain weaknesses as well. As the number of fixtures is more in the case of whole house tankless water heaters, there is a great impact on the overall flow rate. Because, the volume of water required to heat is large in whole house units.

The flow rate is also influenced by the temperature of the cold water entering the unit and exiting the unit. All this necessitates the use of more than one whole house unit in very large families. As whole house tankless water heaters are costlier than single-point of use tankless water heaters, this force large families opting for whole house tankless water heaters to shell out large amounts for their water heating needs.

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Buying Whole House Tankless Water Heaters