Quick Answer: How Does An Indirect Water Heater Work?

How long does an indirect water heater last?

Indirect water heaters typically last 15-20 years.

What is the difference between a direct and indirect water heater?

Direct fired water heaters are solely dedicated to the job of hot water generation, providing a faster heat up and response time compared with an indirect system which is in fact ‘ heating water to heat water ‘.

Do indirect water heaters run out of hot water?

An indirect system is able to provide a high volume of hot water, so if you are running short it may be that the thermostat is set too low or is broken. It may also be the result of a bad circulator or circulator relay, or the unit could be air-bound and in need of purging.

How is an indirect water heater controlled?

The temperature in the indirect water heater is controlled by a thermostat mounted on the water heater tank. That thermostat turns on or off the circulator pump. Separate, independent temperature controls back in the heating boiler actually turn the heating boiler’s burner on or off as needed.

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Is an indirect water heater worth it?

Indirect water heaters are a more efficient choice for most homes, even though they require a storage tank. An indirect water heater, if used with a high-efficiency boiler and well-insulated tank, can be the least expensive means of providing hot water, particularly if the heat source boiler is set to “cold start.”

How much does it cost to replace an indirect water heater?

Indirect water heaters cost $800 to $1,500 on average. An extremely efficient choice, they consist of a tank that pulls heat from a nearby boiler or furnace, rather than relying on an independent heat source. The systems can be fired by gas, oil, propane, electric, solar energy or any combination of these.

How do you size an indirect water heater?

Size the expansion tank to 10% of the water heater’s capacity. Example: Heater capacity = 30 gallons / 10% requires a minimum three-gallon tank.

Is a combi boiler a direct or indirect system?

In a direct system, all of the cold outlets are supplied by the mains. The cold water storage cistern supplies only the hot water cylinder. Alternatively, there may not even be a storage cistern if the property has a combi boiler or an unvented hot water cylinder.

Is an indirect water heater electric or gas?

During the winter, both the boiler and water heater operate using two separate gas lines in a conventional water heater. Since an indirect-fired water heater uses its connected boiler’s energy, it does not require its own gas line.

What is indirect hot water system?

An indirect hot water cylinder typically uses an external energy source, such as a traditional central heating boiler or a solar thermal system, which is fed into the cylinder via a coil or heat exchanger which then ‘indirectly’ heats the hot water.

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What is indirect heating system?

Indirect heating systems are fresh-water stations and heat exchanger systems (powered by solar-thermal and the domestic heat system). Storage of hot water is similar to the domestic heating storage systems. In all systems the heating of the water takes place by heating coils or heat exchanger.

How long does a Weil McLain indirect water heater last?

With proper maintenance, they are expected to last at least 15 years or longer. Weil-McLain boilers come with a 10 year non-prorated heat exchanger warranty for commercial boilers, 12 year non-prorated heat exchanger warranty for residential boilers and two year parts warranty for both categories.

What temperature should an indirect water heater be set at?

The recommended temperature for normal residential use is 120°F. The dial on the aquastat does not always reflect the out-coming water temperature, which could occasionally exceed 120°F.

Is a 40 gallon indirect water heater enough?

Most indirect manufacturers rate their tanks at varying BTU/Hr inputs. Going from 120 degrees to 150 degrees will increase the effective size of the tank by 25% just like that a 40-gallon tank can give the initial output of a 50-gallon tank, and help prevent Legionnaires as a bonus!

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