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Gas Hot Water Systems

Gas is  a very efficient way to heat water. If you have a gas connection to your home, a gas hot water system is almost certainly the way to go.

The most efficient way to use a gas hot water system is as a booster for solar hot water. But if aren’t ready to make the investment in solar hot water panels, or don’t have the roof space to consider solar, then don’t be disheartened! A stand alone gas hot water system is still a very cost effective way to get your hot water.

Environmentally gas is pretty good too, with 65-75% lower greenhouse emissions compared to conventional electric water heating.

Gas heaters have a voluntary efficiency star rating from 1 to 6 stars. My advice is always go for the 6 star ones (even though we sell the lower rated models too). A 6 star heater will not only save you cash from day one, through lower gas bills, but it is a sign that the manufacturer has put a lot of effort into the design and manufacture of the hot water unit.

If you are looking to get a new gas hot water system, then the first thing you need to think about is what style of water heater you want to go for. Your choice is between ‘Instant’ and ‘Storage’…

Instant vs. Storage Gas Hot Water Systems

Instant gas hot water systems heat the water as and when you use it. This means there is no tank full of hot water to cool down and lose energy. Which, in turn, means they are more efficient than storage gas hot water systems.  But having said that, the benefit of an instant heater does decrease, the more water your home uses.

If your home uses less than 150 litres of hot water per day, the energy advantage over storage heaters is about 10%. If your home uses much more than 200l of hot water per day then there is actually rock-all difference between gas-storage and gas instant. As Paul Daniels would say “Not a lot of people know that!”

How much do they cost

High Usage Homes (xxx-yyyl per day)

Expect to pay xx-yy for a instant gas hot water heater unit and around zzz to have it installed (assuming xxxxxx).

Expect to pay xx-yy for a storage gas hot water heater tank and around zzz to have it installed (assuming xxxxxx).

Low Usage Homes (xxx-yyyl per day)

Expect to pay xx-yy for a instant gas hot water heater unit and around zzz to have it installed (assuming xxxxxx).

Expect to pay xx-yy for a storage gas hot water heater tank and around zzz to have it installed (assuming xxxxxx).

The moral of the story: it really pays to get your hot water usage down before you get a new gas hot water heater and you can save a good chunk of change.  How do you reduce hot water usage? Easy! Consider low flow shower heads and taps, cold clothes washes (they really do work!), a more water efficient dishwasher and banning showers on days beginning with the letter ‘T’. (That last one was a joke by the way.)

 A word on Natural Gas vs LPG

for P or G to write!

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