Hot Water Systems FAQ
What's the difference between storage and continuous flow?
A storage hot water system, as the name implies, keeps ready and heated in a tank before use. The obvious risk is that it's possible to run out of hot water. However, for larger households, it can often be the most economical choice.
Continuous flow (a.k.a. "instantaneous" or "instant") hot water systems don't need prior storage; they heat the water on delivery as required. This is generally the better choice for small households with lower day-to-day water usage.
A storage hot water system, as the name implies, keeps ready and heated in a tank before use. The obvious risk is that it's possible to run out of hot water. However, for larger households, it can often be the most economical choice.
Continuous flow (a.k.a. "instantaneous" or "instant") hot water systems don't need prior storage; they heat the water on delivery as required. This is generally the better choice for small households with lower day-to-day water usage.
Which power supply is best for me: solar, gas, electric or pump?
The following quick pointers will set you on the path to choosing a hot water system.
SolarThis is easily the most cost-effective hot water system in the long run. Unfortunately, it also requires the most up-front cost, so while it will ultimately pay for itself, the initial installation can place it out of reach for many households.
With a solar hot water, most of your water usage is effectively free. Only when it can't power your water heating (such as on a cloudy day, or at night) will a booster be needed to power it another way. A gas-boosted solar hot water system is generally considered the most practical, environmentally friendly option. Many council and government initiatives around the world can offer a rebate for using solar hot water systems, so it's worth checking to see if any such compensation is available in your region. |
GasIf solar doesn't suffice, Gas Hot Water may be your next best option. It's comparatively cheap, energy efficient, and can easily keep up with the demands of a larger household.
Heat PumpEffectively a "referse refrigerator", this device pumps the natural heat outside into the hot water storage area. While nowhere near as widely used, it can ultimately save on cost and environmental impact in hot locations where solar and gas are not practical.
ElectricWhile many homes have older electric water units installed, it's by far the most expensive option. For new installations, it's only recommended as a last resort.
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