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Hot water heat pumps: how they work and what they save

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Quick answer

A hot water heat pump heats your water with heat taken from the outside air, instead of heating it directly with an element. Daikin says its CO₂ Hot Water Heat Pump can deliver the same hot water using up to 80% less energy than a traditional electric system. Delta Air Solutions supplies and installs it in Hamilton and across the Waikato.

In this article6 sections
  1. How it works
  2. What it can save
  3. Useful features
  4. Replacing an electric cylinder
  5. New builds and renovations
  6. Areas we cover

Heating water is one of the biggest parts of a typical household power bill. A standard electric cylinder heats water directly with an element. A hot water heat pump works more like the heat pump on your wall, moving heat from the outside air into the water, so it uses far less power for the same hot water.

How it works

An outdoor heat pump unit draws heat from the air and passes it to the water, which is stored in an insulated tank. The Daikin CO₂ Hot Water Heat Pump uses CO₂ (R744) as its refrigerant and a duplex stainless steel tank. Daikin says it keeps delivering hot water in cooler climates too.

What it can save

Daikin says the CO₂ Hot Water Heat Pump can deliver the same volume of hot water while using up to 80% less energy than a traditional electric system. What you save depends on how much hot water your household uses and your power plan. Its programmable timer can heat the water on cheaper off-peak power where your plan has it.

Useful features

  • Programmable schedule timer, to heat when power is cheaper;
  • heat boost, for faster recovery after a lot of showers;
  • vacation mode, to save energy while you’re away;
  • a built-in display, so no extra controller is needed;
  • a 7-year parts and labour warranty from Daikin on the heat pump and water tank.

Replacing an electric cylinder

The best time to switch is when an old cylinder is due for replacement. We look at where the tank and outdoor unit can go, the pipe runs, the power supply and how much hot water your household uses, and give you a written fixed-price quote. The plumbing connection is done by a licensed plumber and the electrical connection by our registered electrician.

New builds and renovations

In a new build or renovation, planning the tank and outdoor unit early keeps pipe runs short and makes the system easy to service later. Pair it with a heat pump for heating and good ventilation for an efficient, comfortable home.

Areas we cover

We supply and install hot water heat pumps in Hamilton, Rototuna, Cambridge, Te Awamutu, Morrinsville, Matamata, Ngāruawāhia, Huntly and the rest of the Waikato.

Frequently asked questions

How does a hot water heat pump save power?

It moves heat from the outside air into the water instead of making all the heat with an element. Daikin says its CO₂ model can deliver the same hot water using up to 80% less energy than a traditional electric system.

Does a hot water heat pump work in winter?

Yes. Daikin says its CO₂ Hot Water Heat Pump keeps delivering hot water in cooler climates. We size the system for your household before quoting.

What warranty does it have?

Daikin gives a 7-year parts and labour warranty on the CO₂ Hot Water Heat Pump and water tank.

Who does the plumbing and wiring?

The plumbing connection is done by a licensed plumber and the electrical connection by our registered electrician, all in one fixed-price quote.

Areas we coverHamilton & WaikatoRototuna, Flagstaff & HuntingtonCambridge, Te Awamutu & TamahereMorrinsville, Matamata & Te ArohaNgāruawāhia, Taupiri & HuntlyAucklandTauranga & Bay of Plenty

Ready for a comfortable home all year?

Book a free assessment and get a fixed-price written quote for a hot water heat pump.

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