Heat Pump 

Heat_pumpsHeat pump systems for heating your water are much more efficient than traditional electric or gas water heaters. They only use energy to “move” the heat but do not create heat. Heat pumps use the same technology to heat water as is used to heat rooms. A well designed and installed system uses less energy than standard electric cylinders.

Heat pump water heaters are not dependant on receiving hours of sunlight and so can work in places that aren’t good for solar water heaters –say the south facing side of your home. Some heat pump water heater models take advantage of the cheaper electricity night rates some power providers have. Some heat pump water heating systems can also give you ‘central heating’. They do this by pumping warm water from the hot water tank around a system of underfloor heating pipes.

Things to keep in mind:

  • Generally, the hotter the outside air the better the heat pump runs. Heat pump water heaters tend to work best in areas with average air temperatures above about 7° Celsius.
  • If you live in a colder part of the country, some consideration is required as not all systems as designed to work at low temperatures. If the heat pump won’t operate in colder temperatures, then the system may rely on the standard electric element so you won’t get the energy savings you’ve invested in and it may not be suitable for your location
  • The upfront cost of heat pump water heating is relatively expensive.
  • In a minority of cases you may need a building consent to install a heat pump water heater. Sunshine Solar can check with your council and advise.
  • There are two different types of heat pump water heater:
    • split systems and
    • all-in-one units.
  • Split systems have the compressor unit outside and the hot water tank generally inside although the tank can also be located outside the house separate from the compressor. In some cases you can use your existing hot water tank.
  • All-in-one units have the compressor and tank together and the whole system usually sits outside.

Sunshine Solar recommends the Bosch Compress 3000 which is an Air to Water heat pump water heater which was developed in Europe converting the same reliable technology used in refrigerators to extract heat from the air and transfer it into the water.

This heat pump reduces energy use by up to 65% compared to a conventional electric storage hot water system.

Operating down to -7°C the Compress 3000 provides you with energy efficient hot water even when it is freezing outside.

Compress 3000 Heat Pump


  • Highly efficient heat pump – reduces energy use by up to 65%
  • Smart Controls to take advantage of:
  • Cheaper overnight power prices
  • PV Solar energy generation systems
  • Noise Reduction Mode
  • Designed for easy and low-cost install and servicing
  • The heat pump operates from -7°C to 40°C, delivering energy efficient hot water even in colder climates

Split System Heat Pump vs Self Contained System

Once you’ve made the decision to go with a heat pump – the next question is: are you getting a split system heat pump or a self-contained heat pump? There are a few things that you should consider before you pick.

Structural Flexibility

One key feature that separates the two systems is that a split system heat pumphas the handling unit and heat exchange separated from the compressor and the outdoor exchanger. In simple terms it gives you the flexibility to install the system wherever you want to.Heat_pump_water_heater

Compartmentalized Cooling and Heating

Free-Delivery Split-Systems are great for families that have different cooling and heating preferences. This system has one outdoor unit and two or more indoor units. This system provides specific heating and cooling for each room with each room having its own thermostat.

Self Contained Heat Pumps

Self contained heat pumps, otherwise known as packaged heat pumps, allows both your compressor and heat exchangers to be located inside your home. Heating and cooling is done through ductwork.Self contained heat pumps are quick to be installed and when it comes to the costs, self contained heat pumps aren’t as pricey as the other systems mentioned.

A warm swimming pool year round?

Heating a swimming pool can be very expensive using standard pool heaters. Sunshine Solar has solar and heat pump technologies that can enable you to swim whenever you want and in a temperature that you choose. A seasonal solar pool heating system is by far the most cost effective way to heat your pool. If you and your family want to enjoy a warm pool throughout October to April an unglazed (or semi glazed) solar pool heating system is what you are after.  However, if you are wanting more consistent pool temperatures year round a pool heat pump system is what you need.

Solar Pool Heating Options

The most cost effective solar water heating system available is using low cost unglazed solar panels.Unglazed solar panel systems move and incrementally heat large volumes of pool water quickly as they do not utilize expensive heat exchangers.

Semi glazed and fully glazed pool heating panels are other options available is say your site does not have enough suitable north facing roof space to accommodate large solar arrays. These panels are great if you are wanting higher temperatures such as in hot tubs and spas.

Heat Pump Pool Heaters

You will find with heat pump pool heaters that they cost more than gas pool heaters. The payoff with this though is that typically heat pump pool heaters have much lower annual operating costs because of their higher efficiencies.  The lifespan of a heat pump pool heater (with typical maintenance) is typically longer than gas pool heaters and so you’ll save more money in the long run.