Considerations

Controls

Most systems are operated by a wall-mounted remote control which sets the temperature, controls a timer and sets the fan speed.


Auto mode

A feature that automatically switches the unit between heating and cooling to maintain a pre-set temperature.

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Air speeds

At least three air speeds are available on most models. You need a high speed for fast warm-up from cold, and lower speeds as the temperature controller starts to operate. Low fan speed means fewer draughts, less energy consumption and a quieter operation.

Fan-only mode

Lets you circulate the air on a hot day without the added expense of cooling.


Louvres

Most models have louvres that automatically adjust to direct the air flow for optimum heating or cooling. On some, the fins can oscillate to distribute the air evenly over the room.


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De-icing

In very cold climates the outside unit can build up ice on the evaporator, which effectively stops the unit from functioning. A de-icing feature prevents this.


Timer

A heat pump can be expensive if you run it all the time over winter. To allow you to avoid this, most have a timer, either 12-hour or 24-hour. A real-time 24-hour clock is best, as it lets you program the appliance for optimum night-and-day operation without having to re-set it every day.


Filters

Various levels of filtration are available, and some filters are specially treated so they deodorise and "purify" the air. Filters don't last forever and should be replaced according to the manufacturers' recommendations. They need regular cleaning, but it's easy enough to do.


Noise

The fan in the inside unit of a heatpump should produce little more than a low hum in low-speed mode, but the compressor plus fan of the outside unit can be quite noisy. Take care to site the unit where it will not disturb you (or the neighbours!)


Refrigerant

The latest refrigerant is R410A. This is very efficient and doesn't damage the ozone layer. Look for a heat pump that uses R410A.


Outside units

Look for an unobtrusive place on a north, west, or east wall, not too close to the neighbours, and somewhere where air can circulate freely around the unit. If you live in a coastal area, make sure you get a corrosion-resistant exterior unit. Avoid south facing walls - heat pumps work better with a little sun.


Heat output

For most split systems, heat outputs might range from around 2.5kW - enough for a bedroom - to about 8kW, which should easily heat most open plan lounge/dining areas. Comfortably heating an average New Zealand home generally requires a unit in the living area and another in the bedroom area. Ducted systems can range up to around 15kW.

It's a good idea to install a unit that has a little bigger capacity than the volume of the space you need to heat. Do this and your heat pump will run more efficiently. Contact us to work out your requirements. A poorly insulated home would need a heat pump with a high output to maintain a comfortable temperature. You'd be better off fixing up the insulation first.

Please contact us to discuss your Air Conditioning needs, alternatively for a free no obligation quote you can fill in the quote form and we will be in touch.

 
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