Types of heater

How you use a room will help you to decide the type of heater that’s most suitable. For larger rooms you want to heat regularly, like a living room, it’s worth paying a bit more upfront for a fixed heater with lower running costs and more heat output than an electric heater.

This could be a modern wood or wood-pellet burner, an ENERGY STAR qualified heat pump, or an ENERGY STAR qualified flued gas heater. Electric heaters may be enough for smaller rooms and rooms you only heat occasionally, like bedrooms - they’re cheap to buy but more expensive to run.

Heat pumps

Good for:

Be aware that:

  • low running costs (when you use them properly)
  • producing instant heat
  • convenience - you can control the temperature with the thermostat and use the timer.
  •  they must be sized correctly - for the space and the climate - to work well (if you live in a colder area, ask the supplier to size the heat pump based on its low temperature performance)
  • some are a lot more efficient than others - look for an ENERGY STAR® qualified model
  • they won't work during a power cut.

 Heat pumps - more information

Modern woodburners

Good for:

Be aware that:

  • low running costs, especially if you have access to free or cheap firewood
  • the environment - they produce very little pollution and use renewable wood energy
  • heating large spaces
  • heating hot water in winter through a wetback system.
  • firewood must be dry to burn cleanly and efficiently, so you need to plan ahead and store it undercover, ideally for at least 12 months
  • you need a building consent to install one and - unless your property is larger than two hectares - you need to use a woodburner on the approved list from the Ministry for the Environment.

Ministry for the Environment's list of approved wood burners

 Modern woodburners - more information

Wood pellet burners

Good for:

Be aware that:

  • the environment - the pellets are made from waste products and burn cleanly
  • heat control (better than a wood burner)
  • heating large spaces
  • heating hot water in winter through a wetback system.
  • they won't work if your electricity isn't working (they use a small amount of electricity)
  • you cannot burn firewood in a pellet burner
  • pellet prices vary greatly across the country – check prices in your area first
  • you need a building consent to install one
  • only authorised burners can be used in areas with poor air quality

 Wood pellet burner - more information

Flued gas (natural or LPG) heaters or fireplaces

Good for:

Be aware that:

  • convenience - you can control the temperature with the thermostat and use the timer
  • heating large spaces.
  • you will have to pay a fixed charge for reticulated gas supply (if you don't already)
  • running costs are relatively high if you use LPG bottles
  • while burning gas is relatively clean, the greenhouse gas emissions contribute to climate change
  • you must have your gas heater installed by a registered gas fitter.

 Gas heating - more information

Electric heaters

Good for:

Be aware that:

  • heating smaller spaces, like bedrooms
  • very cheap to buy.
  • they are more expensive to run than most other heating options
  • their heat output is low compared to most other heater types
  • all electric heaters are equally efficient as they convert all the electricity they use into useful heat
  • there are different types (radiant, convection, fan) that deliver heat in different ways to suit different situations
  • many have built-in thermostats, but generally they aren't very accurate.

 Electric heating - more information

Central heating

Good for:

Be aware that:

  • providing heating for your entire house
  • convenience - you can control the temperature with the thermostat and use the timer
  • zoning - many are zone-controlled so you can control the temperature in different parts of the home.

 

  • Can be expensive to install
  • heat can be supplied by a range of heating systems for example gas, wood pellet or heat pump
  • it’s worth choosing a system that has an individual thermostat for each room
  • can be very expensive to run if your house isn't well insulated or is draughty.

Unflued gas (natural or LPG) heaters, including portable gas heaters

Good for:

Be aware that:

  • back-up heating during power cuts, if your normal heating relies on electricity to operate.
  • unflued portable gas heaters are the most expensive form of heating (except for some open fires)
  • there are health risks - it will pollute air with toxic gases and large amounts of water vapour, so you must keep at least one window open when it’s in use and never use in bedrooms
  • they can make your home damp and mouldy
  • portable gas heaters can be a fire risk, as anything too close can quickly catch alight.