Gas heating

You can heat your home with natural gas or liquefied petroleum gas (LPG) from bottles or piped into your house from gas mains.

Benefits of gas heating

  • Gas creates fast, convenient and easily controlled heat.
  • If you already have appliances running on gas it makes more economic sense – as you’re already paying the fixed charges for gas supply.
  • Gas is the cleanest burning, lowest emission fossil fuel - though it still emits more carbon dioxide than renewable sources of energy.
  • Modern gas heaters are generally quite efficient - so cheap to run.
  • Heater flues for gas fires can be installed almost anywhere in your home - they can be run out of the house horizontally or vertically, so they don't need to be on an outside wall.

Choosing a gas heater

  • Choose a flued gas heater - unflued gas heaters emit water vapour, nitrogen dioxide and carbon monoxide directly into your home. This can make your house damp and harm your health if there isn't enough fresh air ventilation. 
  • Check the efficiency - we recommend choosing an ENERGY STAR® qualified gas space heater or fireplace.
  • Look for a condensing gas heater - condensing gas heaters are more efficient and cheaper to run because they extract as much heat as possible from the flue gas.
  • Avoid decorative heaters - they are more inefficient than standard gas heaters so often cost a lot to run and do little to heat your home.

Installing gas heaters

  • Fans - many modern gas heaters need mains electricity for ignition and to run internal fans.
  • Building consent - you don’t need a building consent to install a gas heater. If you’re putting in a building consent for other work at the same time as installing a gas heater, you will need to specifically state that a building consent is not being sought for the gas heater.
  • Registered gasfitters - you must have a Registered Gasfitter install your gas heater, and you need a Gas Certificate for the installation. You also need to use a Registered Electrician for any electrical work and get an Electrical Certificate of Compliance issued (if required).

Gas installations and appliances - Energy Safety website 

Find an LPG filler in your area - LPG Association website

Unflued gas heaters and portable LPG heaters

Unflued gas heaters, including portable LPG heaters, don’t have vents or chimneys to carry away emissions like water vapour, nitrogen dioxide and carbon monoxide. These emissions can make your house damp and harm your health if there isn't enough fresh air ventilation. Portable LPG heaters can also be a fire risk.

We advise against using unflued gas heaters - if you do use one, keep at least one window open to allow fresh air to enter the room and waste gases to escape. Never use them in bedrooms.

Portable LPG heaters are also the most expensive form of heating (except for some open fires). If you can’t afford an effective, fixed heating option, consider portable electric heaters. They’re cheap to buy, more energy efficient and much safer to run than portable LPG heaters.

Unflued gas heaters and your health - Ministry of Health website

 Electric heaters