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Guide to energy efficient heaters in NZ

 

With energy costs on everyone’s mind, finding energy efficient heaters that strike a balance between keeping you warm and keeping bills down can be a real game-changer. While all electric resistance heaters (ceramic, oil, radiant, convector, fan) are essentially 100% efficient at converting electricity into heat, some options are better than others when it comes to how they use that energy, especially if you’re mindful of usage patterns. Below, we’ll delve into the best ways to stay toasty in New Zealand’s cooler months without seeing your power bill skyrocket.

Choose the right heater for your room

Choosing the right KW heater ensures your room heats up efficiently without wasting electricity. A heater that's too small will struggle to warm the space, while one that's too large will unnecessarily increase your energy bills.
Measure your room (length × width × height) to find the volume.
Allow about 44 watts per cubic metre of room volume.
Add 10% if your room has large windows. Add another 10–20% if your room has partial or no insulation.

For a bedroom, multiply by 1.2, for a lounge, multiply by 1.5, for smaller areas multiply by 0.8.

Example:
A well-insulated bedroom 3.2m × 3m × 2.4m high = 23.04 cubic metres. Multiply by 44 to get 1013 watts, then by 1.2 for bedroom = 1216 watts (1.2 KW).

Heat Pumps

Heat pumps are widely recognised as one of the most energy-efficient ways to heat your home and are the most low cost energy efficient heaters for large rooms. They work by extracting heat from outside air and transferring it indoors, making them significantly more efficient than conventional electric heaters. However, despite their advantages, installing a heat pump isn't always feasible for everyone. Factors such as rental restrictions, the high initial installation cost, home layout, and building constraints can limit your options. If you fall into this category, there are still excellent electric heater alternatives available that provide warmth effectively while keeping running costs manageable.

This guide focuses on those practical alternatives, helping you choose the best electric heater type to match your space, usage patterns, and budget, ensuring you stay warm without overspending on electricity.

 

Oil Heaters: Best for Steady, Economical Room Heat

  • Heat retention: Once the internal oil is warmed, the heater continues radiating warmth even on a lower setting.
  • Quiet operation: Ideal if you’re sensitive to fan noise or want to avoid too much distraction.
  • Safe & low maintenance: Modern oil heaters often have tip-over protection and thermostatic control.

Saving on bills:
Rather than cycling it on and off, set the built-in thermostat to a moderate temperature (roughly 18–20°C) and let it run steadily. This gentle, continuous heat uses less energy than blasting a room hot, turning the heater off, and repeating the process. Briscoes offers various oil heaters with digital controls. Perfect for fuss-free, cost-effective warming.

 

Ceramic & Radiant Heaters: Spot Heating

Ceramic Heaters

  • Fast warm-up: Heat up quickly, making them handy for short bursts of heat.
  • Fan-assisted: Distributes warm air around small to medium spaces.
  • Easy to move: Many models come with handles and are lightweight.


Radiant Heaters

  • Direct heat: Fantastic if you’re seated nearby and don’t need to warm an entire room.
  • No Fan Noise: Usually quiet, as they rely on infrared warmth

Saving on Bills:
Use them only when you’re in the room. They lose much of their cost-effectiveness if left on when nobody’s around. Briscoes has compact ceramic and radiant heaters with thermostats and timers for better energy control.

 

Convector & Fan Heaters: Short, Sharp Blasts of Warmth

Convector Heaters

  • Gentle warmth: Great for smaller or well-insulated rooms, with near-silent operation.
  • Wall-mount options: Slim-line models can be installed discreetly.


Fan Heaters

  • Immediate heat: Switch on and you’ll feel the warmth almost straight away.
  • Budget-friendly: Often cheaper to purchase, though their rapid heat might tempt you to leave them running longer.

Saving on Bills:
These are best for quick fixes, like warming a chilly bathroom or a study for a short time. If you’re running them for hours, you’ll notice it on your next electricity bill. Instead, limit usage to when you need immediate heat, then switch them off once the room is comfortable. Check out Briscoes’ range of fan heaters and convector heaters.

 

Electric Blankets: The Ultimate Low-Bill Hero

  • Direct personal warmth: Instead of heating the entire bedroom, you only warm your bed.

  • Low power usage: Great for preheating before you climb in, then switch off or use a low setting.

Ideal for winter nights: An electric blanket can be a real luxury when the temperature dips.

Pro Tip:
Look for electric blankets at Briscoes that feature timers or dual controls, so each side of the bed can be set to a personal preference. This targeted approach to heating drastically reduces power consumption compared to heating a large room.

 

Tips & Tricks to Maximise Savings

  1. Zone heating: Rather than heating your entire house, focus on the rooms you actually use. Close doors to contain the warmth.

  2. Use a thermostat: Whether on an oil heater or a fan heater with a built-in thermostat, set a sensible temperature. Constantly cranking heat up and down can cause spikes in energy usage.

  3. Timers & eco-modes: Many heaters from Briscoes come with timers or eco-settings. Use these features to prevent accidentally running the heater all night or while you’re out.

  4. Insulation & draught-proofing: Even the best heater will struggle if your home is losing heat through gaps and thin windows. Adding door draught stoppers or thicker curtains can make a surprising difference.

Layer up: The simplest way to stay warm without ramping up power usage? Put on cosy socks, a jumper, or snuggle up under a thick blanket.

Which Heater Is Right for You?

Lowest Ongoing Cost: Electric Blankets

  • Warm just the bed, not the room

  • Cheap to run

Best heater for bedroom: Oil Heaters

  • Retain heat well

  • Excellent for moderate, continuous warmth

  • Quiet and easy to maintain

Short-Burst, Focused Heating: Ceramic or Radiant Heaters

  • Quick and spot-focused

  • Perfect if you’re only in one place for a little while

Occasional Rapid Heating: Fan Heaters

  • Heat up a small space swiftly

  • Best in short intervals to avoid big bills

Convector Heaters

  • Low-noise, subtle warming

  • Good for smaller, well-insulated rooms

Shop Smart at Briscoes

Keeping cosy shouldn’t mean dreading your next power bill. The key is choosing the heater (or blanket!) that suits both your lifestyle and your space. At Briscoes, you’ll find a wide array of oil heaters, ceramic heaters, radiant models, fan and convector options, and of course, electric blankets. Chat with our team in-store or browse online to compare different specs and styles before making your choice.

 

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