A 7.1 kW heat pump in your lounge is excellent at heating your lounge. The bedrooms down the hallway? Two doors and a temperature drop of 5–8 °C, even with the lounge unit cranking.
NZ research from BRANZ shows that whole-of-house heating from a single high-wall split typically achieves around 16 °C in the bedrooms when the lounge is at 22 °C. WHO recommends 18 °C minimum in living and sleeping spaces.
When does a single unit work?
- Open-plan, single-storey homes under 90 m² with very good insulation
- You don't mind the bedrooms being cooler
- You're using a floor console or ducted system, not a high-wall
When you really need multiple zones
- 3+ bedrooms you actually want warm
- Two-storey homes
- Old villas with internal walls and corridors
Use our Whole House mode to see whether you need one big unit, several singles or a multi-split.