Whanganui's mild climate means a standard heat pump works well year-round. Heating demand is moderate by NZ standards, making heat pumps a cost-effective choice for both new and existing Whanganui homes. Here's what heat pump installation costs in Whanganui in 2026.
Whanganui Heat Pump Installation Costs 2026
| Service | Whanganui typical cost |
|---|---|
| Single split system (supply + install) | $3,000–$5,300 |
| Multi-split 2 indoor units (supply + install) | $5,000–$10,000 |
| Ducted heat pump (whole home) | $12,000–$28,000 |
| Heat pump service / regas | $170–$460 |
| Relocate existing unit | $460–$1,050 |
All prices GST inclusive. Broadly regional.
Whanganui Heat Pump Selection
Whanganui's mild climate means a standard heat pump works well year-round. Heating demand is moderate by NZ standards, making heat pumps a cost-effective choice for both new and existing Whanganui homes.
Sizing for Whanganui
| Room size | Recommended kW |
|---|---|
| Bedroom / small room (<15m²) | 2.0–2.5 kW |
| Medium living (15–30m²) | 2.5–4.0 kW |
| Large open plan (30–60m²) | 5.0–7.0 kW |
| Very large (60m²+) | 7.0–12.0 kW |
A good installer will assess your room, insulation, and window area before recommending a size.
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Related: Heat Pump Cost NZ | Insulation Installers Whanganui