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A heat pump is the most efficient way to heat a NZ home, but the install isn't just mounting the units — there's an electrical side that matters for safety and performance. Here's what's involved.
Published 2026-06-01 · Rotorua Electricians
Most heat pumps run on a dedicated circuit from the switchboard rather than sharing with power points. This stops nuisance tripping and handles the start-up load. A small unit may run off an existing suitable circuit, but larger or ducted systems almost always need their own — which an electrician runs and certifies.
Adding a heat pump (and maybe an EV charger later) can push an older switchboard to its limit. If your board is full or still has ceramic fuses, you may need an upgrade first. We check this before install so you're not surprised — and in Rotorua we also check for the geothermal corrosion that ages older boards.
A heat pump runs for hours. Undersized cable or a loose connection means heat, inefficiency and early failure. Proper wiring on a correctly sized, protected circuit means it runs reliably and safely for years. The installer often does the mounting and refrigerant; we handle the electrical side and certification.
FAQ
Often a dedicated circuit is needed. We check your switchboard capacity and existing wiring first, and only recommend an upgrade if it's genuinely required.
Yes — we run and certify the dedicated circuit and check switchboard capacity, working in with your heat pump installer.
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