Heat pumps for Oakura and the coast

Oakura and Okato sit on the western coast with the Tasman Sea in front of them and the mountain behind. The prevailing westerly runs straight off open water, so salt reaches houses well back from the beach, and the same wind brings the rain that makes this one of the wetter parts of the country. Neither stops a heat pump working well. Both change which one goes in and where its outdoor half sits.

Salt travels further here than people expect

The outdoor unit is a copper coil threaded through hundreds of thin aluminium fins, and that fin stack is what salt attacks. It settles, holds moisture against the metal, and corrodes it until the fins go chalky and break away from the tube. The unit looks fine from the outside long after it has stopped shedding heat properly.

On an open west coast the salt does not stay at the beach. A steady onshore westerly carries it inland, so houses a kilometre or more back from the water at Oakura and across the Okato farmland are worth treating as coastal even when they feel sheltered.

A corrosion-resistant model is the sensible default along here. Ask what the fin treatment is, what the warranty says about coastal installations, and what the mounting brackets are made of, because painted steel does not last in this air.

Wind, and where the outdoor unit actually goes

Salt gets the attention but the wind matters too. A unit bolted to the seaward wall is buffeted constantly, which is hard on the fan and can make it audible indoors in a way a sheltered unit never is.

The eastern or landward side of the house is nearly always available, and the extra pipework through the ceiling costs far less than replacing the unit early. Under the eaves beats out in the open, because rain rinses salt off while wind-driven spray only deposits more. Up off the ground on a stand keeps it clear of splash and lets air move underneath.

A gentle freshwater rinse of the coil every few months does more for its life than anything else you can do. A garden hose from the side, never a water blaster, which folds the fins flat. That sort of upkeep is what heat pump servicing covers.

Wet, mild, and damper than it is cold

This coast does not get hard frosts. The sea keeps it mild and the westerlies keep it wet, and damp is the problem worth solving rather than cold. Houses here get condensation on the windows, mould in the corners of rooms that are never heated, and that smell in a hallway that never quite dries out.

A heat pump handles that well, because warmer air holds moisture instead of dropping it on the coldest surface in the room. Run steadily at a modest setting it dries a house out across a season in a way that heating for two hours an evening never does.

What it will not fix is a wet subfloor, a blocked gutter or a bathroom with no extractor. Ground moisture cover and a bit of ventilation alongside it do more together than either does alone.

Beach houses that became permanent homes

A lot of Oakura and the settlements along the coast started as baches. They were built light, added to over the years, and lived in year round by people who never intended to. Insulation is patchy and sometimes varies room to room in the same house.

That makes an on-site look worth more than a calculator, because what these houses lose has little to do with their floor area. The sizing calculator is still a fair starting point, the installation cost page has the ranges, and the heat pump installation page covers how the day runs.

Where this covers

• Oakura
• Okato

Elsewhere in Taranaki? Your local installer also covers New Plymouth city, Bell Block and Waitara and Inglewood and inland Taranaki. The full list is on the areas we serve page, or get a free quote for your place.