Auckland homes and a ducted system
Villas and bungalows
Auckland Council's history of the city's urban form says villas were common in the early 20th century, and Californian bungalows and Spanish mission houses took off in the 1920s. In these, a ducted heat pump specialist will want to see the roof space, the insulation the ducts will run through, and where the indoor unit can sit.
Special Character Areas
In the Unitary Plan's Special Character Areas, among them Herne Bay, Mount Eden and St Heliers, restoration and repair is permitted but external alterations or additions are restricted discretionary. Ask the council whether the outdoor unit or any new outside grille counts.
A city adding townhouses
Apartments, units and townhouses rose from 19.2% of Auckland's occupied homes in 2018 to 27.9% in 2023. These are usually unit titles, and Tenancy Services gives the example of a body corporate rule against outdoor units on common property without its consent.
Cooling is part of the job
Henderson River Park averages 205 cooling degree-days a year against 1,250 heating ones, and NIWA says cooling demand peaks in summer. A ducted system that cools bedrooms on warm nights should be sized and checked for both.
Damp air still has to go somewhere
BRANZ says ducted heat pumps usually recirculate the air already in the house, with no fresh air coming in. With 23.1% of people in the Auckland health district living in damp homes in 2023, plan ventilation as a separate job.
What makes a ducted job bigger or smaller in Auckland
The roof space sets the scale. A tall villa roof with room to crawl lets the ducts run short and straight. A low-pitched bungalow, a skillion extension or a two-storey townhouse can force longer runs, ducts under the floor, or a rethink towards a multi-room heat pump. Our ducted heat pumps page explains how the system works.
Insulation matters as much as the ducts. BRANZ says ducts that are overlong, full of bends or routed through uninsulated space can lose more than 30% of the heating energy, and that a heat pump doesn't replace good insulation. If the ceiling insulation is thin or missing, deal with that in the same project.
Older switchboards can add work. If the electrician has to change the main switchboard, main cable or main earth, the EWRB says a licensed electrical inspector must also check it, which your electrician arranges.
Then there's the outdoor unit. The Unitary Plan's residential night limit is 40dB LAeq, measured inside the neighbouring site. EECA says the energy label shows only an outdoor noise figure for ducted units, and showing noise at all is optional here, so ask for it in writing.
What to ask a ducted installer in Auckland
- Have you been up in my roof space, and where will the indoor unit sit?
- Will any duct run through uninsulated space, and how long is the longest run?
- What are the heating capacities at 7 and 2 degrees, and the cooling capacity at 35?
- Where will the outdoor unit go, and what's its noise figure?
- Does anything on the outside need council or body corporate approval?
- How will a technician reach the indoor unit and return air filter later?
What we'd do
Our view on ducted in Auckland
In a villa or bungalow with a roomy roof space and decent ceiling insulation, ducted is a tidy way to heat and cool the whole house. In a townhouse, or under a cramped ceiling, we'd get a multi-room quote as well and compare the two. Wherever it is, we'd want the installer in the roof space before anything is quoted, and the outdoor unit's spot agreed with the neighbours' bedrooms in mind.