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Best Heat Pump Installers in Hamilton

We assessed 20 heat pump installers in Hamilton and ranked the top 5 on their public review record: rating quality, review volume and how recent the reviews are. The 10 listed below hold 1,305 Google reviews between them. No business can pay for a place in these rankings. Last updated 18 August 2026. How we rank →

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Before you hire

Connecting a heat pump to mains power is prescribed electrical work, so confirm your installer is listed on the Electrical Workers Registration Board register before booking. Refrigerant handling is covered by industry certification rather than a government licence, so ask what qualification the technician holds. Ask installers which brands they are authorised to install, what the manufacturer warranty covers, and what the running cost estimate is for your space.

Top 5 Heat Pump Installers in Hamilton

The top 5 heat pump installers in Hamilton are Goldstar Heat Pumps, Superheat, Oxygen Air, Eastside Refrigeration, and GreenSide Energy Solutions, ranked by Top5 score. Scroll for our take on each, plus what to ask before you hire.

  • 1

    Goldstar Heat Pumps

    ★ 4.9 484 reviews +16 Top5 Score 188 +2
    5★ 455 4★ 22 3★ 3 1★ 4

    Goldstar Heat Pumps covers single-unit wall installations, multi-unit residential jobs, and ducted heating systems, adapting on the day when unusual construction throws up surprises like limited roof space. Crews communicate changes as they go, leave sites spotless, and include a walkthrough of the remote and settings before they pack up.

    Reviews most often describe: Multi-unit installs and complex or unusual homes

    • ✓ Keeps customers informed when install plans change mid-job
    • ✓ Completes multi-heat-pump installs across a whole home in one day
    • ✓ Repeat customers return across multiple properties over many years

    location_on 18b Haig Street, Frankton, Hamilton

    map Map Is this your business?
  • 2

    Superheat Electrical and Air-Conditioning

    ★ 5.0 123 reviews +2 Top5 Score 168 -1
    5★ 123

    Superheat coordinates split-system wall units, multi-head installations, and ducted Mitsubishi systems, with the admin team scoping options and tailoring quotes before any work begins. On the day, crews tackle genuinely difficult jobs like plaster walls and awkward cable runs, then follow up after completion to confirm everything is running well.

    Reviews most often describe: Clients who need thorough pre-install guidance and follow-up

    • ✓ Quotes include multiple models to compare before committing to one
    • ✓ Crews leave sites tidy and clean up fully after installation
    • ✓ Weekend installs available when weekday scheduling is difficult

    location_on 38C Pukete Road, St Andrews, Hamilton

    map Map Is this your business?
  • 3

    Oxygen Air

    ★ 4.6 197 reviews +4 Top5 Score 161 -5
    5★ 164 4★ 18 3★ 3 2★ 1 1★ 11

    Oxygen Air gets multi-room ducted systems and large multi-unit heat pump jobs finished in a single day, with quotes that walk through several options at different price points rather than pushing one direction. Sales staff like Nathan and Bevan are noted for giving honest, pressure-free advice, and install crews regularly stay behind to test airflow, adjust settings, and explain controls before leaving.

    Reviews most often describe: Large ducted installs completed efficiently in one day

    • ✓ Ducted installs for multiple bedrooms completed within one day
    • ✓ Sales reps quote several options across different budgets without upselling
    • ✓ Install crew tests airflow and explains controls before leaving site

    location_on Unit B/77 Tasman Road, Te Rapa, Hamilton

    map Map Is this your business?
  • 4

    Eastside Refrigeration Ltd

    ★ 4.6 84 reviews +9 Top5 Score 161 +3
    5★ 72 4★ 2 3★ 4 1★ 6

    Eastside Refrigeration keeps heat pumps running through new installations, annual servicing, and ongoing maintenance, with several customers staying with them across 19 to 20 years. Their admin team proactively contacts clients to schedule regular servicing, and installers like Fernando handle challenging fit requirements without fuss, tidying up and explaining controls before leaving.

    Reviews most often describe: Long-term servicing and maintenance of existing heat pumps

    • ✓ Admin team contacts clients to schedule annual servicing appointments
    • ✓ Technicians explain maintenance and optimal use tips on the day
    • ✓ Invoices arrive exactly as quoted with no surprise charges

    location_on 29 Gilchrist Street, Avalon, Hamilton

    map Map Is this your business?
  • 5

    GreenSide Energy Solutions - Waikato

    ★ 4.7 69 reviews +6 Top5 Score 156 +1
    5★ 61 4★ 3 1★ 5

    GreenSide Energy Solutions coordinates heat pump supply, installation, and wall-mount bracketing through a dedicated office team who handle scheduling, deposits, and install dates as a connected process. Reviewers note jobs moving from consultation to completion in under two weeks, with installers like Faizal and Rob doing thorough on-site assessments before crews arrive to carry out the work.

    Reviews most often describe: Straightforward installs booked and completed within weeks

    • ✓ Moves from initial quote to completed install within two weeks
    • ✓ Dedicated office staff coordinate scheduling and deposit steps directly
    • ✓ Installers introduce themselves on arrival and work quickly on site

    location_on 453 Anglesea Street, Hamilton Central, Hamilton

    map Map Is this your business?

Before you hire a heat pump installer in Hamilton

Drawn from 189 customer reviews collected for this page. The first answer is what it costs.

What does heat pump installation typically cost in New Zealand? expand_more

A standard single split-system heat pump, covering supply and installation, runs between $2,000 and $4,500 for a single room or living area. Multi-head systems serving several rooms typically cost between $5,000 and $12,000 or more depending on complexity. Ducted systems for whole-home heating sit at the higher end, with some Hamilton installs reviewed here running into the $20,000 range. The Warmer Kiwi Homes programme, administered by EECA (Energy Efficiency and Conservation Authority), can cover up to 80% of costs for eligible low-income homeowners, so check eligibility before accepting any quote at face value.

Full heat pump installation cost guide, with sources

How do I know if a heat pump installer is qualified and certified? expand_more

The most important check is electrical: connecting a heat pump to mains power is prescribed electrical work under the Electricity Act 1992, so the person doing it must be registered with the Electrical Workers Registration Board (EWRB) and hold a current annual practising licence, both of which you can verify on the EWRB public register. Ask the installer for their EWRB registration number before work begins, not after. On refrigerant handling, there is no government occupational licence for air conditioning technicians in New Zealand, so do not expect one; instead, ask what industry certification the technician holds through the Refrigerant Licence Trust Board, which is the recognised trade credential in this space. Also ask which brands the installer is manufacturer-accredited to install, because fitting a unit outside that accreditation can void the product warranty regardless of how good the workmanship looks.

How do I know if the heat pump I'm being sold is the right size for my room? expand_more

A legitimate installer will carry out a heat load calculation that accounts for your room's floor area, ceiling height, insulation, window area, and your local climate before recommending any unit size. As a rough guide, budget around 100 to 125 watts of heating capacity per square metre, meaning a small bedroom of 20 to 30 square metres suits a 3 kW unit, while a larger open-plan living area of 50 to 70 square metres needs 5 to 7 kW. One installer reviewed here took time to assess the space and explain options before quoting, which is the standard you should expect; if a sales rep quotes on the spot without measuring or asking about your insulation, treat that as a warning sign.

What are the warning signs of a heat pump installer you shouldn't hire? expand_more
  • –Refuses or fumbles when asked for an EWRB registration number, which is a legal requirement for the electrical connection work.
  • –Cannot explain what refrigerant handling qualification the technician holds, which points to gaps in trade competence.
  • –Sales rep agrees to specific installation details such as unit placement or wall mounts, but the install crew arrives with no knowledge of those agreements.
  • –After-sales communication drops off once the invoice is paid, with ignored calls, unanswered emails, and repeated no-shows when a fault needs fixing.
  • –No-shows or last-minute cancellations on installation day with no proactive contact, leaving you to chase them.
  • –Damage to your property during installation, such as cut timber or disturbed wiring, with no prior disclosure and no follow-up when you raise it.
What should you ask before hiring a heat pump installer? expand_more
  • –Ask for the installer's EWRB registration number and check it on the Electrical Workers Registration Board public register before signing anything.
  • –Ask what refrigerant handling qualification the technician holds, since this is an industry credential rather than a government licence, and a blank answer is a red flag.
  • –Confirm which brands the installer is manufacturer-accredited to fit, as installing outside that accreditation can affect your product warranty.
  • –If you are applying for a Warmer Kiwi Homes subsidy through the EECA (Energy Efficiency and Conservation Authority), confirm the installer is accredited under that programme before proceeding.
  • –Ask exactly how the installer determines the right unit size, and expect a reference to a proper heat load calculation covering your room dimensions, insulation, and ceiling height.
  • –Get the quote itemised so you can confirm it covers the indoor unit, outdoor unit, all pipework, electrical connection, and a test run, and ask separately what the workmanship warranty covers and for how long.

Heat Pump Installers ranked 6 to 10 in Hamilton

They scored below the top 5 on the same public review record.

  • 6

    HRV Waikato

    ★ 4.1 181 reviews +5 Top5 Score 155 +5
    5★ 122 4★ 17 3★ 8 2★ 7 1★ 27

    HRV Waikato installs combined heat pump and home ventilation systems, with installation crews like Brijesh and Will testing the system on completion and keeping customers updated throughout the job. Where communication breaks down, the team has shown willingness to reach out, apologise, and re-engage to get things back on track.

    Reviews most often describe: Whole-home ventilation paired with heat pump installation

    • ✓ Installers test and confirm system function before leaving the site
    • ✓ Customers report noticeably drier, warmer homes after installation
    • ✓ Team follows up with clients when early service interactions go wrong

    location_on 13 Kahu Crescent, Te Rapa Park, Hamilton

    map Map Is this your business?
  • 7

    Aeon Energy Solutions

    ↑ 1
    ★ 4.8 51 reviews +6 Top5 Score 152 +3
    5★ 47 4★ 2 1★ 2

    Aeon Energy Solutions installs heat pumps and insulation across residential properties, including repeat work across multiple sites for the same client. When an issue surfaces after installation, Matt and the team send someone back within the week to sort it, at no additional cost to the customer.

    Reviews most often describe: Multi-property landlords wanting heat pumps and insulation bundled

    • ✓ Turns up exactly when scheduled with no last-minute changes
    • ✓ Completes heat pump and insulation installs across multiple properties
    • ✓ Sends staff back within the week to resolve post-install issues

    location_on 6A Breckons Avenue, Nawton, Hamilton

    map Map Is this your business?
  • 8

    OneAir | Waikato's Heat Pump Professionals

    ↓ 1
    ★ 4.8 62 reviews +3 Top5 Score 149 +1
    5★ 50 4★ 11 3★ 1

    OneAir carries out heat pump servicing across high-wall and ceiling ducted units, including multi-property runs covering several units in a single visit. Technicians like Anil and Nitel call ahead with arrival times, work through jobs without needing supervision, and flag any issues they find rather than leaving them for the customer to discover later.

    Reviews most often describe: Recurring servicing across multiple units and properties

    • ✓ Technicians call ahead with estimated arrival time before each visit
    • ✓ Services multiple units across several properties in one visit
    • ✓ Faults identified and communicated to owner during the service call
    map Map Is this your business?
  • 9

    Aircon Group Waikato

    ★ 4.8 35 reviews +6 Top5 Score 143
    5★ 32 4★ 2 1★ 1

    Aircon Group Waikato handles new heat pump installations, unit replacements, and annual servicing, with some clients relying on them across a decade or more of repeat work. Jobs are completed on schedule, with installers communicating clearly along the way and leaving sites tidy, including follow-up support after the work is done.

    Reviews most often describe: Ongoing installs, replacements, and servicing over many years

    • ✓ Installs and servicing completed on the promised date without delays
    • ✓ Communicates progress and explains problems and solutions during the job
    • ✓ Cost-effective pricing noted across both installations and ongoing servicing

    location_on 3/137 Ingram Road, Hamilton

    map Map Is this your business?
  • 10

    Hamilton Heatpump Services

    ★ 5.0 19 reviews +3 Top5 Score 142 +1
    5★ 19

    Hamilton Heatpump Services turns around heat pump servicing, fault diagnosis, and deep cleaning quickly, often completing jobs the same day a call comes in. Darin is noted for telling clients when a service is not yet needed rather than upselling, and for coordinating directly with tenants on rental properties to save landlords the back-and-forth.

    Reviews most often describe: Landlords needing honest advice and same-day servicing

    • ✓ Gives honest advice against unnecessary servicing when not needed
    • ✓ Sorts times directly with tenants on behalf of landlords
    • ✓ Affordable pricing noted across servicing, cleaning, and fault repairs

    location_on 28 Morrow Avenue, St Andrews, Hamilton

    map Map Is this your business?

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About this ranking

How are the top heat pump installers in Hamilton chosen? expand_more

We build this page from Google Maps results for heat pump installers in Hamilton. Each one is scored on its public rating and review record. Businesses outside the area, or whose reviews describe a different line of work, are left out. See how we rank for the full method.

How often are rankings updated? expand_more

Every category and city is recrawled on a rolling cycle, about once a month. This page was last checked on 18 August 2026.

Can a business pay to appear in this list? expand_more

No. Top 5 and Also Recommended positions are merit-only and cannot be purchased. Verifying a business is free. A subscription adds a website link on the card, a public profile page, and competitor and ranking history in the owner's dashboard, none of which affects ranking position. See what a subscription includes.

Why isn't my business listed? expand_more

We build this page from Google Maps results for heat pump installers in Hamilton. The usual reasons for missing out are a Google Business category that does not match, too few reviews to score near the top, or an address outside the area we cover. At the last update, the smallest review count among the 10 businesses listed here was 19. Check where you rank or read how rankings work.