The Process of Installing a Heat Pump: An End-to-End Guide for Wellington Homeowners

In this article, we explore the process of installing a heat pump from start to finish, so you can feel comfortable and confident knowing what’s going on behind the scenes when it comes to the assessment, supply and installation of your heat pump.

Heat pumps are a great, energy efficient way to warm your home during winter and keep your living space cool during summer. As well as serving this dual purpose, they are incredibly energy efficient and promote great airflow with reduced humidity throughout your home. Unlike traditional heaters that generate their own heat, heat pumps gather energy from the outside air around them and transfer that energy though a refrigerant that changes from a liquid to gas state to heat a coil which air moves over to heat your home.

Looking for an air conditioner in Wellington? When a heat pump is set to cooling mode, the same process reverses to extract indoor heat and release it outside like an air conditioner. This means you get extra bang for your buck and can use the system year-round.


1. Get in Touch & Get a Free Heat Pump Quote

Once you’ve reached out to us by phone or on our website, we’ll get in touch with you to lock in a time for a free home assessment to assess which type of heat pump/s will suit your living space best.


2. Free In-Home Assessment & Quote

The team at Sustainability Trust offers free heat pump quotes for your home. Depending on which area you live in and when your house was built, you might be eligible for a discount under the Warmer Kiwi Homes programme! Sustainability Trust is a registered provider of these government subsidies, so if you are eligible for a discount, we’ll let you know. 

The free quote consists of an in-home assessment, where our expert heat pump installation team assesses your property to figure out exactly what you need. This step ensures your heat pump heater is perfectly sized. Too small? It won’t keep up. Too big? It’ll be inefficient. Just right? Comfort (and wallet) heaven. After your assessment, you’ll then receive a final quote outlining your system options, installation costs and timeline.

When assessing, our heat pump installers look at:

  • Access requirements

  • Room size and layout

  • Insulation levels

  • Window placement and sun exposure

  • How you use your space

  • Your budget and any desired brands


3. Choosing Your Heat Pump System

Now for the fun part–choosing your system. Our assessors work with a variety of trusted, well-known brands such as Fujitsu heat pumps, Mitsubishi heat pumps, plus Daikin and Hitachi models. Your assessor can help you compare features like energy efficiency, noise levels and smart controls. They can also help you pick the perfect colour to match your decor!

Depending on your home and goals, your installer may recommend:

  • A wall-mounted heat pump air conditioner for single rooms

  • A floor-mounted console if wall space is not available

A ducted system for full-home comfort


4. Booking Your Heat Pump Installation

Once you’ve chosen your system and confirmed your quote with a 50% deposit (unless you’re fully funded), your heat pump installation is booked in with our team. Most standard installs in Wellington can be completed in half a day ensuring a quick, tidy install with minimal disruption. Wait times vary from about one week during the summer, to up to six weeks in the winter–so it pays to book in as soon as you’re keen.


5. Installation of Your Heat Pump

Installation day is where everything comes together. By the end of the day, your new heat pump will be up and running, ready to heat or cool your home at the touch of a button.

During installation, your heat pump installers will:

  1. Mount the indoor unit 

  2. Install the outdoor unit in a well-ventilated spot

  3. Connect refrigerant piping and wiring between the two units

  4. Test the system to ensure it’s running perfectly


6. System Walkthrough & Handover

Once installed, your installer will walk you through how to use your new system. This includes a basic guide on how to use the remote control:how to set temperatures, switch between heating and cooling modes, set timers and basic maintenance tips for your heat pump. Don’t be afraid to ask questions here–it’s your chance to get the most out of your heat pump air conditioner from day one.


Like any appliance, your heat pump performs best with a little care. Regular cleaning of filters and occasional servicing will keep it running efficiently for years to come. Our installation team also offers ongoing support and servicing, so if anything comes up, you’ve got a team to call. We send out annual reminders about professional servicing with a bunch of handy tips for cleaning it yourself between services. All of our heat pump brands also come with a product warranty which will be handed over during the system walkthrough. 

Installing a heat pump is one of the easiest ways to improve comfort, reduce energy bills and modernise your home. They’re also kinder to the environment than fossil fuel appliances, super efficient and last a long time. From the initial quote to the final switch-on, the process is simple when you’re working with experienced heat pump installers in Wellington.

Keen to get a heat pump installed? Get a free quote from our awesome heat pump installation team by clicking the button below.

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How to Choose the Best Heat Pump and Heat Pump Supplier for Your Home