Heating, cooling and ventilation for homes and businesses across Hamilton, Waikato and Auckland — designed around your property, for retrofit and new builds.
the heat of a plain electric heater, for the same power
heats in winter, cools in summer
for most single heat pumps, old unit taken away
workmanship, along with a 5-year manufacturer warranty
Delta Air supplies and installs efficient heating and cooling for bedrooms, living rooms, open-plan spaces, offices and other individual areas. We help you choose the right heat pump based on the size and layout of the space, insulation, glazing, ceiling height, location and how the room is actually used. We specialise in retrofit, replacement and new-build heat pump installations.
One indoor unit paired with one outdoor unit, providing both heating and cooling. The most popular way to condition individual rooms and open-plan areas.
Ideal for
Benefits
A lower-mounted indoor unit for situations where a high-wall unit isn't suitable, or where you simply prefer heat delivered at floor level.
Works well
Benefits
A standard electric heater turns electricity straight into heat. A heat pump moves heat from outside into the room instead, so a correctly sized unit typically gives around three times the heat for the same power, keeps working on frosty Waikato mornings, and cools in summer too.
Adding a heat pump to an existing home, or replacing an older system, takes more than picking a unit. We assess existing refrigerant pipework, drainage, electrical supply, outdoor unit location, wall construction, existing penetrations, indoor unit position, airflow and service access — then leave it clean and tidy, with your old unit taken away and disposed of.
For new homes we work with you or your builder before the internal walls and ceilings go up, planning indoor and outdoor unit positions, refrigerant pipework, drainage, HVAC electrical supply, isolators and future servicing access. Early planning makes for a much cleaner finished installation.
Our registered electrician completes the electrical work associated with the HVAC installation — dedicated circuits, isolators and associated switchboard work where required.
A ducted heat pump warms and cools the home with no wall unit in every room. A central indoor unit sits in the ceiling space, with conditioned air distributed through discreet ceiling or wall outlets. We design ducted systems for both retrofit installations and new-build projects.
Heat or cool multiple rooms from one central HVAC system.
Most equipment is hidden in the ceiling space — only outlets, the return-air grille and controls are visible.
Divide the system into zones so you control which areas receive heating or cooling.
Wall controllers, room sensors, Wi-Fi/app control, zone control and smart zoning platforms on selected systems.
The main indoor unit is generally positioned away from normal living areas.
Whole-home heating and cooling without a high-wall unit in every room.
A ducted system doesn't have to go in during construction. Where the property allows, we design and retrofit ducted heating and cooling into an existing home — assessing roof-space access, indoor unit location, duct routes, supply outlets, return-air position, zones, controller and sensor positions, outdoor unit position, condensate drainage, HVAC electrical supply and future service access.
The system is designed around your property, rather than forcing a standard layout into every home.
We work from the building plans before construction reaches final fit-off. Early HVAC planning coordinates duct routes, ceiling outlets, return-air grilles, zone dampers, controllers, room sensors, indoor unit location, access panels, outdoor unit position, condensate drainage and electrical requirements — for a more integrated, professional result.
A practical option when several rooms need heating and cooling but a fully ducted system isn't suitable. Depending on the equipment, multiple indoor units run from one outdoor system — independent comfort in several rooms, with fewer outdoor units around the property.
We won't default to a multi-room system just because several rooms need heating. We look at the property and compare individual single-split systems, multi-room systems and ducted heating and cooling. The right answer depends on home layout, number of rooms, roof-space availability, outdoor-unit space, your comfort expectations, budget and control requirements.
Heating and cooling are only part of a comfortable indoor environment. A properly designed ventilation system introduces fresh, filtered air, improves airflow and helps manage excess moisture inside the home — for existing homes and new builds alike.
Everyday living puts a lot of moisture into the air: cooking, showers, drying washing, even breathing. When it can’t get out, it settles as condensation on cold windows and walls. That leads to mould, musty smells and a home that is harder to heat, because damp air takes more energy to warm. A ventilation system moves the moist air out and brings drier, filtered air in.
The right ventilation solution depends on construction, insulation, existing moisture conditions, roof-space conditions, window performance, occupancy, how the home is heated and any existing extraction. We assess the home before recommending a final solution.
Existing homes may suit ventilation installed through available roof or ceiling spaces. We assess roof access, duct routes, outlet positions, intake locations, existing extraction and electrical requirements.
Ventilation can be considered at the early design stage, allowing better planning of duct routes, supply outlets, extract points, equipment location, external vents, electrical supply and future servicing access.
Our registered electrician completes the electrical work associated with the HVAC and ventilation equipment where required.
Modern systems do far more than turn on and off. We integrate zoning, smart controllers, room sensors and Wi-Fi control — with ducted systems and selected high-wall heat pumps.
Smart zoning for compatible ducted systems.
Integrated control and zoning for compatible Daikin ducted systems.
Not just for ducted — selected high-wall heat pumps too.
A zoned system lets different parts of the home be controlled independently — rather than conditioning every room whenever the system runs. Motorised zone dampers control the airflow delivered to each area: living and dining, kitchen, bedrooms, master bedroom, upstairs, downstairs, home office or guest rooms.
Selected zoning systems use individual room sensors, so the system receives temperature information from different areas rather than relying on one central controller. The level of individual room control available depends on the HVAC system and zoning platform selected.
More zones doesn't automatically mean a better system. We design the zone layout around how your home is actually used — a day zone for living, dining and kitchen; night zones for bedrooms; a separate master zone; and occasional-use areas like a guest room or office. Good zoning makes the system easier to use while improving comfort.
Air conditioning for offices, retail spaces, commercial buildings and other business environments — new installations, equipment replacement, system upgrades, ventilation and ongoing support.
Many commercial projects involve replacing or upgrading existing equipment. We assess the existing system, required capacity, equipment positioning, pipework, ductwork, electrical and control requirements, access and serviceability — for a practical solution suited to how the building is actually used.
For new builds and larger renovations we coordinate HVAC with the wider construction project — equipment locations, ductwork, pipework, ventilation, controls, electrical requirements, commissioning and future maintenance access.
A yearly service, ideally before winter, keeps a heat pump running efficiently and catches small problems before they become breakdowns. Book sooner if it smells musty, drips, or isn’t heating like it used to. We service and repair all major brands.
You can keep it running well yourself. Switch it off, lift the front cover, slide out the filters, vacuum or rinse them in lukewarm water, let them dry fully and refit them. Do this every few weeks while it’s working hard in winter or summer, and keep plants and clutter clear of the outdoor unit. Leave the coils, drain and electrical checks to us at the yearly service.
High-wall heat pumps, floor consoles, multi-room systems, ducted systems, selected ventilation systems and associated controls, all major brands.
For suitable commercial sites we provide scheduled servicing, equipment inspection, filter maintenance, drainage checks, performance checks, fault assessment and maintenance reporting where required.
GuidesHeat pump repairs in HamiltonReplacing an old heat pump
Five steps from first visit to years of comfort. No surprises on price, and no mess left behind.
We measure the rooms, check the ceiling space and the power, and listen to how you use the house.
One clear price for the right system, with anything outside a standard install agreed up front.
Most single heat pumps go in within a day. We protect your floors, fit it tidily and take the old unit away.
Pressure and leak tested, vacuumed and run up properly. We show you the remote and the app before we leave.
A check-up before winter keeps it efficient and quiet. We service all major brands.
Supplied, installed and serviced
It depends on the room size, ceiling height, insulation, glazing and how much sun it gets. Our free calculator gives you a quick estimate, and we confirm it properly at the in-home assessment.
A correctly sized heat pump typically gives around three times the heat of a plain electric heater for the same power, so it is one of the cheapest ways to heat a room. Running costs depend on the size, the settings and your power plan.
Yes. Modern heat pumps are built for New Zealand winters and keep heating when it is below zero outside. Sizing it properly for the room is what keeps it comfortable on the coldest mornings.
Most single heat pumps go in within a day. Ducted and ventilation systems take a little longer, and we book a date that suits you.
Yes. If we are replacing an existing heat pump, we remove it and dispose of it for you.
Once a year, ideally before winter. Book sooner if it smells musty, drips, or is not heating like it used to. We service all major brands.
Yes, with Wi-Fi control on selected high-wall models and on ducted systems with smart zoning, so you can turn it on before you get home.
Hamilton, Cambridge, Te Awamutu, Waikato and Auckland: homes, new builds and commercial buildings.
Not much. Clear the space under where the indoor unit will go and the spot outside for the outdoor unit, make sure we can get into the roof space or under the floor if the job needs it, and let us know about parking. Someone needs to be home to let us in and for the handover at the end.
Yes, the filters. Every few weeks while it’s working hard, switch it off, slide the filters out, vacuum or rinse them in lukewarm water and let them dry before refitting. Leave the coils, drain and electrical checks to the yearly service.
About an hour for a standard high-wall heat pump. Ducted, multi-room and commercial systems take longer, and we tell you how long when we book.
Yes. A fixed heat pump in the main living room is one of the most common ways to meet the heating standard, which sets a minimum heating capacity for that room. We size the heat pump to meet it. The ventilation standard also needs extractor fans in kitchens and bathrooms, and we install those too.
First check the remote is set to HEAT, the batteries are good, no timer is switching it off, the filters are clean and nothing is blocking the outdoor unit. On frosty mornings it also pauses for a few minutes to defrost, which is normal. If it still blows cold air, shows an error code or leaks water, book a repair and we will find the fault.
Yes. We service and repair Daikin, Mitsubishi Electric, Panasonic, Fujitsu, Haier, AHI Carrier and other major brands across Hamilton and the Waikato, whoever installed them.
Yes. We size the new heat pump for the room, reuse what we safely can, install the new unit and take the old one away for disposal.
Yes. A floor console sits low on the wall, so it suits rooms under windows, with sloping ceilings or without space for a high-wall unit.
It depends on the size of the home, the number of outlets and zones, roof-space access and the controls you choose. We give you a fixed-price written quote after a free in-home assessment.
A ducted heat pump heats and cools the home. An HRV or other ventilation system brings in fresh, filtered air and moves damp air out, but does not heat. Many homes benefit from both, and they can be planned together.
Not always. A multi-split needs fewer outdoor units, but separate single heat pumps are often similar in price and keep working independently. We price both so you can compare.
If you get wet windows, mould on ceilings or a damp smell, ventilation is usually one of the best upgrades for the home. It keeps the air dry and fresh, and dry air is cheaper to heat.
Yes. We install, replace and maintain office, shop and commercial air conditioning across Hamilton and the Waikato, including split, ceiling cassette and ducted systems, with scheduled maintenance for suitable sites.
Tell us what you need and we'll come out, look at the job properly and give you a fixed price.