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IMMERGASMagis Range · Italy · Hunt Heating AU

Immergas Magis

Italian-engineered hydronic air-source heat pumps — 4 to 30 kW

Immergas's Magis range covers everything from a 4 kW compact apartment heat pump to a 30 kW light-commercial unit. Three chassis bands, single- and three-phase configurations, and AS-compliant installation backed by Hunt Heating's Australian master-distributor network. AHHAC is an authorised installer for the full Magis range nationwide.

Chassis bands
3 sizes
Output range
4 – 30 kW
Power supply
230 / 380 V
Origin
Italy
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Immergas Magis air-source hydronic heat pump installation
Outdoor monoblock
Anti-vibration mount · 100 mm clearance · Magis controller external

The short answer

Updated

The Immergas Magis heat pump is an Italian outdoor monoblock air-source unit for hydronic heating, cooling and hot water, offered in three chassis bands covering 4–30 kW with single-phase 230 V and three-phase 380 V options. It suits apartments through to large homes and is especially strong as a retrofit onto existing radiators, fan coils or underfloor. AHHAC is an authorised Magis installer, working with Australian distributor Hunt Heating.

Output range
4–30 kW
Chassis bands
3
Power supply
230 V or 380 V
Warranty
Up to 5 years

Reviewed by the AHHAC Technical Team — licensed plumbers & hydronic engineers, NSW Lic 262528C.How we write & review

About the Magis range

Three chassis bands. Compliant Australian install.

The Immergas Magis is an outdoor monoblock air-source heat pump range, designed for residential and light-commercial hydronic systems. Three chassis bands cover the full Australian household heat-load spectrum — 4–6 kW for compact apartments and townhouses, 8–16 kW for typical residential whole-home applications, and 18–30 kW for large homes and small-commercial sites.

The Magis is supplied into Australia by Hunt Heating, who hold the master distribution agreement for Immergas hydronic heat pumps. AHHAC is an authorised installer and works directly with Hunt Heating for parts supply, warranty registration and ongoing service support across NSW, VIC and QLD.

Every Magis install carried out by AHHAC follows the Immergas Australia compliance schedule: anti-vibration feet, minimum 100 mm ground clearance for the condensate drain, the Magis Main Controller installed outside the unit (with optional weatherproof enclosure), and Adey MC Zero inhibitor as standard whenever the system runs in cooling mode.

Chassis bands & clearance requirements

BandA (sides)B (rear)C (sides)D (front)E (top)
4 – 6 kW300 mm1000 mm300 mm600 mm200 mm
8 – 16 kW300 mm1500 mm300 mm600 mm200 mm
18 – 30 kW300 mm3000 mm300 mm600 mmNo restriction

Immergas Australia installation compliance — at a glance

  • Transport bracket / mount MUST be removed at install before commissioning.
  • Anti-vibration feet are mandatory — supplied with the unit.
  • Minimum 100 mm off the ground to allow condensate drain installation.
  • Adey MC Zero corrosion inhibitor MUST be used in any cooling-mode installation.
  • Anti-corrosive treatment recommended in high-salt coastal areas.
  • Magis Main Controller MUST be installed outside the unit — weatherproof enclosures available.
  • Heat pump MUST be isolatable with electrical disconnect during service.
  • Special access equipment (scaffolding etc.) is the client's responsibility.
  • Hydraulic kit: 32 mm BUM unions, 32 mm Y-strainer (R881Y002), tee, ball valves, auto air vent.
  • Third-party thermostat input is supported via the Hydro PCB — single and three-phase wiring schematics differ.

Commissioning checklist

  1. Menu → Serviceman → enter passcode 234 to access commissioning parameters.
  2. Set DHW mode (yes / no based on whether a hot water cylinder is fitted) and confirm.
  3. Set Cool mode (yes / no based on whether the install supports chilled water — Adey MC Zero required if yes) and confirm.
  4. Configure Room Thermostat — One Zone for single-zone, multi-zone configuration for staged sites.
  5. Set flow temperature to the required set-point — typically 35–45 °C for underfloor, 55–65 °C for radiators.
  6. To reset any fault: turn the unit off and on. There is a 5-minute restart delay after fault reset.
  7. Initial E4 error on startup is normal — clears once commissioning parameters are confirmed.
Project fit

Where the Immergas Magis works best.

The Magis is most often specified where outdoor-clearance flexibility, three-phase availability or the Hunt Heating service network is the deciding factor.

Apartment / townhouse (4–6 kW)

Compact unit with the smallest clearance envelope in the Magis range — fits on small balconies, courtyards and side walkways. Single-phase only.

Family home (8–16 kW)

Workhorse mid-band Magis. Pairs with hydronic underfloor, radiator panels and DHW cylinders. Available single or three-phase depending on chassis.

Large home / small commercial (18–30 kW)

Three-phase only. Suits 350 m² + houses, two-storey designer builds, and small offices, daycare or gym sites.

Heat-pump replacement

The Magis works with existing hydronic distribution (radiators, fan coils, underfloor) at conventional flow temperatures — ideal as a like-for-like upgrade of older heat pumps.

Cooling-capable retrofits

Where a homeowner wants to add summer chilled-water cooling to an existing hydronic system, the Magis reverses cycle and we add Adey MC Zero inhibitor to the loop.

BMS / smart-thermostat sites

Third-party thermostat input on the Hydro PCB allows integration with MAXA wall thermostats, BMS systems or smart-home gateways.

Retrofit planning

Fitting an Immergas Magis heat pump to an existing radiator system

A large share of Magis jobs are retrofits: the home already has radiators or underfloor fed by an old boiler or a tired heat pump, and the owners want to go electric without ripping out the emitters. It works well — but only if the existing system is assessed honestly first.

Our retrofit checklist

  • Every radiator at heat-pump temperatures. Radiators chosen for a gas boiler were often sized for hotter water than a heat pump likes to make. The Magis is happiest at around 55–65 °C for radiators and 35–45 °C for underfloor, and at those temperatures a radiator gives out less heat. We compare each room's output with its heat loss. Usually most rooms are fine and one or two need a larger or double panel, which our in-stock IMAS radiators make a quick swap.
  • Clean water. Old circuits carry sludge that blocks strainers and coats heat exchangers, so we flush the hydronic circuit before connecting the Magis and its Y-strainer.
  • The right band and supply. We choose the smallest band that covers the coldest day. If the heat loss lands in the 18–30 kW band, that's three-phase only, so we confirm the supply early — a power upgrade can take longer than the plumbing.
  • A better outdoor spot. The old boiler's position is rarely right for a heat pump. Rear clearance grows with chassis size, so narrow side passages often suit only the smaller bands, and we keep the unit away from bedroom windows and the neighbour's boundary.
  • Cooling decided now. If you might want summer chilled-water cooling, say so at design stage. Pipe insulation and Adey MC Zero dosing are far easier to include during the retrofit than afterwards.

Expect the house to feel different, too: a heat pump on radiators runs longer at gentler temperatures rather than blasting heat in short bursts, so rooms stay steadier through the day. Our guide to retrofitting hydronic heating walks through the wider process, from survey to commissioning.

Written from on-site experience by the AHHAC Technical Team.

Who designs & installs this

Licensed, in-house hydronic engineers — since 1998.

AHHAC's in-house design and service team — licensed plumbers and hydronic engineers (Lic 262528C) who have designed and installed 2,400+ hydronic heating, cooling and hot water systems across Australia since 1998.

We only specify equipment after a heat-loss and system-compatibility check, then supply, install and commission it with our own licensed plumbers to AS/NZS 3500 (plumbing) and AS/NZS 5601 (gas), register the manufacturer warranty and service it for the life of the system.

  • Sized from a heat-loss & compatibility check
  • Authorised Maxa, Viessmann & Immergas supplier
  • Supplied, installed & commissioned in-house
  • Manufacturer warranty registered for you
  • Six showrooms: NSW · ACT · VIC · QLD
  • Spare parts & servicing after install
Read our case studies →Customer reviews →Editorial standards →
262528C
NSW plumbing licence
85 164 746 490
ABN (verifiable on ABN Lookup)
2,400+
Hydronic systems installed
Since 1998
Operating in Australia
AS/NZS 3500
Plumbing & drainage standard
AS/NZS 5601
Gas installations standard
Common questions

Immergas Magis — FAQ

Who is Immergas and where are Immergas heat pumps made?+
Immergas is one of Italy's leading hydronic heating manufacturers, founded in 1964 in Brescello, Italy. The Immergas Magis range of air-source heat pumps is designed and manufactured in Italy and supplied into the Australian market through Hunt Heating, who are the master distributor for Immergas hydronic heat pumps in Australia.
What sizes are available in the Immergas Magis range?+
The Magis range comes in three chassis bands — 4–6 kW (compact apartments and townhouses), 8–16 kW (residential whole-home heating and cooling), and 18–30 kW (large homes, light commercial and multi-zone hydronic). Each band has different clearance and installation requirements, all of which AHHAC handles at the design stage.
What's the power-supply requirement?+
Two configurations: single-phase 230 V AC 50 Hz for the smaller residential models, and three-phase 380 V AC 50 Hz for the larger residential and commercial models. AHHAC checks switchboard and consumer mains capacity at the design audit — for retrofits, we coordinate any required electrical upgrades.
Where can the Immergas Magis be installed?+
The unit is designed for outdoor installation. It MUST be mounted on anti-vibration feet, with a minimum 100 mm clearance off the ground for the condensate drain. The Magis Main Controller MUST be installed outside the unit (weatherproof boxes available). In high-salt coastal areas Immergas recommend anti-corrosive treatment of the outer chassis as part of commissioning.
What are the clearance requirements?+
Clearances vary by chassis size. For the 4–6 kW unit: 300 mm sides, 1000 mm rear, 600 mm front, 200 mm top. For the 8–16 kW unit: 300 mm sides, 1500 mm rear, 600 mm front, 200 mm top. For the 18–30 kW unit: 300 mm sides, 3000 mm rear, 600 mm front — top clearance is unrestricted. AHHAC validates clearances against your specific site at survey.
Why does the install require an Adey MC Zero in cooling mode?+
When the Magis runs in cooling mode it circulates chilled water through the hydronic loop. Adey MC Zero is a chemical inhibitor that prevents corrosion, scaling and microbiological growth in the hydronic circuit, which is critical when running the system below dew-point. Immergas mandates MC Zero in any Magis cooling install — AHHAC includes it as standard.
Can a Magis heat pump run with a third-party thermostat?+
Yes. The Magis controller supports a third-party thermostat input on the Hydro PCB inside the unit — useful for sites that already have a smart-home or BMS thermostat, or where AHHAC fits a MAXA wall thermostat for per-zone control. Wiring is straightforward for both single-phase and three-phase versions.
What system additions are needed beyond the heat pump itself?+
A standard Magis install requires: 32 mm BUM unions and ball valves on flow and return, a 32 mm Y-strainer (R881Y002), a flow / return tee, an automatic air vent, and the secondary system pump (if heat-pump operating its own circulation isn't sufficient for the building load). AHHAC supplies all hydraulic accessories as a kit so commissioning is single-visit.
What's the warranty on the Magis?+
Manufacturer warranty is up to 5 years on the unit when registered with Hunt Heating and serviced annually by an authorised installer. AHHAC includes a workmanship warranty on top of the manufacturer cover and offers annual service contracts that maintain warranty validity.
Does AHHAC install Immergas Magis nationwide?+
Yes — AHHAC installs the full Magis range across NSW, ACT, VIC and QLD from our Punchbowl (NSW), Laverton North (VIC) and Banyo (QLD) showrooms. Scope includes heat-loss design, hydraulic schematic, certificate of compliance, commissioning and annual service.
Last updated Content reviewed by the AHHAC Technical Team (NSW plumbing licence 262528C)Editorial standards