Hydronic Heating & Cooling Specialists
Products

Air Conditioning

Reverse-cycle split, multi-split and ducted air conditioning — including the new MAXA Total-One, which cools, heats AND makes your domestic hot water from one system. Paired with hydronic where it makes sense, supplied where ducted is the right call.

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The short answer

Updated

Air conditioning in Sydney is best handled by an inverter reverse-cycle system: a split for single rooms, a multi-split for several rooms from one outdoor unit, or ducted for whole-home cooling. AHHAC supplies and installs Mitsubishi, Daikin, Fujitsu and Panasonic systems, plus the MAXA Total-One, which runs up to three indoor heads and heats a 190-litre hot water cylinder at a COP of up to 3.9, so one system covers cooling, heating and hot water.

System types
Split, multi, ducted
Total-One cylinder
190 L
Total-One hot-water COP
Up to 3.9
Total-One indoor heads
Up to 3

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

AC isn't always the answer — but sometimes it is. We supply and install reverse-cycle split systems (single-room), multi-splits (multi-room from one outdoor unit), and ducted systems for whole-of-home cooling. Mitsubishi, Daikin, Fujitsu, Panasonic.

We're equally happy to recommend hydronic cooling instead, and we'll be honest about which suits your project better.

New: MAXA Total-One — air conditioning that also makes your hot water

The MAXA Total-One is a revolutionary new system that does three jobs from one compact plant: air conditioning, heating AND domestic hot water. A single-phase inverter outdoor unit drives up to three indoor hi-wall heads and charges an integrated 190-litre stainless steel hot water cylinder.

Because it's a thermodynamic heat pump (COP up to 3.9) rather than a 1:1 electric element, it makes hot water for a fraction of the cost of a traditional electric tank — an estimated saving of around $874 a year on a typical Sydney home. In summer its Total Energy Recovery Circuit redirects the heat pulled out of your rooms straight into the hot water tank, so your hot water is effectively free while you cool. Hot water to 55 °C, low-GWP R32 refrigerant and whisper-quiet 26 dB(A) indoor heads. See the MAXA Total-One page (linked opposite) for full specs and pricing.

Key benefits

  • NEW — MAXA Total-One: multi-split AC + 190 L domestic hot water in one system
  • Mitsubishi, Daikin, Fujitsu, Panasonic
  • Inverter technology — quiet, efficient
  • Single-room to whole-home ducted
  • BCA compliance + condensate drainage
  • Wi-Fi controls + smart-home integration
  • Annual service contracts available

Featured products & systems

MAXA Total-One — Air Conditioning + Domestic Hot Water

MAXA Total-One — Air Conditioning + Domestic Hot Water

One compact system for cooling, heating and domestic hot water. Inverter outdoor unit + up to 3 indoor heads + integrated 190 L cylinder, COP up to 3.9 — with effectively free hot water in summer via energy recovery.

Getting AC right in Sydney

Air conditioning in Sydney: sizing, siting and strata approvals

Most air conditioning complaints we hear in Sydney are not about the brand. They come from a unit that is the wrong size, in the wrong place, or installed without the right approvals. Here is what we check before we quote.

  • Size to the heat gain. A west-facing living room with big glass, or a bedroom under a poorly insulated roof, can need far more cooling than its floor area suggests. An oversized unit cools the air quickly and switches off before it has pulled much moisture out, leaving rooms cold but clammy on humid days.
  • Site the outdoor unit for airflow and neighbours. Condensers need clear space to breathe and should not discharge hot air into a narrow side passage. NSW noise rules restrict when an air conditioner can be heard inside a neighbour's home at night, so we keep units away from boundary bedrooms and fit anti-vibration mounts.
  • Plan the condensate. Indoor heads produce water whenever they cool. It must drain to an approved point, not drip onto a balcony or into a garden bed against the slab.
  • Check strata first. In apartments and townhouses the owners corporation usually has to approve the condenser location, wall penetrations and pipe covers. We can supply the product specifications and layout the committee typically asks for.

When we suggest something other than AC

Reverse-cycle split systems are the cheapest way to cool one or two rooms. For a whole home, especially where someone suffers from allergies or dislikes draughts, we often recommend hydronic cooling through fan coils or underfloor instead. And if you also need new hot water, the MAXA Total-One combines up to three indoor heads with a 190-litre cylinder, which can make more sense than buying an AC system and a separate hot water unit.

Compare the options on our ducted vs hydronic heating page, read the full specifications on the MAXA Total-One page, or see how hydronic cooling in Sydney handles humid summers without the draughts of a ducted system.

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
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
FAQs

Common questions

Do you have an air conditioner that also makes hot water?

Yes — the new MAXA Total-One. One compact system provides air conditioning, heating and domestic hot water: a single-phase inverter outdoor unit drives up to three indoor hi-wall heads and an integrated 190-litre hot water cylinder, at a COP of up to 3.9. In summer it recovers the heat from cooling to make your hot water almost free. See our MAXA Total-One page for full details.

Should I choose ducted or split AC?

Splits: cheaper per room, single-room control, easier to install. Ducted: invisible at room level, single thermostat option, better aesthetic. Multi-splits split the difference. We'll spec based on layout, budget and aesthetic priorities.

Which AC brands do you supply?

Mitsubishi Electric (premium, quietest), Daikin (workhorse reliability), Fujitsu (good value), Panasonic (mid-range). We hold service relationships with all four — including extended warranty registrations.

Can you replace an AC outdoor unit only?

Sometimes — if the indoor unit is recent and uses compatible refrigerant. Often it's better to replace both because newer outdoor units use newer refrigerants. We'll inspect and quote both options.

Reviews

Trusted by homeowners, builders and strata across Australia

★★★★★
Rated 5-star across NSW · ACT · VIC · QLD
★★★★★

"AHHAC delivered our 22-zone underfloor system on time, on budget and to spec. The crew were tidy, the documentation was thorough, and the commissioning was textbook."

David Chen
Custom Builder · Mosman, NSW
★★★★★

"We've worked with AHHAC for 17 years. They've installed and serviced our hot water plant across three commercial buildings — and they pick up the phone on weekends."

James Holloway
Strata Manager · Melbourne CBD
★★★★★

"Three mobs quoted us; AHHAC's design was the only one based on a proper heat-loss calculation. The system runs beautifully — the others would've been oversized and expensive."

Janelle Smith
Homeowner · Robina, QLD
Last updated Content reviewed by the AHHAC Technical Team (NSW plumbing licence 262528C)Editorial standards