Hydronic Heating & Cooling Specialists
1300 76 53 39
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Sydney, NSW · installed by AHHAC

Hydronic cooling Sydney — silent, even, chilled-water comfort.

The same hydronic network that heats your home in winter can cool it in summer. AHHAC designs chilled-water underfloor cooling and fan-coil systems for Sydney homes — draught-free, near-silent, dew-point controlled, and 25–40% cheaper to run than ducted air-conditioning.

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Authorised supplier & installer
Maxa authorised supplierViessmann authorised installerImmergasSimeThermaSkirt™
Plumbing Lic 262528CABN 85 164 746 4906 showrooms · NSW · ACT · VIC · QLDEst. 1998

Hydronic cooling works by circulating chilled water — instead of warm water — through your underfloor loops or through discreet fan coils, absorbing heat from each room quietly and evenly. Because water carries heat far more efficiently than air, hydronic cooling uses noticeably less energy than a ducted air-conditioner, with none of the draughts, blown dust or fan noise. For Sydney homes that already run hydronic heating, adding cooling often means little more than a reversible heat pump on the existing pipework.

AHHAC designs and installs hydronic cooling across Greater Sydney from our Punchbowl showroom. For the technology in depth, see our hydronic cooling systems page and our guide to the benefits of hydronic underfloor cooling.

Underfloor cooling vs fan coils — which suits your Sydney home?

In-slab underfloor cooling gently lifts heat out of the room through the floor — beautifully silent and invisible, ideal for well-insulated new builds and modest cooling loads. For Sydney's hotter days, west-facing glazing or higher loads, we add hydronic fan coils that deliver faster, deeper cooling on demand. Most homes use a blend: underfloor as the quiet baseline, a fan coil or two for peak-day boost. The physics behind it is explained in our guide to radiant floor cooling.

Humidity and condensation — engineered out

The critical design detail for Sydney's humid summers is dew-point control. We install sensors that automatically raise the chilled-water temperature if room humidity climbs, so floors and pipework never sweat, and we size a small dehumidification stage where the coastal climate needs it. Getting this wrong is the classic cheap-install failure — see our guide to mistakes to avoid. A single reversible heat pump (Maxa i-290 or i-32V5) provides both the winter heating and the summer chilled water, keeping the whole system all-electric and solar-ready.

Why Sydney homes choose this system

  • Silent, draught-free cooling — no blown air, no fan noise
  • 25–40% lower running cost than ducted air-conditioning
  • Underfloor cooling for a quiet baseline, fan coils for peak-day boost
  • Dew-point sensors so floors never sweat in the humidity
  • Runs on the same pipework as your hydronic heating
  • One reversible heat pump for both heating and cooling
  • Designed and installed from our Punchbowl (NSW) showroom
Common Sydney questions

Hydronic Cooling Sydney — FAQ

Does hydronic cooling really work in Sydney's humid summers?+
Yes — paired with dew-point control and a small fan-coil dehumidification stage, hydronic cooling works reliably in Sydney's humid coastal climate. We size the dehumidification to your suburb's humidity profile so cooling stays comfortable and condensation-free.
Will my floors get wet from condensation?+
No. Dew-point sensors automatically raise the chilled-water temperature if humidity rises, preventing any surface condensation. Decades of European installs and our own Sydney experience confirm zero issues when the system is properly engineered.
How much cheaper is hydronic cooling than ducted AC?+
Running cost is typically 25–40% lower, because chilled water transports heat far more efficiently than air and there are no large fan motors. If you're already installing hydronic heating, the extra cost to add cooling is small because the network is shared.
Can I add cooling to my existing Sydney hydronic heating?+
Often yes — if your system is heat-pump-ready we can add reversible chilled-water cooling to the existing loops, sometimes just by swapping to or adding a reversible heat pump and cooling controls. We'll assess your current setup and quote within 24 hours.

Last updated 24 July 2026 · AHHAC

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
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