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Hydronic Cooling

Hydronic Cooling Systems

Hydronic cooling NSW — chilled-water underfloor cooling, fan coils and chilled beams. The same network that heats your home in winter cools it in summer, silently, evenly, with no draughts or recirculated allergens. Year-round comfort from one installation.

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Hydronic cooling system schematic

A reversible heat pump can run either direction — heating water in winter, chilling water in summer. The same hydronic network distributes that water to the same emitters in your home.

Cooling needs slightly different emitters — we use chilled-water fan coils, chilled beams in commercial settings, or specially-designed underfloor cooling — but the boiler-side and pipework remain shared.

Why hydronic cooling

Air conditioning works by recirculating cooled air through ducts. That means dust, mould spores, allergens and noise are pushed through every room.

Hydronic cooling is silent (chilled water doesn't move air) and dust-free (no air recirculation). The cool surfaces of fan coils or floors absorb heat from your body via radiation.

Key benefits

  • Whisper-quiet — no fan noise
  • No dust or allergen recirculation
  • Even cool surface temperature
  • Same network as heating — one system
  • Per-room control with thermostats
  • Dehumidification built-in for humid climates
FAQs

Common questions

Does hydronic cooling actually work in humid Australian summers?

Yes — paired with a small fan-coil dehumidifier and a dew-point sensor, hydronic cooling works reliably in humid coastal climates. We size the dehumidification component to your local humidity profile.

Will my floors get wet from condensation?

Not with proper design. We install dew-point sensors that automatically raise the chilled water temperature if humidity rises, preventing any surface condensation. Decades of European installs and our own AU experience confirm zero issues when properly engineered.

How much does it cost vs ducted AC?

Up-front cost is similar to a quality ducted AC if you're already installing hydronic heating (the network is shared). Running cost is 25–40% lower because chilled water transports cooling more efficiently than air, and there are no fan motors to power.

Can one system do both heating and cooling?

Yes — a reversible heat pump circulates warm water in winter and chilled water in summer through the same network, so a single all-electric system covers both seasons. It's the most efficient way to get year-round comfort from one piece of plant.

Underfloor cooling or fan coils — which is better?

Underfloor cooling is silent and invisible, ideal as a quiet baseline for well-insulated homes; fan coils respond faster and add dehumidification for hot days and high-load rooms. Most homes blend both — underfloor for the baseline, a fan coil or two for peak-day boost.

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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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