Hydronic heating, cooling and hot water for Forrest homes — designed and installed by AHHAC, Canberra's hydronic specialists, from our nearest showroom in Fyshwick.
Hydronic heating in Forrest is designed for Canberra's coldest-capital winters of 2,000+ heating degree-days, and increasingly means converting large heritage and interwar homes from gas to an all-electric system. A cold-rated Maxa i-290 heat pump, rated to −25 °C ambient, drives existing or new radiators, ThermaSkirt skirting heating or in-slab underfloor. AHHAC designs each Forrest system from a room-by-room heat-loss calculation and installs it from our Fyshwick showroom.
Reviewed by the AHHAC Technical Team — licensed plumbers & hydronic engineers, NSW Lic 262528C.How we write & review
ImmergasSimeThermaSkirt™Forrest is Canberra's most prestigious address — a leafy, heritage inner-south suburb of grand homes on generous blocks, minutes from Parliament House. It also sits in the coldest capital city in Australia, with well over 2,000 heating-degree-days, hard frosts and sub-zero winter mornings. For homes of this calibre, in a climate this cold, hydronic heating is the obvious choice: silent, even, whole-home warmth that respects fine interiors and costs a fraction of the alternatives to run. AHHAC designs and installs all-electric hydronic systems across Forrest and the inner south from our Fyshwick showroom, as part of our wider hydronic heating Canberra service.
Canberra's long, genuine winter is the reason hydronic has been the local standard for decades, and Forrest feels every degree of it. Hydronic warms surfaces rather than blowing hot air, so the heat is even from floor to ceiling with no draughts, no fan noise and no dry, dusty air — a world away from ducted systems that leave the far rooms cold and the bills high. Across a heating season that runs May to September, that even, radiant comfort is far more pleasant at a lower thermostat setting, and it saves energy across the whole winter. For Forrest's large, high-ceilinged homes, hydronic keeps every room comfortable, quietly and efficiently.
Forrest is characterised by substantial interwar and mid-century residences, heritage-listed homes and premium contemporary rebuilds, many on large garden blocks. These are quality homes — and often thermally demanding, with high ceilings, generous glazing and solid, sometimes uninsulated construction that increases heat loss. That makes a room-by-room heat-loss calculation, done to Canberra's real design temperature, essential; size the plant to a milder figure and it will fall short on the coldest Forrest mornings. For new builds and renovations with new floors, in-slab underfloor heating is the cold-climate ideal; for heritage homes and staged renovations, European panel radiators retrofit easily and warm fast.
In a suburb this cold, the heat source matters more than anywhere. We build Forrest systems around the cold-rated Maxa i-290 heat pump, rated to −25 °C ambient, so it holds full output through ACT frosts without fading or leaning on expensive backup elements — while returning a seasonal COP of 3.5–4.5. It drives in-slab underfloor for new builds (the slab's thermal mass rides through freezing nights) or radiators for renovations, and many Forrest homes blend the two. For the full picture see our heat pump hydronic heating Canberra page and our guide to hydronic heating in the cold capitals.
Many Forrest homes are heritage-listed, and their owners won't accept ducting bulkheads or visible plant marring fine interiors. Hydronic is the heritage-friendly answer — European panel and column radiators install without slab works, and ThermaSkirt skirting heating disappears into the architecture entirely. And with the ACT leading Australia on electrification — progressively ending new gas connections — an all-electric heat-pump system is the future-proof choice: no gas standing charge, and no reliance on a shrinking network. A reversible unit also cools in summer, so one machine covers Canberra's cold winters and hot, dry summers alike.
The colder the climate, the more the heat pump's efficiency pays off. Over a Forrest winter, the gap between a resistive system and a COP-4 heat pump compounds into serious savings, and running the system on daytime solar pushes the marginal cost of heat toward zero — see our Canberra running-costs guide. AHHAC serves Forrest and the inner south from our Fyshwick showroom; every job runs the same way — consult and site visit; heat-loss calculation to the ACT's real design temperature, design and fixed-fee quote within 24 hours; in-house install to AS/NZS standards; and full commissioning. Beyond Forrest we cover Red Hill, Griffith, Deakin, Yarralumla and the wider inner south — see our hydronic heating Canberra page.
Many of Forrest's grand interwar and mid-century homes already have hydronic heating, usually a gas boiler feeding radiators that has been running for decades. With the ACT having stopped new gas network connections and planning a longer-term move away from gas, the question we hear most in Forrest isn't whether to have hydronic, but how to take an existing system all-electric without losing comfort on a frosty morning.
The other half of the decision is the rest of the house. The gas supply charge only disappears once the last gas appliance goes, so we help you plan the order: heating first, then hot water, often to a heat pump water heater, and finally the cooktop, after which the gas meter can be removed. Space heating is by far the biggest gas user in a Canberra home, so tackling it first means every later step adds to savings you are already seeing.
For a measured example of how a converted Canberra home performs through a sub-zero winter, see our cold-climate heat pump retrofit case study. Forrest conversions are designed, installed and serviced from our Fyshwick showroom; see hydronic heating Canberra for the wider inner-south service area.
Written from on-site experience by the AHHAC Technical Team.
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 design hydronic heating from a room-by-room heat-loss calculation, install it with our own licensed plumbers to AS/NZS 3500 (plumbing) and AS/NZS 5601 (gas), commission and document it, and service it for the life of the system. Nothing is subcontracted out.
Last updated · AHHAC — serviced from Fyshwick
"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."
"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."
"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."