Melbourne homeowners want comfort in every season. That means warm winters, cool summers and something that copes with the days when spring delivers both in a single afternoon. For builders, that puts heating and cooling squarely on the list of decisions that can make or break a handover.
Ducted systems are popular in new homes, but they’re also one of the trickiest items to coordinate. Ducts, outlets, indoor and outdoor units and electrical supply all need to fit around structure and other trades. Get the timing wrong and you’re cutting into finished ceilings. Here’s how to get it right in Ringwood, Dandenong and across Melbourne.
Common system types
Ducted reverse-cycle air conditioning. A single outdoor unit and a central indoor unit deliver heating and cooling through ducts and ceiling or floor outlets. It’s the most common ducted option in all-electric homes, since it uses electricity for both heating and cooling. Brands we install include Daikin, Braemar by Seeley, Mitsubishi and Panasonic.
Ducted evaporative cooling. Evaporative systems cool air by passing it over water-soaked pads. They can be a cost-effective cooling option in Melbourne’s drier months, though they perform less well in humid conditions. They need a water supply and roof-space installation, so timing with the roofing trade matters.
Ducted gas heating. Where gas is still permitted, ducted gas heating remains a heating option and can pair with separate cooling. On projects covered by Victoria’s all-electric planning requirement, reticulated gas isn’t available, so confirm what applies before specifying.
Hydronic heating. Radiant floor or panel heating using circulated hot water, generally installed at slab or frame stage. It delivers quiet, even warmth and is often paired with a separate cooling system since it doesn’t cool.
Split systems. Individual wall-mounted or floor-mounted units serving one room or zone are common in smaller homes, apartments and additions.
Each system has different space, drainage, electrical and licensing requirements, so the choice needs to be made at design stage.
Why timing matters
Ducted systems have to go in early. Ductwork, flexible runs, plenums and outlet penetrations are typically installed in the roof space or under the floor at frame stage, before insulation and ceiling linings go up. Once the ceilings are closed in, adding or moving ducts becomes messy and expensive.
That means the following decisions should be settled well before lock-up:
- System type and capacity
- Location of the indoor unit, whether in the roof space, under the floor or in a utility area
- Location of the outdoor unit or evaporative cooler
- Positions of outlets and returns
- Where condensate drains to
- Electrical supply and switchboard capacity
Get the sizing right
Bigger isn’t always better. Modern homes built to current energy efficiency standards are generally better insulated and more airtight than older houses, which can mean smaller heating and cooling loads. An oversized system may cycle on and off inefficiently, cost more to buy and run, and give less even comfort. A proper load calculation, based on the home’s design, orientation and thermal performance, should guide system size rather than rules of thumb.
Where coordination with other trades comes in
Heating and cooling touches several other trades on site. Things worth coordinating include:
Condensate drainage. Reverse-cycle systems produce condensate water that has to drain somewhere sensible, typically to an approved drainage point. Poorly planned condensate lines can overflow or leak into ceilings.
Electrical supply. Ducted systems, particularly larger reverse-cycle units, draw significant power. Confirm circuit and switchboard capacity with your electrician early, especially on all-electric homes that no longer have gas as an option.
Roof penetrations and weatherproofing. Flues, ducts and roof-mounted equipment need to be properly flashed and sealed, so sequence HVAC rough-in with the roofing trade.
Outdoor unit placement. Outdoor equipment often competes for the same limited outdoor space as hot water units, especially on compact Ringwood blocks. Plan them together.
Licences and who does what
Heating and cooling work involves several licensed disciplines. Refrigerant handling requires a refrigeration licence, electrical connections require a licensed electrician and gas heating work requires a licensed gasfitter. Using an installer who holds the necessary licences, or who coordinates them effectively, reduces the number of parties you need to manage and lowers the risk of gaps in responsibility.
Common mistakes to avoid
- Deciding late. Choosing a system after ceilings are lined limits options and adds cost
- Ignoring roof space. Bulky units and ducts need room and access, and some roof designs make this difficult
- Forgetting the outdoor unit. Clearances, noise and neighbour boundaries matter
- Skipping load calculations. Guessing capacity leads to comfort complaints
- Neglecting condensate drainage. Plan the route early
- Poor commissioning. Systems need proper testing, balancing and client handover
Why spring is the right time
Spring is the sweet spot for heating and cooling decisions. The last cold snaps are fresh in everyone’s memory, and the first hot days are on the way. Clients moving in before summer will want cooling ready to go. Builders who get orders in and installations booked now avoid the summer rush, when installers are stretched and lead times grow.
Ringwood and Dandenong considerations
Buyers in Ringwood and the eastern suburbs often put heating performance high on their list after a cold winter, while in Dandenong and further south-east, hot summer days tend to make cooling the priority. Whatever the suburb, tailoring the system to the home and the client’s expectations will reduce complaints and callbacks.
One partner for design, install and commissioning
Efficient Pure Plumbing installs and commissions ducted heating, evaporative cooling, hydronic heating and split systems for builders across Ringwood, Dandenong and Melbourne’s east and south-east, through our dedicated partner program for builders and traders.
