Skip to content
Pakenham VIC, within 75 km
24/7 emergency gas & hot water
Call now(03) 5947 8000Get free quote →
Gas & Plumbing · Pakenham & within 75 km

Gas ducted heating

A gas furnace in the roof or against an outside wall, ducted to vents through the house. It's still the least expensive way to heat a whole Melbourne home through winter, and the fastest to bring a cold house up to temperature, which is why most homes built here since 1990 have one.

Get my free quote →Or call (03) 5947 8000
  • 3 – 6 starStar rating
  • Internal cupboard or external slabPosition
  • 3 – 4 hours (like-for-like)Time on site
  • 7-yr heat exchanger + 6-yr workmanshipWarranty
What you get

What’s in the price.

A gas furnace in the roof or against an outside wall, ducted to vents through the house. Still the least expensive way to heat a whole Melbourne home through winter, and the fastest to bring one up from cold.

Star rating is the number. The difference between a 3-star and a 5-star unit is a running cost you pay every winter for fifteen years. We'll show you both prices and what the gap actually pays back in.

Choose your system

The gas & plumbing options, side by side.

You're reading about gas ducted heating. Here it is next to everything else we fit, in case it isn't the one.

Insulated flex ductwork run through a roof space to the vents
from $4,600 installed

Gas ducted heating

Brivis · Kaden

A gas furnace in the roof or against an outside wall, ducted to vents through the house. Still the least expensive way to heat a whole Melbourne home through winter, and the fastest to bring one up from cold.

  • Star rating is the number · We quote the payback, not just the price
  • Brivis and Kaden · Wombat, Compact Classic, Buffalo, StarPro
  • Internal or external · Roof, cupboard, or against the wall
  • New flue to standard · Not the old one refitted
You’re reading this one
Thermann continuous flow gas hot water unit on an outside wall
from $1,850 installed

Continuous flow gas hot water

Thermann

Heats water on demand, so it never runs out and there's no tank losing heat overnight. Wall-mounted outside and about the size of a briefcase.

  • No tank losing heat · Heats on demand instead of storing
  • Sized by outlets · 16, 20 and 26 litres a minute
  • Thermann or Rinnai · G-series made for Reece, or Rinnai
  • Same-day on a swap · Most like-for-like replacements
See the full detail
Gas ducted heater in a roof space, where the service and CO test happen
$280 + GST

Gas heater service & carbon monoxide test

Brivis · Kaden

An annual check of the burner, heat exchanger and flue, with a carbon monoxide test on the running appliance. This is the one that matters, a cracked heat exchanger has no smell and no warning.

  • A calibrated analyser · Reading recorded on the report
  • Burner stripped · Cleaned, not visually checked
  • Heat exchanger inspected · Looked at for cracking
  • Flue end to end · Seals checked the whole way
See the full detail
Hot water changeover on site
$30/day hire

Temporary hot water hire

Thermann

A temporary unit plumbed in the same day so the house has hot water while you decide what to replace the old one with. $30 a day, and the $350 set-up and removal is waived if we do the replacement.

  • Connected the same day in most cases
  • $30 per day while it's on site
  • $350 set-up and removal, waived if we do the replacement
  • Buys you time to compare quotes instead of deciding in a panic
See the full detail
How it looks

It lives where the old one lived.

A gas ducted heater goes in one of three places, and which one you have was decided when the house was built: a cupboard inside, a slab against an outside wall, or up in the roof. A like-for-like replacement goes straight back into the same spot, on the same ducts, with the same controller wiring.

  • Three positionsInternal cupboard, external slab, or in the roof
  • Ceiling ventsOne per room, usually the existing ones
  • 3 – 4 hoursA straight swap, same day
  • Ducts reusedWhere they're sound, we check before we quote
Gas ducted heater installed in a roof space with flue and ductwork
Narrow it down

Which one is right for my home?

What's gone wrong, how old it is, and how urgent it is. Runs in your browser, nothing recorded, nothing sent.

What's the job?
How old is it?
How urgent?

Answer the three and the answer appears here.

Brivis Wombat internal gas ducted heater
Keeping it working

The failure with no smell and no warning.

A cracked heat exchanger puts carbon monoxide into the air the house is breathing, silently. No smell, no alarm in most homes, and early symptoms that read as a bad night's sleep. It is the one reason we will not quietly let a heater past ten years go unserviced.

  • $280 + GSTa full service with a calibrated CO analyser
  • Every 2 yearsand annually once it is past ten
  • Condemnedon the spot if the exchanger is cracked, that's the law
How the job runs

What happens on a gas ducted heating install.

  1. 1

    Photo of the existing unit gets you a same-day price

    Send us a picture of the data plate and the cupboard or slab it's sitting on. Most like-for-like ducted replacements can be quoted properly off that without anyone driving out.

  2. 2

    Cavity, ducts and controller assessed

    On a like-for-like the existing cavity, ductwork and controller wiring usually all reuse, which is what keeps it a day rather than a rebuild. We check rather than assume, because a collapsed duct in the roof changes the job.

  3. 3

    Both star ratings quoted

    3-star and 6-star side by side with your gas usage against them. You get the payback maths, not just a recommendation.

  4. 4

    Old unit out, new unit in

    Old heater disconnected, drained where relevant, off the pad and onto the truck for the metal recycler. New unit set, connected and sealed.

  5. 5

    Gas pressure test and commissioning

    Pressure tested to AS/NZS 5601 standing and working, burner checked through its range, controller programmed and the house brought up to temperature while we're still there.

  6. 6

    Carbon monoxide test and certificate

    Calibrated analyser on the new unit, result written on the report, and the gas compliance certificate emailed inside 24 hours rather than chased three weeks later.

Kaden gas ducted drops onto an existing Brivis or Braemar footprint and prices similarly. Duct rework, a new gas run where the existing line is undersized, and cavity alterations are the three things that add, all quoted before the day.

The brands

Who makes the gas ducted heating we fit.

Every model, spec and installed price sits on the brand page. One press each, or open the full list and filter it yourself.

BrivisThe default gas ducted heater in most corridor homes built 1990–2015. Rinnai-backed parts pipeline for legacy Wombat + Buffalo units.Kaden Gas Ducted3 to 6 star, internal and external, on a universal footprint that drops into a Brivis or Braemar cavity so the ducts and wiring reuse.
See the full range →Every model we install, filter by brand, system type or rebate.
Free quote

Quote for gas ducted heating.

60 seconds, no obligation, replied within 12 business hours. Rebates applied and GST included, so the number you get is the number you pay.

  • ✓ Same person quotes as installs
  • ✓ Price confirmed in writing before we start
  • ✓ Emergency? Call (03) 5947 8000 instead
Continuous flow gas hot waterGas heater service & carbon monoxide testTemporary hot water hireAll gas & plumbing
Step 1 of 4 · 25% complete
What do you need installed?

Takes under 60 seconds. No obligation.

Common questions

Quick honest answers.

Anything else, call (03) 5947 8000.

Can you replace my old ducted heater with the same footprint?

Nearly always. Brivis and Kaden internal units are built to drop into the existing cavity, and the ducts, return-air grille and controller wiring usually reuse. That's what keeps it a one-day job.

Is a 6-star worth the extra over a 3-star?

On a house you're staying in, generally yes, the efficiency difference shows up every winter. On a house you're selling in two years, probably not. We'll show you where the crossover lands rather than just pushing the dearer one.

How long does a changeover take?

A like-for-like internal swap is usually a single day. External or a first-time install with new ductwork runs longer, and we'll say which at the quote.

What locals say

Reviews from households across the south-east.

4.9 / 5 on Google
★★★★★

Quoted Mon, installed Fri

“Took the old gas Rinnai out, dropped in a Reclaim heat pump, sorted the VEU rebate so it came straight off the price. Bloke on the phone is the bloke on the tools, refreshing.”

JM
Jess M.Pakenham · heat pump install
★★★★★

Rebate handled, didn't lift a finger

“The VEU paperwork looked scary online. They filled it all in, I signed once at the quote and once on the day. Rebate was already in the price. Painless.”

LM
Lauren M.Pakenham · heat pump swap
★★★★★

No surprises on the invoice

“Quote number matched the invoice exactly. No 'we hit unexpected wiring' story at the end. Nice change.”

PS
Priya S.Cranbourne · split install
★★★★★

Split install in half a day

“Bedroom Mitsubishi went in before lunch. Neat pipework, brackets straight, temp checked before they left. Would use again for the lounge.”

AP
Alex P.Cranbourne East · split
★★★★★

Quoted Mon, installed Fri

“Took the old gas Rinnai out, dropped in a Reclaim heat pump, sorted the VEU rebate so it came straight off the price. Bloke on the phone is the bloke on the tools, refreshing.”

JM
Jess M.Pakenham · heat pump install
★★★★★

Rebate handled, didn't lift a finger

“The VEU paperwork looked scary online. They filled it all in, I signed once at the quote and once on the day. Rebate was already in the price. Painless.”

LM
Lauren M.Pakenham · heat pump swap
★★★★★

No surprises on the invoice

“Quote number matched the invoice exactly. No 'we hit unexpected wiring' story at the end. Nice change.”

PS
Priya S.Cranbourne · split install
★★★★★

Split install in half a day

“Bedroom Mitsubishi went in before lunch. Neat pipework, brackets straight, temp checked before they left. Would use again for the lounge.”

AP
Alex P.Cranbourne East · split
★★★★★

Family business, feels it

“Answered the phone myself, quoted the job, showed up to install the job. That trail of trust doesn't exist with most of the bigger mobs anymore.”

TH
Tom H.Narre Warren · heat pump
★★★★★

Emergency sorted Sunday

“Hot water died on a Sunday with three kids in the house. Answered the phone, had a temp loaner running by lunch, new iStore in on Tuesday. That's service.”

SK
Sam K.Berwick · emergency hot water
★★★★★

Follow-up call was a surprise

“A week after install they rang to check the heat pump was running quiet and the app was set up. First tradie who's ever followed up after payment cleared.”

ND
Nick D.Beaconsfield · heat pump
★★★★★

Family business, feels it

“Answered the phone myself, quoted the job, showed up to install the job. That trail of trust doesn't exist with most of the bigger mobs anymore.”

TH
Tom H.Narre Warren · heat pump
★★★★★

Emergency sorted Sunday

“Hot water died on a Sunday with three kids in the house. Answered the phone, had a temp loaner running by lunch, new iStore in on Tuesday. That's service.”

SK
Sam K.Berwick · emergency hot water
★★★★★

Follow-up call was a surprise

“A week after install they rang to check the heat pump was running quiet and the app was set up. First tradie who's ever followed up after payment cleared.”

ND
Nick D.Beaconsfield · heat pump
★★★★★

Actually got up in the roof

“Had three quotes for a ducted system. These guys were the only ones who actually crawled into the roof. Middle of the pack on price but installed cleaner than the others would have.”

DR
Dean R.Officer · ducted retrofit
★★★★★

Cleaned up like nothing happened

“Full ducted retrofit over two days. When they left the roof cavity was tidier than they found it and the driveway had been swept. Small thing but it matters.”

BR
Bianca R.Berwick · ducted install
★★★★★

Explained everything

“Walked me through the Milieu tablet, showed the wife how to use it, showed us the compliance cert. Ten minutes of teaching that other installers just skip.”

MT
Marcus T.Officer · ducted aircon
★★★★★

Actually got up in the roof

“Had three quotes for a ducted system. These guys were the only ones who actually crawled into the roof. Middle of the pack on price but installed cleaner than the others would have.”

DR
Dean R.Officer · ducted retrofit
★★★★★

Cleaned up like nothing happened

“Full ducted retrofit over two days. When they left the roof cavity was tidier than they found it and the driveway had been swept. Small thing but it matters.”

BR
Bianca R.Berwick · ducted install
★★★★★

Explained everything

“Walked me through the Milieu tablet, showed the wife how to use it, showed us the compliance cert. Ten minutes of teaching that other installers just skip.”

MT
Marcus T.Officer · ducted aircon
Call the team(03) 5947 8000Get a quote →