Ducted Gas Heating Replacement

Book Online

By providing your mobile number, you agree to receive SMS updates about your booking, job progress, missed-call follow-ups, and other service communication from Alliance. You can reply STOP to unsubscribe at any time.

Save up to

$700

With any Air conditioning or Gas heater replacement installation trade in*

Limited time only, offer ends . Not to be combined with any other offer.

*Offer to be presented at point of booking or sale.

Request a Upfront Quote

4.9/5 Star 2500+ Reviews

5/5 Star 1066+ Reviews

5/5 Star 40+ Reviews

5/5 Star 60+ Review

Get Ready for Winter With Our Exclusive Online Promotions

Gas Central Heater
Installation
Up to

$500 Off

With any new central
gas heater supply and installation*

Limited time only, offer ends .
*Offer to be presented at point of booking or sale. Not to be combined with any other offer.
Trade in your old
System
Up to

$700 Off

With any Air Con or Gas heater replacement installation trade in*

Limited time only, offer ends .
*Offer to be presented at point of booking or sale. Not to be combined with any other offer.
Air Conditioning
Installation
Reverse Cycle Electric AC Heating
Up to

$500 Off

With any new Air conditioning
supply and installation*

Limited time only, offer ends .
*Offer to be presented at point of booking or sale. Not to be combined with any other offer.

Schedule an appointment with
one of our specialists today.

Sydney’s Gas Heating
Replacement Experts

Central gas heating is a super-efficient way to heat your Sydney home. However, old and worn-out heating systems could be adding hundreds of dollars to your energy bills each year. 

If your ducted gas heater has been installed in your home for more than 15 years, it is time to consider a replacement! Replacing or upgrading your ducted gas heater will ensure it’s safe and efficient, keeping running costs down.  

When it comes to upgrading your ducted gas heater, the Alliance Climate Control team is ready to help. Our experienced technicians will inspect your current heating system to find out if it’s more cost-effective to repair or replace. 

With Alliance Climate Control, you’ll benefit from: 

 Wondering how much you could save by replacing your gas heating this year? Book your obligation-Upfront Quote with Alliance Climate Control today. 

Why Choose Us?

Reliability

Air Conditioning service that is dependable, consistent, and responsive every time

5 Star Rated

Over 10,000 happy customers and positive reviews

Relationship

We care about our customers and build long-term relations

Locally Owned

Family owned and operated business

Reputation

Trustworthy, accountable & quality workmanship

Schedule an appointment with
one of our specialists today.

Be quick, get $1200 cash Back with a NEW Natural Gas heater installation*

For a limited time get a cash back when you replace or install a new gas heating appliance

Alliance, cash back on
Gas Central Heating

Up to

$700 Off

When you replace your old heater or install a new central gas heater*

*Offer to be presented at point of booking or sale.

Jemena, get $500 Cash back on your Natural Gas

Up to

$500 Off

Purchase and install your new gas appliance between 1 March 2023 and 31 May 2023, with claims made by 12 June 2023
*Offer to be presented at point of booking or sale.

To claim your Natural Gas $500 Cash Back, you will need to:

For the Cash Back application, we will need to see a copy of the following:

How Long Does a Gas
Ducted Heater Last?

The lifespan of your ducted gas heater depends on how well you maintain and service it. A ducted gas heating system can last anywhere between 10 and 20 years, with the average life expectancy being 15 years. 

There are three key factors that will impact the lifespan of your ducted gas heater:

Quality – Ducted gas heating systems across the market will vary in quality. Opting for a lower-end heating unit may reduce upfront installation costs, but cheaper systems will need replacing sooner. 

Model – The type and model of ducted gas system you choose will impact its lifespan. An undersized heating unit will have to work harder to heat your home efficiently, meaning it will wear out more quickly.  

Maintenance – Proper maintenance is key to the longevity of your gas ducted heater. Annual gas heating servicing and proactive maintenance gives it the best chance at a long lifespan. 

It’s also important to have any issues with your heating system inspected and repaired as quickly as possible to avoid deterioration. Most parts of a ducted gas system can be repaired or replaced easily, which can help prolong the system’s lifespan. 

Depending on your heating unit’s condition, though, it can be more cost-effective to replace the system altogether. The latest gas heating units on the market are far more energy-efficient than older models – meaning the energy savings can quickly balance out the cost of a replacement. 

Wondering if it’s time to replace your ducted system? Give Alliance Climate Control a call to book your assessment and quote. 

Schedule an appointment with
one of our specialists today.

Why Replace My
Ducted Gas Heater?

If your old gas heater is starting to struggle, you may be considering the benefits of replacing it. Up-to-date heating units from Brivis, Braemar and Lennox offer superior performance and energy-efficiency. 

 

Some of the great reasons to replace your gas heating system include:

Modern Efficiency Rating

Old gas heating units have a lower efficiency rating compared to newer models. By continuing to run an old heater, you’ll be missing out on the energy savings up-to-date heating systems offer.

Avoid Repair Costs

If your heating unit is more than 10 years old, key components will be wearing out - and even if parts don’t need replacing yet, they’ll inevitably need fixing over the next 5 to 10 years. It can be far more cost-effective to install a new energy-efficient heater than to keep an old one ticking along.

More Effective & Reliable

Up-to-date gas heating units offer much greater performance, heating your home more quickly and evenly. Especially if your existing unit isn’t sized correctly, you’ll see a drastic difference when you replace it with a modern gas heater.

Environmentally Friendly

In addition to using up to 30% less energy, a modern 6 Star gas heating system emits up to 75% fewer greenhouse gases than electric heating. Upgrading to a new gas heating unit remains far better for the environment than electric heaters.

Safe For Your Family

A more serious concern is whether an old heater is affecting you or your family's health. Carbon monoxide leaks can occur as your heating unit deteriorates, and older ducted heating can also impact indoor air quality. Symptoms of carbon monoxide poisoning include headaches, dizziness, shortness of breath or nausea. In some cases, CO leaks can even be deadly. Many of our Sydney customers choose to replace older heating systems to ensure the family home is a safe environment.

Silent operation

Ducted gas heating systems are some of the quietest on the market. You won’t be disturbed by any noise coming from the system, even if it’s running all day. It’s a comfortable and discreet way to keep your home heated.

If your gas heating system is wearing out, it may pose a safety hazard. Replacing your old gas heating unit with a new, energy-efficient model ensures it’s both safe and cost-effective to heat your home. 

For an obligation-free replacement quote, book an appointment with Alliance Climate Control today. 

Schedule an appointment with
one of our specialists today.

How Do I Know If My
Gas Heating System Needs Replacing?

There comes a time when your run-down heater is beyond repair, or it isn’t cost-effective to fix. But how do you know if it’s time for a replacement? Signs your ducted gas heating may need replacement include: 
  • Repairs are too frequent or too expensive 
  • Energy bills are increasing 
  • Visible damage or wear 
  • Heats slowly or unevenly 
  • Strange noises coming from heater 
  • Gas or carbon monoxide leaks 
  • Temperature needs adjusting constantly
If your heater is experiencing one or more of these symptoms, book an assessment with Alliance Climate Control. Our expert technicians across Sydney can advise whether your system can be repaired, or if it’s better value to replace the heating unit. When your heater is requiring regular repairs, or heating performance has gone downhill, it may be time to bite the bullet and replace your gas heating unit. Upgrading to a new model ensures you’ll be heating your home cheaply, efficiently and safely this winter.  If it’s time to replace your ducted gas heater, the experts at Alliance Climate Control can help. Call us today to book your assessment and quote. 

Why Our Community
Trusts Alliance?

LICENSED & INSURED

Every job is completed under a fully licensed and insured operation. Your home and investment are protected.

Inhouse techs

We never send contractors. The person at your door is an Alliance-trained technician — accountable to us, and to you.

LIFETIME WARRANTY

We back every installation with a lifetime workmanship warranty. If it's our fault, we fix it. Full stop. No asterisks. No excuses.

UPFRONT PRICING

You'll know the full price before anyone picks up a tool. No surprises on the invoice. No awkward conversations at the end.

100% SATISFACTION

If you're not happy, we're not done. We'll come back and make it right — because a job isn't finished until you say it is.

24-HOUR SUPPORT

When your system goes down at 10pm on a Friday, someone actually picks up. Real support, real hours, real people.

2,500+ FIVE-STAR REVIEWS

Not self-proclaimed. Verified by real Sydney homeowners across Google, TrustSpot, and Facebook. See what they're saying.

PROUDLY LOCAL

Sydney-based, Sydney-focused. We live and work in the same suburbs we service — your neighbourhood is our neighbourhood.

Schedule an appointment with
one of our specialists today.

How Much Does It Cost
to Replace a Ducted Gas Heater?

The replacement price of a ducted gas heating unit varies depending on several factors. Luckily, a replacement or upgrade is significantly cheaper than installing a brand new heating system from scratch. 

If you are just replacing a broken gas heating unit, you should already have the ducting, vents and controls in place which will cut back a lot of costs. However, if there are internal parts that are outdated or inefficient, it may be better to replace these. 

Damaged ductwork can undermine the performance of your heating system and increase running costs. However, the lifespan of ductwork is often longer than the gas heater itself, and they can also be patched or repaired. 

The model, manufacturer, and kilowatt output of your new and existing ducted heating system will be the major factor when it comes to cost. 

However, all homes are different, and you’ll want to ensure the heating unit is appropriately sized. This means the best way to determine the cost of replacing your gas heating is to get a personalised quote from a Sydney gas heating professional. 

Our expert team can calculate exactly which gas heating unit is best for your property’s layout. To book your obligation-Upfront Quote, call Alliance Climate Control today.

We Are cm3
Qualified Contractors

Cm3 certification is a Work Health & Safety (WHS) prequalification system. Being Cm3 certified, means our business has demonstrated the highest-level health and safety capabilities as well as having the right insurances and licences to protect our customers. Using a Cm3 certified technician is crucial to ensuring you and your project are in safe and protected hands.

How Much Could You Save By Upgrading
Your Gas Heater?

Ducted gas heating systems are much more efficient, and they’re designed to comply with modern environmental standards. A 6-star rated Brivis gas heater saves Aussie households an average of $567 a year, when compared to old 3-star models. 

If you’re upgrading your gas heater, a higher star rating means it’s more energy efficient – meaning you’ll save more on your annual running costs. While upgrading to a newer model does come at an upfront cost, this is quickly offset by reduced running costs within years.  

The more energy-efficient your new heating unit is, the more savings you’ll keep in your pocket this winter. 

Brivis research shows that on average:

  • A 4 star system uses 13% less energy – annual savings of $236 
  • A 5 star system uses 22% less energy – annual savings of $420 
  • A 6 star system uses 30% less energy – annual savings of $567
     

*compared to a 3-star gas heating unit. 

Don’t pay more than you need to on this year’s energy bills – instead, get a quote on replacing your old gas heating system today. 

Book your appointment with Alliance Climate Control for a personalised quote.

Why Choose Alliance For
Gas Ducted Heater Replacement?

Choosing the Right Ducted Air

When it’s time to replace your home heating system, it’s critical to choose the right contractor. Gas heating systems are complex, and poor installation is one of the leading causes of premature wear and tear. 

 

Poorly installed gas heaters can cause house fires or emit harmful pollutants into your home. The consequences of dodgy installation jobs can even include deadly carbon monoxide leaks. 

 

For complete peace of mind, have your gas heating system replaced by Sydney’s trusted technicians: Alliance Climate Control. With thousands of five-star reviews behind us, you know you’ll be receiving the highest standard of service every time you call us. 

 

Our expert technicians take the time to recommend the best replacement gas heater for your home. You can count on Alliance Climate Control for transparent, accurate quoting, keeping you in the loop about your repair and replacement options.

 

With a 5-year aftercare service and 100% satisfaction guarantee, there’s no time like the present to upgrade your home heating. 

 

Book your appointment with Alliance Climate Control now. 

Schedule an appointment with
one of our specialists today.

Get Ready for Winter With Our Exclusive Online Promotions

Gas Central Heater
Installation
Up to

$500 Off

With any new central
gas heater supply and installation*

Limited time only, offer ends .
*Offer to be presented at point of booking or sale. Not to be combined with any other offer.
Trade in your old
System
Up to

$700 Off

With any Air Con or Gas heater replacement installation trade in*

Limited time only, offer ends .
*Offer to be presented at point of booking or sale. Not to be combined with any other offer.
Air Conditioning
Installation
Reverse Cycle Electric AC Heating
Up to

$500 Off

With any new Air conditioning
supply and installation*

Limited time only, offer ends .
*Offer to be presented at point of booking or sale. Not to be combined with any other offer.

Schedule an appointment with
one of our specialists today.

What Our Community
Is Saying About Alliance

Rolly Dela T.
2 days ago
We had our old Daikin air con replaced by Yunus, Can, Veysel and Brody. These guys were fantastic. Arrive on time and from that first meet have been great to deal with. Very professional and polite. Throughout the process Yunus explained to me what they will be doing and kept me updated. Their workmanship has been great and have laid drop mats to protect the flooring and cleaned up after themselves. Overall awesome work and a very happy and satisfied customer. Well done to Yunus and his team
Gromet
2 days ago
Install of two split system reverse cycle air conditioners. 3.5 and 5.0 kWh. Excellent information provision and quote process. Very responsive to timing needs. Excellent management of entire process including administration, pricing, provision of system, installation, explanation of operation of system, clean up, and follow up. Excellent, considerate workers, very careful and tidy, job completed as agreed. Very good maintenance plan, warranty, and extras.
VIRGINIA B.
3 days ago
Very efficient, friendly & would recommend them for any air conditioning job 😁
James W.
3 days ago
I’m very impressed with Kody’s professionalism during the air-conditioning diagnostic at my apartment. He thoroughly explored all possible options and was careful not to jump to conclusions, which really demonstrated his patience, expertise, and integrity. It was clear he was focused on finding the right solution rather than being money-oriented. The team also went above and beyond by waiving the initial call-out fee due to a booking error, which was a very appreciated and thoughtful gesture. Highly recommend their service. Wishing Kody and the team a Merry Christmas and a Happy New Year! **Adding on post 1st visit** Following my initial review, I had to call Kody back as my aircon started leaking after the first visit. We discussed a repair that might involve cutting into the gyprock to resolve the issue. On the day, Dylan, Colin and Ioannis attended and were extremely professional and accommodating. Instead of immediately cutting the gyprock, they took the time to explore alternative solutions and managed to fix the issue without opening up the ceiling, which I really appreciated. Big shout out to Ioannis as well for offering to patch up some paint on the ceiling free of charge - a very thoughtful gesture. Really impressed with the team’s creativity, professionalism, and willingness to go the extra mile. Highly recommend them. *Adding new review 2026* Charlie, Aaron and Sean has been nothing but professionalism from start to finish. Thanks for your help in squeezing in the last-minute appointment and tackle the unexpected hurdles during your visits. I really appreciate your friendliness, professionalism and workmanship. Cheers guys!
Steve R.
3 days ago
Alliance installed a new ducted airconditioning system with Airtouch 5 control. Very happy with the quality of work and no mess! Thanks to Gokhran, Rodriguez, Gareth and Daniel H.
Andreas O.
3 days ago
All around excellent experience - from Aysa who stopped by a few days ago and discussed the options I had (to replace an AC unit in my apartment) to the installation of same, within a week, by Gokhan and Meedy. Hard-working and diligent fellows all the way to the disposal of the old unit and the clean-up. That company is well-run! Recommended.
Erlinda P.
3 days ago
HIGHLY RECOMMEND FOR ALL YOUR ELECTRICAL NEEDS. Tops! Very Professional! Very Friendly!
chi-kan W.
3 days ago
Your installation has been mostly excellent but very recently I noticed that the condensation has not been flowing into the evaporation tray. There is a short horizontal section of the pipe for discharging the water into the tray but the water, instead of dripping into the tray, tracks backwards and drips onto the floor. I have remedied this by attaching a plastic cone to that short horizontal section. In the future, ensure that the last short section of the pipe SLOPES into the tray to ensure that water doesn't track backwards.
Julia H.
5 days ago
Very happy with the experience - booking/communication/time of arrival and upfront quotes all good. Emre was knowledgeable and a tidy worker. I had two ducted aircon units serviced and some other work to correct previous incorrect installation. So much better now!
Xiaoyuan H.
5 days ago
I had my ducted and split aircon systems serviced by Connor, who was courteous, considerate, and thorough in his work. Alliance’s service fees are on the higher side, but their service quality and diligence is a cut above the rest.
Alma M.
5 days ago
The service was prompt and efficient. Job done in timely manner and left everything very clean.
J T.
6 days ago
Update: I cannot recommend the team from Alliance Climate Control highly enough. JJ attended to provide the quote and was professional, knowledgeable and took the time to understand exactly what I was hoping to achieve. Charles and Sean carried out the installation, adding new power points throughout my old Federation home. They were incredibly professional, courteous and accommodating from start to finish. Every request was met with a positive attitude, and they consistently went above and beyond to make sure everything was exactly where I wanted it. The quality of their workmanship is outstanding. They took great care while working in the house, treated my home with respect, and left every room spotless when they finished. You genuinely wouldn't have known they had been there, apart from the perfectly installed electrical work. It is becoming increasingly rare to come across tradespeople who combine such a high standard of workmanship with exceptional customer service. JJ, Charles and Sean are an absolute credit to the company. If you're looking for electricians who are skilled, reliable, respectful and genuinely care about doing the job properly, I would not hesitate to recommend them. I have also used Alliance Climate Control for my air conditioning installation and ongoing servicing, and I have consistently received the same exceptional level of customer service and workmanship. It's clear that this standard of excellence is part of the company's culture. Alliance Climate Control is truly outstanding. Thank you all for such a fantastic experience. 2 years ago: I had an excellent experience with Alliance Climate Control, thanks to their outstanding service technician, Kyle. He was incredibly professional, explained everything he was doing in a clear and detailed manner, and performed the service with great care and expertise. It’s rare to find such high-quality service these days, and I truly appreciate the effort he put in to ensure my air conditioning units were in top shape. I highly recommend Alliance Climate Control for all air conditioning needs.
Isabella M.
7 days ago
Another wonderful experience with Alliance. This is the second home I’ve had split system air conditioning installed with Alliance and once again they’ve performed superbly. The quote provided was detailed and professional and the installation was seamless. Yunus and his off-sider did the installation for me on this occasion. They were professional, respectful and very hardworking. With Alliance, you get what you pay for -high-end, skilful service and delivery.
Alan G.
1 week ago
All good. very professional. Mitiesh & Brandon
Jugitha P.
1 week ago
Connor did a great job and very patiently provided good explanations for all my questions. Thanks for the great service support.
Kevin W.
1 week ago
Had air con serviced by Cristiam. Very professional and I'm very satisfied.
Teng L.
1 week ago
Highly recommend Alliance Climate Control. They did a fantastic job on my air conditioning system from start to finish. The team was patient, professional, and took the time to explain everything clearly. They also went above and beyond by carefully protecting my furniture during the work and keeping the common areas clean and tidy throughout the installation. It's clear they take pride in both the quality of their workmanship and respecting their customers' homes. Great service, reasonable pricing, and an excellent overall experience. Thank you
Joseph M.
1 week ago
Aaron and Ryan from Alliance Climate Control did a great job installing my new EV charger circuit and new RCBs in the switchboard. They were very prompt and left the site spotless. I highly recommend Alliance Climate Control
Joanne D.
1 week ago
Wonderful and friendly service by Mohamad. He was very helpful with replacing our ceiling fan in our bathroom.
Adrian F.
1 week ago
Very efficient and friendly service from Damon, who took the time to explain everything and provide photos where required. The company's procedures and follow-up were also extremely efficient and well organised. Will definitely use Alliance again when required.

Offer Save up to

$700

With any Air conditioning or Gas heater replacement installation trade in*

Limited time only, offer ends . Not to be combined with any other offer

*Offer to be presented at point of booking or sale.

Request a Upfront Quote