Ducted Gas Heating Replacement

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Get Ready for Winter
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Gas Central Heater
Installation

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$500 Off

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gas heater supply and installation*

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System

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Air Conditioning
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Reverse Cycle Electric AC Heating

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supply and installation*

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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

Alliance cares 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 techs for your protection​

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Inhouse trained techs, we don't use contractor​

Upfront & honest
installation quotes

After care, Lifetime workmanship warranty*

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We go the extra mile & focus
on the small details

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100% satisfaction, or we'll be back to make it right!

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

Alliance Climate Control - Heating, Cooling, Electrical
Based on 2238 reviews
Lorraine S.
Very efficient and professional service from the team at Alliance. I would highly recommend for your Air Conditioning needs.
Deborah C.
I now have working central gas heater system after Brivis had been such a great system for me for the last 24 years. Lets hope I have another 25 years with no problems.
Mel S.
The team was friendly, efficient, and highly professional throughout the installation of our air conditioner. Everything ran smoothly, and we couldn’t be happier with the result. A special shout out to Jiayi Gino who managed the project and the team. Highly recommended!
Lisa H.
Vy, Luan and Kim spent two days replacing our out dated air-conditioning unit dealing with issues with the tight installation space. I was kept informed the whole time in any issues they had and they were really polite and respectful. They did a great job in cleaning up after they finished. Very happy with their work
Leslie B.
Jonathan, Peter, Adrian and JJ installed a couple of air conditioners at my home. Polite and professional, they consulted me at each decision point, offering options and recommendations during the installation process. I highly recommend them.
Update 15/8/25: while comparatively expensive to others, I think it's fair price given the quality and depth of backup service. I've had some issues with the units, but they were resolved. Recent servicing and support from Damon was was superb.
Jola S
Very happy with the quick turn around of a fairly complex job. The crew were friendly and very polite and explained everything clearly. Once the job was finished the clean up was thorough and they left my pace immaculate. Definitely would recommend the service
郭凯
Excellent work on site. Teams are very kind and good communication as well. The after job clean made my kids thought they were never been here.
Maurice N.
Outstanding staff. Punctual, clean, knowledgeable and efficient.
Bill P.
Excellent service and great communication by BJ, Christian,Peter, Blade , Harry, Liam, Will & Marion
John O.
Very happy with the A/C service provided by Alliance. Their service technicians are always polite, respectful and professional.
Anna & J.
The Team from Alliance were everything you need from trades. I was able to get an appointment within the week to assess what was wrong with air conditioning. Then when it came to installation they were flexible enough to shift the date due to wet weather which would have meant 5 days with no heating. Everyone was always polite and explained everything thoroughly. Site clean up was exceptional. I would Definitely recommend to a friend.
Ruby C.
Very thorough, good listener and very professional. I'm grateful.
Patricia F.
Hi this morning I had Tegan from Border Heating and cooling come to my home to assist me with problems with heating my home. Tegan is so knowledgeable about all products and helped me so much. Tegan gave me very good tips and information to help, and was so honest with that advice, that will cost me much less than I thought. Thank you Tegan for all your advice and help today, I have a plan ahead now and it’s well in my budget. I am a return customer for Border Heating and Cooling in South street Wodonga, I have only great things to say about this business, and would recommend them to anyone needing assistance with heating and cooling their property.
Gary C.
Clearly explained procedures and fast, prompt and friendly service.
Sally M.
Andre did an incredible job servicing our air con units today. Nothing was any problem, he was efficient, on time, left the place sparkling and is a very nice person as well!
patricia A.
We are impressed with the work done in
Ducting and installation of cooling heating unit in our place. The house was cleaner after the completion of the work than before. Highly recommended the team of Matt Benjamin Ahmad and Qais.

In addition. They explain very well how to operate the control. Very friendly team .
Will M
Great people to deal with, great product and top workmanship. I’m very happy with the AC installation thanks to James G, BJ, Qais A, JJ and Charles.
Hayley D.
Fantastic service from start to finish.
Kind, polite, professional team members who explained the work to me so I understood all charges. So clean too. Strongly recommend. So glad I found you guys - thank you so much. I’ve never felt so cosy upstairs thanks to finally fixing my ac unit.
Brett L.
Have been using for many years now. They always arrive within the allotted time, explain the different options and do a thorough job whether a service or clean
Camilo V.
Recently, Alliance installed a full ducted air conditioning system in my apartment, replacing the existing split system. They helped me to choose the perfect system for us, were able to use some of the existing infrastructure, which helped avoid any damage to the common property areas of the building.

Their proposed solution was excellent, and they handled all technical challenges with professionalism, giving me great confidence in their work. Gareth and his team were fantastic—careful, respectful, and left everything spotlessly clean.

The plasterer, Harry, was incredibly precise and did an outstanding job. We couldn’t be happier with the result and are really glad we chose Alliance. It was a great decision.
John S.
Really happy with the service done by Alliance's technicians. Very prompt, responsive and polite. They even came with boots cover to keep our place clean and tidy when they came and do our AC service and maintenance. Thanks Shazim!

Was so happy with their service, we decided to use them again for another installation. B.J. and Christian were very prompt, kept the place clean and tidy and the whole installation process was very smooth. Thanks again guys!
Daniel M.
Galvis did a great job of explaining all the options and was able to complete the work in a timely manner. Thanks!
Mathew C.
Awesome job, and great clear communication. Thank you to the technican’s who attended Dan and Nik

Mat
paul M.
I would like to say a big thank you to the team at Alliance.
This is how a company should operate. Professional, Courteous, Helpful in all details from the quote supplied by Shazim, to the installation team lead by Matt, Benjamin, Ahmad, Qaig and Casper. They had to perform their work in very trying conditions due to persistent heavy rain. The installation process lasted 3 days. What impressed me was their work ethic and attention to detail. We have had numerous trades people to our house and this team is right up there with their workmanship. I would also like to thank Michael and James who are the operations experts , who responded to my query within the hour. They arranged for Andres from Alliance to be at my house within the hour and the matter was resolved . I have no hesitation in recommending Alliance.
Bon S.
Very happy with the Alliance team, who installed a multi head A/C (three indoor units) at my home.

We knew from the outset it would be a difficult installation due to my apartment's layout, but the installers managed to complete the work efficiently, and did a very neat job. They were friendly and professional to deal with, taking the time to explain everything they were doing and ask lots of questions to ensure I was happy with the placement of all components. They were also careful to protect my floors and furniture from dust, and cleaned up thoroughly when they were done, leaving everything looking immaculate.

Highly recommended.
Sarah F.
Thought the reviews were too good to be true, but I would add my good review to this. Very thorough, helpful and efficient! Highly recommend
david K.
Dan and Nik did a great job. Special thanks to Alex for taking the time to fix a niggling noise issue. Happy to recommend.
Mel T.
Great service. Listens to concerns and checked everything out. Went above and beyond to ensure the air con system was running to optimum performance.
John C.
Qais & Sayed & Maisam were very professional and lovely people to work with
Everything was explained well and they worked to get the job done efficiently
Greg M.
BJ, James, Ahmad Gais and all the other guys did an amazing job organising and installing the system flawlessly and neatly so the unit is barely noticeable inside and cleverly installed outside with power supplied inside the wall cavity with minimal exterior visibility. As an engineer myself I was impressed with their efficiency and polite manner and patient explanations and discussions of our needs. Good job guys.!

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