What are the options to electrify my gas heating ?

Gas heating is used extensively in Boroondara particularly during the colder months.  Electrifying your gas heating using heat pump technology results in a more efficient, cost effective and environmentally friendly solution.    

There are a few things to consider based on your individual circumstances and there are some easier first steps that you can take to start the journey.

There are a number of old gas heating solutions that have been deployed in the past:

• Ducted systems with vents in individual rooms

• Space heaters deployed in fireplaces or wall furnaces.

• Hydronics systems with panels or slab heating

It should be noted that all heating solutions are less effective in drafty or poorly insulated homes, so it’s advisable to assess and improve the building envelope to meet a minimum insulation standard, regardless of your heating choice.   Some gas heaters can be unhealthy or dangerous due to gas or flue leaks and should be regularly maintained, carbon monoxide from poor combustion can be a significant safety issue.

Zoning your home can significantly improve energy efficiency and reduce costs. Heating only the areas you frequently use—such as living spaces in the evening and bedrooms before bedtime—can minimize waste. Newer systems may have more zoning capabilities compared to older ones.

Set your thermostat to warm your house for times you need it. Turn it off overnight and when you’re away from home. You can save money by setting the thermostat on your heating between 18°C and 20°C as every degree you increase your heating can add up to 10% on your energy use.  Likewise If you use an air conditioner in summer, use it only when necessary and set the temperature between 25 and 27°C as every degree higher can save between 5 and 10% on your energy use. (refer www.energy.gov.au)

If your gas heater fails, it may serve as an opportunity to electrify your home’s heating system. Whether you repair or replace the existing system, having a plan in place is important. 

Many homes already have Reverse Cycle Air Conditioning systems (“RCAC”s) installed for cooling but residents may not realise that most, particularly more recent models, are also very effective and efficient heaters. In many cases simply using the RCACs for heating will reduce costs and environmental impact.  If you have both gas heating and RCACs then you can experiment with the thermostats to maximise the use of RCAC while maintaining a comfortable environment in conjunction with the gas heater.  Note that RCACs may have filters that need to be cleaned regularly.

Usually, the most cost effective and efficient solution to fully electrify your home is to deploy heat pump technology with multiple split systems through the home before decommissioning the gas heating system. Key considerations include sizing and placement of both indoor and outdoor units. While indoor units are usually mounted high on walls, floor-mounted or slimline options are also available.

Split systems can be deployed in stages—starting with a single system in high-use areas—allowing you to reduce gas dependency without fully decommissioning your gas system. Keep in mind, some government subsidies require the removal of gas appliances to qualify.

Split systems are easily zoned and often integrated with smart controllers or mobile apps for flexibility and convenience. Additionally, they can be installed quickly, making them an ideal option if your gas system fails unexpectedly.

It is noted split systems may take longer to heat a space than the old gas heater and that some residents don’t like split systems blowing warm air which might feel cool.  This can often be addressed through timers and WiFi controls, allowing you to preheat your home before you wake up or return after an absence.

There may be remediation works after electrification to cover old duct outlets and returns, and remove flues.

There are potential solutions for split systems reusing the old floor or ceiling ducts, or hydronics solutions. Split systems are usually the most efficient and cost effective as ducted and hydronic heat pump are usually bespoke and more expensive but may suit some situations and preferences.