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heating

The heating and cooling of living spaces represents one of the largest energy demands in Australian households, making up approx 35% of the average home’s total energy usage (exc. transportation)


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Whether your goal is to save money, or to reduce your carbon emissions, the best way to heat your living space is likely to be with a reverse cycle air conditioner.  These make use of a ​heat pump and can be 5x more efficient than traditional gas or resistive electric heaters

Based on a room with an area of 40-60m2 requiring a heat output power of 6 kW to effectively heat.  Assume room is heated for 8 hours, and that flued gas efficiency is 60% and unflued gas efficiency is 85%.

Upgrading to an energy-efficient reverse cycle air conditioning system can substantially reduce annual household bills


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Chart footnote
Based on 8 hours of heating per day for 70 days per year using the daily energy statistics in the above chart.  Average grid electricity price assumed to be $0.35 per kWh, average FIT $0.05 per kWh and average price of gas to be $0.0348 per MJ.  Gas appliances assumed to be serviced once every four years and air conditioning once every four years, and at a cost of $200 per service. 
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Using reverse cycle air conditioning for heating also significantly improves indoor air quality and reduces harmful CO2 emissions


Want to learn more?

Download our free Heating 101 Guide today

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Heating | FAQs


General

What is reverse cycle air conditioning?
Reverse cycle air conditioning systems can both heat and cool your home, making them a versatile choice for year-round comfort.
How does reverse cycle air conditioning work?​
It uses a refrigerant to transfer heat between your indoor and outdoor units, providing either heating or cooling depending on the mode.​​
How efficient are reverse cycle air conditioning systems? 
With an efficiency of approx. 400%, reverse cycle air conditioning powered by a heat pump, is the most efficient method of heating, especially if the energy to power the heat pump is sourced from renewable sources. Reverse cycle air conditioning can be over 80% more efficient than flued gas and over 75% more efficient than resistive electric heaters.
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Will a reverse cycle system save me money on my energy bills?
​Using a reverse cycle air conditioner for heating should result in significant cost, and CO2, savings over the life of the asset. Especially when paired with a solar or battery system.
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Heat Pumps

​What factors affect the cost of a reverse cycle system?
Factors like the system's size, brand, features, and installation complexity influence the price.   
Do I need professional installation for a reverse cycle system?
​Yes, professional installation is crucial to ensure optimal performance, safety, and warranty coverage.
How often should I have my reverse cycle system serviced?
You should clean the filter every few months, this should be a simple procedure.  Your installer will be able to give you more detail with respect to the frequency of servicing by a professional. 
Will using reverse cycle air conditioning for heating reduce my C02 emissions? 
Using a reverse cycle air conditioner for heating should result in significant cost, and CO2, savings over the life of the asset. Especially when paired with a solar or battery system.  
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What are the key factors to consider when buying a reverse cycle air conditioning system?
  • Size: Ensure the system is sized appropriately to meet your household's hot water needs.
  • Efficiency rating: Look for a high energy efficiency ratio (EER or COP) to maximize savings.   
  • Noise level: Consider the noise level, especially if the outdoor unit will be near living areas.   
  • Installation location: Ensure there's adequate space for the outdoor unit and proper ventilation.   
What are the health benefits?
Gas heaters can present several safety hazards, especially if they are not properly installed, maintained, or ventilated. Here are some common risks:

1. Carbon monoxide poisoning: Unflued gas heaters, in particular, release combustion byproducts like carbon monoxide (CO) directly into indoor spaces. CO is a colorless, odorless gas that can cause serious health issues, including headaches, dizziness, nausea, and in severe cases, death.

2. Poor indoor air quality: In addition to CO, gas heaters can release nitrogen dioxide (NO2) and other harmful gases that can aggravate respiratory conditions, such as asthma or bronchitis. Moisture from unflued heaters can also lead to dampness, encouraging mold growth.

3.Fire hazard: Poorly maintained or malfunctioning gas heaters can cause fires if there is a build-up of dust or other debris in the heater, or if flammable materials are placed too close to the heat source.

4. Explosion risk: Gas leaks from faulty heaters or improper gas connections can lead to explosions if ignited by a spark or open flame. Ensuring proper installation and checking for gas leaks are essential safety measures.

5. Burns and injuries: Direct contact with the surface of some gas heaters, especially bar heaters or exposed elements, can cause burns. Children and pets are particularly at risk of accidental contact.

Regular servicing, proper ventilation, and ensuring a functional carbon monoxide detector are key steps to mitigating these risks. Flued heaters are generally safer since they vent combustion gases outside the home.

Air conditioners on the other hand generally just require a simple filter clean every 3-6 months, with some people opting for a more fulsome service by a qualified professional every 3-4 years.
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This website is provided for informational purposes only.  It does not constitute advice as to whether you should proceed with installing solar, batteries or other electric items.  You should perform your own due diligence prior to committing to the installation of any new equipment, and seek the opinions of appropriately qualified experts.  The data presented on this website is based on a number of assumptions. If different assumptions were used then the data presented and conclusions reached may differ materially. 
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