As winter temperatures drop, often reaching as low as -15°C to -20°C, homeowners may face the challenge of keeping their spaces warm without stressing the electric bills. And here is the key point – Rinnai Heat Mode presents an efficient solution designed to provide reliable warmth for commercial and residential air conditioning Gold Coast systems. Find out with DEEPCHILL!
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What is Rinnai Heat Mode?
Rinnai Heat Mode is a standard operational setting available on various Rinnai climate control systems, including inverter split systems, heat pumps, and gas boilers. This mode turns the unit into a dedicated heating function, allowing users to set a comfortable temperature range between 16°C-30°C.
For gas boiler systems, it is further divided into Indoor Heating Mode, which uses room sensors and Floor Heating Mode, which controls water temperature for underfloor heating systems.

5 key benefits: why it’s a winter “hidden gem”
Rinnai Heat Mode comes with several advanced features that make it a reliable choice for winter comfort:
- Precise comfort control: This mode can adjust temperature in small 0.5°C steps for more accurate comfort settings.
- Energy efficiency: The system automatically adjusts compressor speed to maintain stable temperatures. Also, it can use up to 40% less energy than traditional heating systems.
- Strong performance in cold weather: JX and VX Series can operate in outdoor temperatures as low as -15°C to -20°C.
- Fast heating: Features like Turbo Mode on split systems and Quick Heat on gas boilers help warm up spaces quickly when needed.
- Anti-frost protection: An automatic defrost cycle helps prevent the outdoor unit from icing up, ensuring stable operation in freezing conditions.

How to turn on Rinnai Heat Mode
For inverter split systems and heat pumps:
- Press the MODE button on the remote until “HEAT” appears on the display
- Adjust your desired temperature using the up/down buttons
- Select fan speed using the FAN SPEED button
- Press ON/OFF to start heating for residential air conditioning Gold Coast
For gas boilers:
- Turn on the power and press the heating button
- When the temperature display blinks, adjust the setting using the control dial
- The combustion indicator will light up once heating begins
Important note from DEEPCHILL
Cold winters don’t just bring discomfort, they can also quietly increase costs in ways many people don’t notice at first. From higher energy bills to extra pressure on your system and even long-term maintenance issues, heating during extreme weather can take a real toll if it isn’t managed properly.
For expert care and reliable servicing, DEEPCHILL, your trusted residential and commercial air conditioning Gold Coast, is here to help you protect your system and keep your comfort consistent through the cold season.











