Red Heat Alarm 240V AC Mains Power Interconnectable

Code: RHA240SL
  • Certified to Australian Standard AS1603.3:2018
  • 10 year sealed lithium battery
  • 90 day money back guarantee
  • 5 year full product warranty
  • Free shipping for all orders over $200
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In Stock
Australian Standard LogoAS3876:2014
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Red heat alarms are a high quality heat detector with excellent after sales customer support. They are designed to activate when the temperature reaches 55ºC – 59ºC in a room. Heat alarms are to be used as supplementary devices added to an existing smoke alarm network. Heat alarms are more suitable for locations which are susceptible to frequent nuisance alarms, such as kitchens (smoke from cooking) or garages (car exhaust fumes).

  • 240V AC Main Power Heat Alarm – certified to Australian Standard AS1603.3:2018
  • Interconnectable with 40 other Red brand heat and smoke alarms using the RHARFM RF Module (sold separately)
  • 90 day guarantee – change your mind for any reason? No worries! Return to us for your money back – no questions asked!
  • 5 year full product warranty
  • Model: RHA240SL
  • Suitable for compliance with the NSW Short Term Rental Accommodation Fire Safety Standard
  • Excellent after sales support – see our 5 star google reviews below!


Alex Bass
Alex Bass
Amazing customer service and a great product. Delivery was on time highly recommended
Jye Halsall
Jye Halsall
Excellent customer service by Christian. Very happy with the product!
Barbara Morris
Barbara Morris
Absolutely great service, speedy postage and staff very helpful. Very happy with our purchase and anyone wishing to upgrade their present smoke alarms we would definitely recommend Photoelectric Smoke Alarms, thank you Christian for your wonderful and personal service and aftersale service.
Crisanne Fox (Crisanne's Colouring)
Crisanne Fox (Crisanne's Colouring)
Fantastic service with excellent knowledge on what I needed for my smoke alarms!! Postage was quick, ordering was easy and the product is exactly what I need!! I would highly recommend getting your smoke alarms from this company and I will always use them in the future!!!!
Jason Lang
Jason Lang
Exactly what I was looking for, great product and price, fast postage. Good personal old fashioned service, very happy. Thanks Christian.
Free Spirit
Free Spirit
Top service and speedy dispatch. It was a pleasure dealing with this company. Highly recommend.
Darren Farrugia
Darren Farrugia
I was unsure what setup was best for my place, so I rang them. Spoke with Christian and he guided me in the right direction. I ended up getting the Red Wireless Smoke Alarm bundle when they were on special. Really good price for the product. They were delivered promptly and exactly as described. Thanks Christian for letting me pick your brain. They're exactly what I wanted.
Ben Guard
Ben Guard
Very happy with the customer service provided and the prompt delivery! Easy to fit and if / when it's needed, the hush feature will be a blessing.
Anthony Dowley
Anthony Dowley
Good friendly service from Photoelectronic Smoke Alarms Australia. Website is easy to understand and I feel confident I know whats required of me for my real estate to comply with the new smoke alarm requirements for QLD. I decided to call the company and spoke with Christian, he was great to talk with and gave me confidence to purchase their Photoelectronic Smoke Alarms. Christian was also able to recommend an installer.
Edward Cole
Edward Cole
Quality products, and fantastic customer service, went out of there way to make sure i had all the relevant information. Highly recommend

Download RHA240SL Datasheet

Shipping & Delivery


Our shipping flat fee is $14.95 for orders Australia-wide.

FREE SHIPPING! is automatically applied to all orders over $200

Estimated dispatch within 24 hours during business days only.


All orders are shipped from our QLD warehouse. Our delivery partner will email a tracking number which can be used to monitor delivery progress.

All orders require a signature upon delivery. If you are not home to accept delivery, a calling card will be left to make alternative delivery arrangements.

Additional information



Rated Supply Voltage

220…240 V AC

Backup Type

3V Lithium Battery

Battery Life

10 Year

Output Voltage Limits

Interconnection : 6.5…12V
Low battery at 2.6…2.8V

Detection Type

Thermistor – Activates at 55-59°C

Function Available

Hush Function
Self-test of fire detection
Local alarm

Control Type

Button for test / hush function

Number of Devices

Up to 40 pieces

Response Time

Approx. 1s

Noise Level

85 dB at 3m minimum

Time delay range

10 min for hush

Local Signal

Sound : Alarm
Sound : Signal
Visual : 1 LED (green) for On status
Visual : 1 LED (red) for warning and low battery

Type of Installation


Device Mounting


Mounting Support


Fixing Mode

By screws






5 Year