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Battery Heat Alarm - First Alert HA300

29 Customer Reviews
1 unit 2+ units 5+ units

£10.79 inc VAT

£8.99 ex VAT

£10.55 inc VAT

£8.79 ex VAT

£10.43 inc VAT

£8.69 ex VAT

Product Overview

The First Alert HA300 is a 9V battery powered heat alarm with test and hush button feature. Designed to detect increase in room temperature, the HA300 sounds a loud 85dB audible alarm when activated, and is ideal for use in kitchens and garages.

  • Battery: 9V alkaline battery included
  • Warranty: 5 year warranty
  • Please note that BRK and First Alert are no longer manufacturing new stock for the European Market and while the products may have a 2018/19 manufacturing date they still provide a full 10 year lifespan and full warranty cover from date of purchase
  • Test and hush button feature
  • CE marked
  • Suitable for installations complying to BS 5839-6: 2019 Grade F2
  • 85dB audible alarm upon activation
  • Ideal for kitchens and garages where a smoke alarm would be prone to false triggering
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
  • Product warranty and life commences from date of purchase
Technical Data
Product Code 1AHA300CBUK
Alternative Product Codes HA300, HA300CBUK, HA300Q
Brand First Alert
Battery Type

9V Alkaline

Dimensions (HxDia)


Operating Temperature

+54°C to +70°C

Relative Humidity

15% to 85%

Sound Output



5 years

Weight 0.24kg
Product Datasheets
FAQs (9)
Q. How do you open the alarm for a battery change?

Find the little arrow at the side of the alarm and pull the lid off the base in the direction of the arrow. This takes quite a bit of force. The lid swings open on a hinge.

Q. What smoke alarm should I use in a bedroom with an en suite bathroom?

It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.

Q. How do I safely dispose of my old smoke alarms?

Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit

Q. is there a different alarm sound for optical and heat sensors to tell you the difference in what kind of fire it is?

There is only one alarm sound type when a fire is detected, when interconnected all smoke and heat alarms will sound. However only the triggered alarm will have a rapidly flashing red indicator.

Q. How long do the batteries last in smoke alarms?

The 9V alkaline batteries last 12-18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.

Please Note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

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Pricing & Availability

Model Stock 1 unit 2+ units 5+ units
Product Code: 1AHA300CBUK Stock Level:
More than 20 in stock Expected dispatch: Today
1 unit

£10.79 inc VAT

£8.99 ex VAT

2+ units

£10.55 inc VAT

£8.79 ex VAT

5+ units

£10.43 inc VAT

£8.69 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.79 inc VAT - Orders will be delivered in 3-5 working days by Hermes

Express Delivery

£7.91 inc VAT - Orders will be delivered in 1-2 working days by DHL

Customer Reviews

29 customers have given this product an overall rating of 4.6 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: C B

Easy to install, small and unobtrusive device.

Published on: 3rd July 2020

Rating: 5 / 5 Stars

Reviewed by: A C

Does the job

Published on: 22nd December 2019

Rating: 4 / 5 Stars

Reviewed by: A H

dose what it%u2019s supposed to fought by mistake now I have it i didn%u2019t realise i needed it

Published on: 20th October 2019

Rating: 4 / 5 Stars

Reviewed by: M S

easy to install

Published on: 7th October 2019

Rating: 5 / 5 Stars

Reviewed by: J M

Seems great Only a couple of months old but straightforward to fit and seems good quality.

Published on: 7th October 2019

Rating: 4 / 5 Stars

Reviewed by: A M

Works well,fairly discrete

Published on: 1st September 2019

Rating: 5 / 5 Stars

Reviewed by: J F

hopefully I will never need to experience the need to have use of the alarm

Published on: 15th April 2019

Rating: 5 / 5 Stars

Reviewed by: S M

Great product Adhesive tape should be included

Published on: 13th April 2019

Rating: 5 / 5 Stars

Reviewed by: J B

As advertised

Published on: 16th March 2019

Rating: 5 / 5 Stars

Reviewed by: J L

Excellent product from a Great company Always deliver an excellent product at a competitive price with fast delivery.

Published on: 30th January 2019

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