Combination Alarms

A combination alarm is a single detector that senses both smoke and heat, so one device can do the job of two in the right location. We currently stock a battery-operated combined smoke and heat detector powered by a sealed 10-year battery, which needs no wiring and suits quick retrofits in homes and small premises.

Trade customers can order at trade prices, with next working day delivery across NI and ROI for in-stock items ordered before the 5pm weekday cut-off.

HSA/PH/10 In-Stock

Battery Operated Combi Smoke & Heat Detector powered by a 10 Year Battery

£34.20 inc. VAT

When to choose a combination smoke and heat alarm

A combined smoke and heat detector monitors for both smoke particles and rising temperature, giving earlier warning of a range of fire types from one ceiling position. It can reduce the number of devices in a small property, but it is not a universal replacement for dedicated alarms.

Where combination alarms work well

Living rooms and hallways where both smouldering and fast-flaming fires are possible
Small flats, holiday homes and annexes where fewer devices are preferred
Retrofit jobs where running cable for mains alarms is not practical

Where a dedicated alarm may be better

In kitchens, a combined unit's smoke sensor may cause nuisance alarms from cooking, so a dedicated heat alarm is normally the safer choice there. Combination smoke and heat alarms also do not detect carbon monoxide, so rooms with fuel-burning appliances still need a separate CO alarm.

Sealed battery considerations

The model we stock runs on a 10-year sealed battery, so there are no battery changes during its life and the whole unit is replaced at the end. This is convenient for landlords and property managers. If a project requires mains-powered, interlinked alarms, for example in a new build, look at our mains smoke alarms instead and check current building regulations.

Fitting tips

Mount on the ceiling, ideally near the centre of the room and away from walls, light fittings, air vents and bathrooms. Test the alarm once fitted and regularly afterwards using the test button, and note the replacement date on the unit.

With 5,000+ products in stock across 100+ trade brands, we can supply your alarms alongside the rest of the job. Orders over £30 / €35 ex VAT ship free, and you can Click & Collect from our Cookstown trade counter.

FAQ's Ask Your Own Question

Is a combined smoke and heat alarm better than separate alarms?: Not always. A combined alarm saves devices and covers more fire types from one point, which suits living areas and small properties. Separate alarms give more control over where each sensor goes, for example a heat alarm in the kitchen to avoid cooking false alarms. The right choice depends on the room and any regulatory requirements.
Does a combination smoke and heat alarm detect carbon monoxide?: No. A smoke and heat combination alarm detects smoke and temperature only. Carbon monoxide is an invisible, odourless gas that needs its own electrochemical sensor, so you will still need a CO alarm in rooms with boilers, stoves, open fires or other fuel-burning appliances.
Can a combination alarm be used in a kitchen?: It is usually not recommended. The smoke sensor in a combination unit can react to cooking fumes and steam, causing nuisance alarms that may lead occupants to disable it. A dedicated heat alarm is normally specified for kitchens. Check the manufacturer's guidance for any model before fitting it near a cooking area.
How long does a 10-year battery combination alarm last?: A 10-year sealed battery alarm is designed to run for around a decade from activation, after which the whole unit should be replaced. The battery cannot be changed. Most units display a manufacture or replace-by date and give an end-of-life warning, so record the installation date for future reference.
Can a battery combination alarm be interlinked with other alarms?: Only if it is designed for it. Standalone battery alarms sound on their own, while radio-frequency models can interlink wirelessly with compatible alarms from the same manufacturer. Check the product details before buying if every alarm in the property needs to sound together.
Do I need an electrician to fit a battery combination alarm?: No electrical connection is required for a sealed battery alarm, so it can normally be fixed to the ceiling with screws and activated as per the instructions. Mains-powered alarms are different and should be installed by a competent person in line with current wiring regulations.