Aico Smoke & Heat Alarm Installation in Kent

Why we fit Aico

CJA Electrical is an Aico Expert Installer — manufacturer-trained on Aico’s 3000 Series alarm range. We’ve sat the Aico courses, we know the kit inside out, and we fit it as the default for every domestic smoke alarm install we do across Kent.

Aico is the largest UK domestic alarm manufacturer and the brand most landlords, councils, and letting agents want to see fitted. The reasons we standardise on it:

• UK-designed and UK-supported. Spare parts, technical support, and warranty handling all sit in one place
• Genuine 10-year design life on the 3000 Series sealed lithium battery backup — not a marketing claim, an engineering one
• Easymi install ecosystem — accessories, base modules, and interlink modules all snap together
• AudioLINK — the alarm itself logs its own history (battery state, how often it’s been triggered, when it last alarmed), readable through a free app on a smartphone held near the alarm. Useful when diagnosing chirping or assessing an existing system
• SmartLINK — optional gateway that lets a landlord or letting agent monitor the status of every alarm in a property remotely. For agents managing portfolios, this turns “is the alarm still working?” into a dashboard question rather than a property visit

You can have any of this fitted by anyone, but a manufacturer-trained installer is more likely to spec the right grade and category for your building, fit the alarms in the right places to BS 5839-6, and document the system properly.

What grade and category your property needs

BS 5839-6 splits domestic alarm systems into Grades (the technology) and Categories (where alarms go). The combinations that matter:

Grade D1 — mains-wired alarms, each with a sealed tamper-proof rechargeable backup battery (10-year lithium cell). The current Aico 3000 Series is Grade D1. This is the spec for new installs.

Grade D2 — mains-wired alarms with replaceable backup batteries. Older Aico 160 Series installs are Grade D2; the 3000 Series replaces it.

Grade F1/F2 — battery-only alarms. Acceptable in some specific retrofit scenarios but not the spec for new installs in rented or HMO property.

Category LD1 — alarms in every room except bathroom and toilet. Maximum coverage. Required in some HMO scenarios.

Category LD2 — alarms in escape routes (hall, landing) plus rooms with a high fire risk (typically the kitchen, sometimes the lounge). The most common spec for HMOs and rented houses.

Category LD3 — alarms in escape routes only (hall, landing). Minimum acceptable spec for owner-occupied homes built or significantly renovated since 1992.

For most rented homes and HMOs in Kent, the right answer is Aico 3000 Series, Grade D1, Category LD2. For owner-occupied homes, LD2 is the modern recommendation; LD3 is the legal minimum on existing stock.

Heat alarms vs smoke alarms vs multi-sensors

Aico’s 3000 Series gives you three relevant alarm types and the right one in each room matters:

Optical smoke alarms go in escape routes — hall, landing, anywhere you’d cross to get out. Optical detection responds well to the smouldering fires that are common in domestic premises (sofa, bedding, soft furnishings).

Heat alarms go in kitchens and garages. A kitchen smoke alarm is a recipe for nuisance trips on every piece of toast — heat alarms only respond to actual fire-level temperatures, so cooking doesn’t set them off.

Multi-sensor alarms combine optical smoke detection with heat detection in a single unit. Fewer false alarms, faster real-fire response. We use these in living rooms and dining areas where there’s a fire risk (real fires, candles, electrical equipment) but not the constant hot air of a kitchen.

Carbon monoxide alarms are required separately under different regulations (the Smoke and Carbon Monoxide Alarm (England) Regulations 2015 and 2022 amendment) wherever there’s a fixed combustion appliance. Aico CO alarms can interlink with the smoke/heat system, so a CO event triggers the whole house alert — not a separate localised beep nobody hears.

Interlinking — hard wire or RF

Two ways to interlink the alarms so one going off triggers all of them:

Hard-wired interlink — a third “interconnect” core in the cable between alarms carries the trigger signal. Reliable, no batteries to fail, but means running cable to every alarm location. New builds and significant rewires use hard-wired interlink almost universally.

Aico RF interlink — alarms talk to each other wirelessly via Aico’s RF radio module that clips into the alarm’s base. No interconnect cable required, which makes retrofits in occupied properties dramatically easier (no chasing walls, no lifting floors). The RF module uses a sealed lithium cell with the same 10-year design life as the alarm.

For retrofit installs in Kent’s older housing stock — Victorian terraces in Rochester and Chatham, Edwardian property in Maidstone, period stock in Canterbury — Aico RF interlink is usually the right answer. The alarms still need a permanent live for the mains supply, but the interconnect is wireless. Avoiding the chasing-and-making-good cost on a period property is significant.

SmartLINK — for landlords and agents managing portfolios

If you’re a landlord or letting agent with multiple properties, Aico SmartLINK is worth a specific mention. It’s a small gateway device installed in the property (no broadband at the property required — uses cellular) that reports the status of every Aico alarm to a portal. The alerts you actually care about:

• An alarm has been triggered (and was it smoke, heat, or CO)
• A unit has reached end-of-life and needs replacing
• A unit has been removed
• An RF interlink has lost contact with another unit

Plenty of letting agents in Kent have switched to SmartLINK for HMOs and higher-value rentals because it converts “annual alarm check visit” into “remote dashboard”. CJA Electrical can spec, install, and commission SmartLINK gateways alongside a new alarm system, or retrofit them onto an existing Aico install.

Smoke alarms in rented property

Different rules apply to private rented sector and HMO property in England.

Private rented sector (single household): Under the Smoke and Carbon Monoxide Alarm (England) Regulations 2022, every privately rented home needs at least one smoke alarm on every storey with a habitable room, plus a CO alarm in any room with a fixed combustion appliance (excluding gas cookers). Alarms must be working at the start of the tenancy and the landlord must repair or replace them when notified of a failure. The 2022 amendment strengthened the regime — fines up to £5,000.

HMOs have additional layered requirements depending on size and the council’s approach. The default is at least Grade D1 LD2 — mains-wired interlinked alarms in escape routes plus high-risk rooms. Larger HMOs may need a higher spec system with central panel, manual call points, and emergency lighting (which is its own service — see emergency lighting).

Selective licensing zones in some Kent council areas can impose a defined alarm specification as a licence condition, often equivalent to or stricter than the HMO baseline. Where it applies, the council will specify what they want.

CJA Electrical can spec Aico to whatever your property and council require. If you’re not sure, the council’s housing or environmental health team is the authoritative source.

What an Aico install actually looks like

Typical install for a 3-bed Kent house being upgraded from old battery-only alarms:

1. Site visit to walk the property, confirm where alarms need to go, and pick the right Aico 3000 Series mix (optical / heat / multi-sensor / CO)
2. Specification quoted — count of alarms by type, locations, interlinking method (hard-wired or RF), SmartLINK if relevant, fixings, any making-good
3. Installation in a single visit for most homes. Power is briefly off while we wire to a permanent live (usually a lighting circuit). Aico bases are fitted to the ceiling on the manufacturer’s bracket
4. RF modules clipped in (or hardwired interconnect terminated) and the alarms commissioned. The system goes through Aico’s startup sequence, learns its mesh, and we test the interlink across every unit
5. Test, demonstration, and certificate. We test each alarm individually, the interlink, and the CO alarm if fitted. Hand over the certificate plus a brief on weekly testing and what to do when a unit reaches end-of-life

Total install time for a 3-bed home: half a day for an RF retrofit, a full day if hardwired interconnect cable runs are involved.

Maintenance and end-of-life

Once installed, an Aico system needs:

• Weekly test — press the test button on any alarm. The whole system should sound (interlink test). Householder does this themselves.
• Annual function test by a competent person on rented and HMO property (and a sensible practice on owner-occupied homes). We can do this on systems we’ve installed and on systems by other installers.
• AudioLINK download if you suspect a unit is misbehaving — pulls the alarm’s own history into a phone app, often diagnoses the issue without removing the alarm.
• Replacement at end-of-life — typically 10 years for Aico 3000 Series. The alarm itself reaches end-of-life; it’s not just a battery question. End-of-life is announced clearly by the alarm itself in its final months.

Coverage across Kent

Aico smoke and heat alarm installation across Medway, Maidstone, Gravesham, Swale, and Canterbury — full list on the where we work section. Heaviest demand is from HMO landlords and letting agents in the Medway towns and Maidstone, where the housing stock and rental market both lean toward shared occupancy. Same-week appointments are typical; for portfolios with multiple properties needing alarm upgrades together, we batch the bookings to keep the cost down.