Medium Property Fire Alarm Kit — Mains with Wireless Interlink (Grade D1)
A complete mains-powered fire alarm kit for two-storey homes (typically 2–3 bedrooms), with wireless interlink included.
- Sealed 10-year battery backup — no battery replacement, minimal maintenance.
- Includes RF modules that interlink all the alarms, including the CO, wirelessly — no interlink wiring needed between them.
- Already have interlink wiring, or happy for the electrician to wire the interlink? The standard Mains (Grade D1) version, without modules, may suit you.
- Fuel-burning appliances in more than one room? You’ll need an extra CO alarm for each additional room. In Wales, this also applies to rooms with gas cookers.
- Scotland: homes also need a smoke alarm in the main living area (one per living area if there’s more than one).
- Installation requires a qualified electrician (mains connection)
£150.99 (inc VAT: £181.19)
Medium Property Fire Alarm Kit — Mains with Wireless Interlink (Grade D1)
£150.99 (inc VAT: £181.19)
What's in the Box
- 2 × Wisualarm mains smoke alarms for the hallway and landing (2 × DHI-HY-SA5MA)
- 1 × Wisualarm mains heat alarm for the kitchen (1 × DHI-HY-HT5MA)
- 1 × Wisualarm carbon monoxide alarm with wireless interlink (1 × DHI-HY-GC20D-R8)
- 3 × Wisualarm RF wireless interlink modules (one per fire alarm) (3 × DHI-HY-MRF50-R8)
Suitability
This kit is suitable for two-storey houses and medium-sized homes, existing properties where running an interlink connection between alarm positions is not practical, new installations and upgrades, and properties where a fixed mains-powered system with wireless interlink is preferred.
It provides LD2 level of protection: smoke detection in escape routes such as hallways and landings, and heat detection in high-risk areas such as the kitchen. This is the standard level of protection for most UK domestic properties.
For a full breakdown of typical system layouts by property type, see our Fire Alarm Systems by Property Type guide. [/fire-alarm-systems-by-property/]
This kit follows a standard UK domestic fire alarm layout for medium properties: smoke detection in escape routes such as hallways and landings, heat detection in the kitchen, all devices interlinked wirelessly via the included RF modules, and carbon monoxide protection as standard.
It combines the reliability of a mains-powered Grade D1 system with the flexibility of wireless interlink, making it suitable for both new installations and retrofits where running an interlink connection is not practical.
Carbon Monoxide Protection
A carbon monoxide (CO) alarm is included as standard. CO alarms are recommended for any property with a fuel-burning appliance such as a gas boiler, oil boiler, wood-burning stove or solid fuel fire.
In this kit the CO alarm is interlinked with the smoke and heat alarms, so when it detects carbon monoxide, all alarms in the property sound together.
One CO alarm is included. Properties with a fuel-burning appliance in more than one room will need an extra CO alarm for each additional room (available to add to your order).
England: a CO alarm is required in any room with a fixed combustion appliance (for example a gas boiler, oil boiler, wood-burning stove or solid fuel fire). Gas cookers are excluded.
Wales: a CO alarm is required in any room with a gas, oil or solid fuel appliance — and, unlike England, this includes rooms with a gas cooker.
Scotland: a CO alarm is required in any room with a carbon-fuelled appliance or a flue.
If you are unsure how many CO alarms your property requires, the System Finder will confirm this based on your property details.
Regional Compliance
England: this kit meets standard LD2 domestic fire alarm guidance for medium properties. A carbon monoxide (CO) alarm is required in any room with a fixed combustion appliance (excluding gas cookers).
Wales: rented homes must have mains-connected, interlinked smoke alarms on each storey — this mains kit, with its included RF modules, meets that requirement. A CO alarm is required in any room with a gas, oil or solid fuel appliance, and unlike England this includes rooms with a gas cooker.
Scotland: all homes must have a smoke alarm in the main living area (one per living area if there’s more than one) in addition to the escape route detection included in this kit. Additional smoke alarms are available separately and can be added to this kit to meet Scottish requirements.
Note: the mains interlinked alarms provide compliance. Any additional battery alarms added in other rooms are extra protection on top of the required system, not a substitute for it.
More Kit products from Wisualarm by Dahua
Large Property Fire Alarm Kit — Mains (Grade D1)
£123.75 (inc VAT: £148.50)
Large Property Fire Alarm Kit — Mains with Wireless Interlink (Grade D1)
£192.79 (inc VAT: £231.35)
Medium Property Fire Alarm Kit — Mains (Grade D1)
£97.40 (inc VAT: £116.88)
Small Property Fire Alarm Kit — Mains (Grade D1)
£78.29 (inc VAT: £93.95)