Medium Property Fire Alarm Kit — Mains (Grade D1)
A complete mains-powered fire alarm kit for two-storey homes (typically 2–3 bedrooms).
- Sealed 10-year battery backup — no battery replacement, minimal maintenance.
- Smoke and heat alarms are hardwire interlinked by your electrician during installation. Standalone CO alarm sounds locally (this is fully compliant).
- Want the CO alarm linked to the system, and/or to make it easier to add alarms in other areas later? Choose the Mains with Wireless Interlink version instead — that kit includes RF modules that interlink all alarms wirelessly.
- 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).
£97.40 (inc VAT: £116.88)
Medium Property Fire Alarm Kit — Mains (Grade D1)
£97.40 (inc VAT: £116.88)
- What's in the Box
- Suitability
- Installation
- Carbon Monoxide Protection
- Regional Compliance
- Additional information
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 (standalone) (1 × DHI-HY-GC20D)
Suitability
This kit is suitable for two-storey houses and medium-sized homes, new installations and upgrades to existing properties, and properties where a fixed mains-powered system 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, alarms interlinked at installation so all occupants are alerted simultaneously, and carbon monoxide protection as standard.
It is based on the same approach used in residential fire alarm installations across the UK and provides reliable long-term protection with minimal maintenance.
Installation
This is a mains-powered Grade D1 system. Connection to the mains supply requires a qualified electrician.
The smoke and heat alarms are then interlinked by your electrician, via a hardwire interlink connection, so that when one alarm activates, all alarms sound simultaneously throughout the property. This gives everyone the maximum possible time to escape.
If you are installing in an existing property where running an interlink connection between alarm positions is not practical, see the Mains with Wireless Interlink version of this kit, which uses RF modules to interlink the alarms wirelessly instead. You may also prefer that version if you would like the CO alarm linked to the system, or the flexibility to add further alarms later without new cabling. [/medium-property-fire-alarm-kit-d1-wireless/]
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 operates as a standalone device — it sounds locally when carbon monoxide is detected. This is normal and fully compliant; CO alarms are not required to be interlinked anywhere in the UK. If you would prefer the CO alarm to be part of the interlinked system, choose the Mains with Wireless Interlink version. [/medium-property-fire-alarm-kit-d1-wireless/]
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 — once the alarms in this mains kit are interlinked at installation, it 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 with Wireless Interlink (Grade D1)
£150.99 (inc VAT: £181.19)
Small Property Fire Alarm Kit — Mains (Grade D1)
£78.29 (inc VAT: £93.95)