Gas fire service and safety check across London

Decorative gas fires, balanced-flue glass-fronted units, and log-effect inset fires share the same regulatory home as a boiler. They are gas appliances under the Gas Safety (Installation and Use) Regulations 1998, must be inspected by a Gas Safe registered engineer once a year, and fall under the same GIUSP classification regime. Open-flue Class 1 chimney fires draw combustion air from the room and exhaust up the flue; balanced-flue Class 2 fires use a concentric pipe; flueless catalytic fires rely on room ventilation alone. Each carries different soot, CO, and spillage risks that a generic boiler engineer will not always catch.

We service gas fires across London under Gas Safe Register #972173. Every visit covers a strip-down of the burner tray and ceramic coal or log set, vacuum-clean of the heat exchanger and pilot assembly, flue clearance and spillage test, and a calibrated Anton Sprint Pro flue gas analyser reading at the appliance flueway. The acceptable CO/CO2 ratio is under 0.004; anything above is flagged At Risk or Immediately Dangerous depending on absolute CO ppm and the GSIUR thresholds. Fuel-effect log sets are reassembled to manufacturer spec, because misplaced logs are the single most common cause of CO spillage on a serviceable fire.

How we deliver

No surprises, no upselling. The exact path every job follows.

1. 1
   Visual and ventilation survey
   Hearth and surround logged, room volume measured, fixed ventilation checked against BS 5440-2 (typically 100 cm² per kW above 7 kW heat input on open-flue, none required on balanced-flue).
2. 2
   Chimney and flue clearance check
   Per BS 5440-1, flue checked for unobstructed termination, clearances, and draw. Smoke pellet released at the appliance hood on open-flue fires to confirm the chimney is pulling and not spilling.
3. 3
   Strip-down and clean
   Coal or log set removed and photographed for reassembly. Burner tray, injector, pilot assembly, and combustion chamber vacuumed and brushed. Glass front cleaned with appliance-safe solvent. Compressed gaskets replaced.
4. 4
   Soundness test of fire isolator
   Digital manometer on the appliance test point. Standing and working pressures verified, then a tightness test of the branch at 21 mbar to confirm no let-by on the gas tap or solenoid.
5. 5
   Reassembly to manufacturer's diagram
   Logs or coals replaced exactly as the maker specifies. Mis-placed pieces are the single biggest cause of CO spillage and yellow tipping, so this is not free-hand. Diagram and reassembly photos go on file.
6. 6
   Flue gas analyser readings
   Anton Sprint Pro probe inserted at the flueway after 10 minutes of stable burn. CO/CO2 ratio under 0.004 is acceptable, 0.004 to 0.008 needs investigation, above 0.008 is At Risk or Immediately Dangerous.
7. 7
   Safety device function test
   Flame supervision device (oxypilot or thermocouple) tested by extinguishing the pilot; gas must shut off within 60 seconds. ODS on flueless fires checked for correct cut-off.
8. 8
   Service certificate and GIUSP record
   Service sheet detailing FGA readings, pressures, ventilation, flue test, and any GIUSP classification. Emailed same-day, filed against the property's gas history, accepted by landlords, insurers, and warranty providers.