Smarter Heating & Hot Water

Worcester Bosch FGA Tool

Enter analyser CO2 readings with the case open at maximum rate (H) and minimum rate (L). Pass/fail uses the original Hub Worcester Bosch FGA limits.

Max power, case open. Pass 8.5–10.1%

Result CO2 (H)
—

Min power, case open. Pass ≥ 7.5% and ≤ CO2 (H)

Result CO2 (L)
—

Limits

CO2 (H) PASS if 8.5% ≤ CO2 (H) ≤ 10.1%
CO2 (L) PASS if 7.5% ≤ CO2 (L) ≤ CO2 (H)

Manufacturer CO2 tables

Greenstar CDi Classic CO/CO2 settings table for natural gas and LPG
Greenstar CDi Classic CO/CO2
Greenstar i Junior CO/CO2 settings table for natural gas and LPG
Greenstar i Junior CO/CO2

Minimum and maximum rate

Important: The pass/fail check is the original Hub Worcester Bosch FGA tool (case open). The tables are manufacturer figures for those models — always check the appliance instruction. A failed reading means do not leave the boiler in service. Gas Safe registered work only.