Smarter Heating & Hot Water

Vaillant FGA Tool

Enter analyser readings at maximum rate (H). CO2 pass/fail follows the ecoTEC table for the gas and whether the front is on. Ecofit Pure O2 uses the original Hub open-casing check.

Gas type
Front case

Max power. Pass 8.2–10.2%

Result CO2 (H)
—

Max power, case open. Pass 2.7–6.3%

Result O2 (H)
—

Limits

Manufacturer CO2 table

Vaillant ecoTEC CO2 settings table for natural gas and propane, case on and case off
ecoTEC natural gas and propane CO2 (case on / case off)

Related

Important: CO2 pass/fail uses the ecoTEC table for the gas and case you select. Ecofit Pure O2 is the original Hub open-casing check. Always confirm the appliance instruction for that model. A failed reading means do not leave the boiler in service. Gas Safe registered work only.