gas boiler with high c.o. levels fixed

gas valve was non adjustable so i got a replacement gas valve and dialed this boiler in to work properly ..combustion test

• #howto_style
• #carbon_monoxide_chemical_compound
• #carbon_monoxide_poisoning_disease_or_medical_condition
• #gas_phase_of_matter
• #health_industry
• #quality
• #level
• #definition