Gas appliances are divided into four venting categories based on vent operating pressure and whether they are condensing or non-condensing. Category I is negative pressure, non-condensing. Category II ...
Q Can you provide advice on how best to deal with cracked chimney liners? My house was built about 15 years ago and has a concrete and clay flue chimney. I burn briquettes in a multifuel stove, but I ...
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