Oil-to-Gas Chimney Conversion in Suffolk County — Liner Required by Code

Oil-to-Gas Conversion: Why Your Chimney Liner Must Be Replaced

Suffolk County has converted tens of thousands of homes from oil to gas over the past two decades. Almost every one required a new stainless steel chimney liner. Your oil burner vented through an oversized clay tile flue — typically 8×8 or 8×12 inches — because oil combustion produces high-volume exhaust. A modern gas boiler or furnace produces cooler, lower-volume exhaust. That cooler exhaust traveling through an oversized clay flue slows down, cools further, and condenses on the tile walls. The condensation is acidic. It attacks clay tile and mortar joints, causing cracking, liner failure, and a carbon monoxide risk. Suffolk County code and appliance manufacturer requirements both mandate a properly sized stainless steel liner before the new gas appliance can be put into service. DME Maintenance handles the liner — factory authorized, lifetime warranty, full documentation for your permit file.

Suffolk County code requires a properly sized stainless steel liner for all gas appliances — your oil flue won't pass inspection

Flexible stainless steel liner inserted from the top — no wall demolition, one-day installation

Sized precisely to your new appliance's BTU output and vent connector diameter

Insulation wrap installed where required by code or manufacturer

Full written documentation — liner specs, install date, manufacturer warranty — for your permit file

DME Maintenance coordinates with your plumber and National Grid / PSE&G — we're familiar with local inspection requirements

Factory-authorized installer — lifetime warranty on every liner