Gas fireplace venting by local pros in Spring Isle

Air space around the vent pipe

Vent pipe needs open air around it. In one maker's chart, horizontal pipe keeps 3 inches of space above it and 1 inch below and to each side until it reaches the outside wall, and the pipe keeps a 1 inch gap on every side where it passes through that wall and wherever it runs vertically.

The same maker warns that stuffing insulation or anything else into those gaps can drive temperatures up and create a fire hazard. Our crew checks every section it can reach for framing, wiring or insulation crowding the pipe and lists any correction in the estimate.

• 3 inches above horizontal runs in that manual
• 1 inch at the sides and bottom
• 1 inch all around at walls and on vertical runs

Firestops on a B-vent run

B-vent passes through ceilings and floors with a firestop at each framed level. One B-vent fireplace manual sends the installer to the vent maker's instructions for firestop sizes and notes that only one firestop is needed per frame.

The same manual asks installers to avoid cutting load-bearing framing to make room for the vent. Our crew checks each firestop it can reach and flags any framing that was cut, since a structural fix is separate work and is quoted on its own line.

Fresh air inlets near the vent cap

Exhaust should not be drawn back into the house. One maker's chart asks for a direct-vent cap to sit 3 feet above any mechanical air supply inlet within 10 feet horizontally, and it sets a smaller distance by input for air inlets without a fan.

The same manual adds that gravity air intakes within 3 feet of a cap must sit at least 1 foot below it. Our specialists look for fresh air intakes, ventilation openings and other appliances' air inlets near your cap and measure each one.

Blue flames that float off the burner

Flames that turn blue, lift off the burner and wander are sometimes called ghosting. One direct-vent manual ties it to insufficient oxygen reaching the fire and lists four checks for it.

Our crew works through those checks in Spring Isle before anything is replaced, starting with the easiest to reach.

• Cap installed correctly and free of debris
• Vent joints tight with no leaks
• No debris blocking the air intake at the back of the firebox
• Glass secured and latched

After a flood or a burst pipe

Gas fireplace manuals are blunt about water. One says a fireplace with any part that has been under water or exposed to it stays off until a qualified technician has inspected it and replaced every control and gas control that was submerged.

Our technicians follow that rule even when the unit seems to light. They check the controls, the burner and the vent, and they list the replacement parts and the vent findings separately so you can see both.