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Gas fireplace venting for direct vent and B-vent units in New Malibu

Free inspection, clear answers and a written estimate for your gas fireplace vent in New Malibu, plus 10% off if you book within 72 hours.

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The written venting scope for your New Malibu home

Covered by the free vent inspection in New Malibu, with no charge and no obligation afterward.

  1. Firestops and wall passes at each penetration
  2. Rise or level run of horizontal pipe against the manual
  3. Listed replacement parts named for your model
  4. Parts of the run we could not reach, stated in writing

Vent know-how from our New Malibu crew

What our venting specialists explain to homeowners in New Malibu before any pipe is replaced.

A sealed firebox that takes its air from outdoors

A direct-vent gas fireplace pulls every bit of its combustion air in from outdoors through the vent pipe, as one maker's manual puts it, and sends the exhaust back out the same route. On most units the pipe is two pipes in one, with exhaust in the smaller inner pipe and fresh air moving in the space around it.

Because the room's air plays no part in the fire, the glass front is part of the seal too. Our pros treat the cap, the pipe and the glass as one system and check all three before blaming any single part.

Reading the rating plate before touching the vent

Every gas fireplace carries a rating plate with its model, its gas type and its input. That plate is the key to the right manual, and the manual is the key to the vent. Without it, nobody can say which pipe, cap or restrictor belongs on the unit.

On the first visit our crew finds the plate and copies the model, gas type and input into your service record. If the plate is missing or unreadable, we say so in writing and explain what that means for any repair we quote.

Horizontal runs with the wrong pitch

Horizontal vent pipe is not simply run flat. One direct-vent manual's troubleshooting table lists an improperly pitched horizontal run as a reason flames die out, and it tells the installer to check for an upward rise of 1/4 inch per foot and never run the pipe level or downhill.

The same manual gives different rules for different pipe types and layouts, so our crew checks which rule applies to your run before measuring. The finding goes in your estimate with the section of pipe it concerns.

A new roof around a vertical vent

Reroofing disturbs everything at a vertical gas vent, from the flashing to the storm collar to the cap. Section 503.6.7 of the Florida fuel gas code calls for gas vents to pass through a roof flashing, roof jack or roof thimble and end with a listed cap or listed roof assembly.

A generic cap from the roofing supply is not always the listed one. Our crew checks the cap, the collar and the height above the new roof surface and replaces what does not belong.

Looking inside a framed chase

A framed chase hides the vent between the fireplace and the roof. Some have an access panel, and many do not. One B-vent fireplace manual asks for the chase to be insulated like an outside wall while keeping clearances to the pipe.

Our crew checks whatever the chase lets us reach and states what it could not see. If opening the chase is the only way to settle a question about the vent, the estimate shows the access and the patch as their own lines.

Asked in New Malibu about gas fireplace venting

Straight answers on vents from our specialists in New Malibu, with no pressure to book.

Can a gas insert vent through an old masonry chimney?

Many can, with a pair of flexible liners down the flue, one bringing air in and one taking exhaust out, where the manual allows it. One maker permits that only in a solid-fuel fireplace and chimney that serves no other solid-fuel appliance. We check the chimney and the manual first.

Can I use the fireplace while I wait for a vent repair?

We recommend keeping it off while a vent fault is unresolved. A sealed fireplace depends on its vent to bring air in and take exhaust out, so running it with a known fault is not worth the risk.

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