What's Included
Gas fireplace vents in Markham, in detail
A vent listed with the appliance
A direct vent pipe is not a generic part. DuraVent's DirectVent Pro instructions explain that the venting, in combination with the gas appliance, has been tested and listed as a system by a major testing agency, and they tell installers to check the appliance's rating plate and manual to confirm the vent is approved for that brand.
We make the same check on your Markham fireplace. The vent brand and model on the job must be one the appliance maker approves, and if the existing vent is not, we explain what that means before any repair is quoted.
Why vent parts are never mixed
DuraVent's direct vent instructions list actions that void its warranty and may create serious fire, health or safety hazards, including installing a damaged component, modifying the system without authorization and installing pipe or parts not approved by DuraVent or the appliance maker. Its Type B instructions say plainly not to mix and match with other makers' vents or improvised solutions.
A section borrowed from another brand may not lock or seal as designed, and the listing no longer describes what is installed. Our team replaces vent parts on your Markham fireplace only with approved components from the same system.
What a Type B vent is for
Type B gas vent is made for listed Category I gas appliances with draft hoods. DuraVent's Type B instructions list gas fireplaces among the appliances that use it and say it must not vent Category II, III or IV appliances, oil-fired or wood-burning appliances. Florida's fuel gas code requires vents to be listed and labeled, with Type B vents listed to UL 441.
If your Markham fireplace is a natural vent model, our team confirms from its manual that Type B is the specified vent and that the pipe installed is the listed product it names.
Downdrafts in a B-vent
DuraVent's troubleshooting section says downdrafts are generally caused by a termination too close to an adjacent wall, parapet or other structure. It also names inadequate combustion air, and notes that clothes dryers or other exhausting appliances in the same room can cause downdraft problems.
For a natural vent fireplace in Markham, our team looks at the cap height and the nearby walls and asks what else exhausts air from the room. The fix may be at the roof or inside the house, and we explain which before pricing it.
