Combustion in gas furnaces produces some carbon monoxide which is a toxic gas.
Clear attic furnace flue.
It is colorless and odorless and produces symptoms similar to the flu.
The roof is a t shaped gable roof.
The stem of the t has soffit vents and no vent at the top.
One of the furnaces is in the attic.
Type b vents ceiling floor wall clearances b vent clearances to combustibles clearance distances for a b vent to combustible materials in floors walls ceilings attics roofs.
Apply a thick bead of high temperature caulk the flue on one side.
Where the system is routed to the outdoors through an existing masonry chimney containing flue products from another gas appliance or where required by local codes then 3 venting of type 29 4c stainless steel must be used in place of pvc material.
If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure.
A furnace in the attic is a design that works for all homes.
Masonry flue or shared flue venting.
The top of the t has soffit vents and a ridge vent.
Remove the insulation between the joists where the flue is located to clear an area about 18 inches away from the flue on each side.
Recently moved into home in eastern ma zone 5 and have a 2 story 3k sqft home.
You might not receive the same air movement benefits if the unit is in a garage either.
2015 irc m1305 recommends that the furnace have a level working space of at least 30 inches by 30 inches in the front of the appliance.
It seems like this happens at random but mostly when it is really cold outside like 15 f or colder and it doesn t have to be snowing.
There are 3 gas furnaces and ac units.
This article series describes b vent metal chimneys used for gas fired appliances.
We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys.
When you place a furnace in the attic to take advantage of its.
Heat leak in attic caused by furnace flue pipe i ve been in my home for 5 years and have had consistent ice dam issues in the minnesota winter.
Municipalities may require a minimum of 30 clear inches in front of the furnace which can be accomplished in a small room if the door to the room opens in front of the furnace.
The issue is the flue itself gets nice and warm which means there is effectively a heater going in the attic when the furnace is active.
As the title states my furnace flue pipe in the attic is producing moisture which is leaking down into my second floor bathroom ceiling.
The furnace is located in the stem.
See also condensing boilers furnaces.
The furnace btw is natural gas and drives a hot water baseboard heat system.
