Direct Vent Boiler And Chimney

My house had a high efficiency boiler vented into a conventional masonry chimney.

Direct vent boiler and chimney.

Chapter 9 specific appliances fireplaces and. If you have a direct vent gas boiler you use the appliance that is specially designed to extract a lot more heat from the same fuel quantity. For new construction i typically specify running the pipes vertically with a roof termination. And the current boiler exhausts across the house 12 feet to the chimney through an asbestos pipe that has seen better days.

This will eventually degrade the chimney and create possible co leaks. Normally it has a metal flue connected to a chimney. The unit itself relies on a natural atmospheric combustion. Direct exhaust venting draws combustion air from the utility room or boiler room around the heating appliance and vents appliance exhaust out through a building sidewall or through the roof using an approved or listed b vent metal chimney or similar materials.

Direct vent boiler concern in brief. The first benefit of a direct venting system is that it eliminates the need for a chimney. Appliance connections to a chimney or vent equipped with a power exhauster shall be made on the inlet side of the exhauster. I need a new gas boiler and i need 2 000 lowest estimate in chimney relining pointing etc.

804 direct vent integral vent and mechanical draft systems 805 factory built chimneys. This can result in substantial savings 500 1500 depending on size and cost in new home construction. There is also the opportunity to retrofit chimneyless i e electrically heated homes. Other chimneys in the house that vent only fireplaces don t seem to have the problem.

The direct vent gases are cool and will condense inside the chimney fast leaving a pool of highly corrosive water at the bottom of the chimney. I have had tremendous efflorescence problems with the chimney ever since.