Also known as the type b this vent is operating on the natural air convection.
Gas furnace venting clearances.
Direct vent gas vent clearance required depend in part on the size in btus btuh or thousands of btus per hour input rating of the heating appliance.
Install this furnace only in a location and position as specified in location and clearances page 4 of these instructions.
Gas appliance direct vent clearances distances from direct gas vent to building features sidewall vent direct vent direct exhaust systems for gas fired heaters water heaters other appliances.
Inadequate fire clearance from combustibles may not be obvious until you open a door such as our client is pointing out in this photograph.
Problems start arising if those materials are combustible and located to close to the furnace water heater vent pipe.
The 90 afue rating on these gas furnaces means that 90 cents of every energy dollar warms your home thus wasting very few energy dollars.
See direct vents side wall vents for a complete table of recommended clearance distances from a direct vent gas appliance terminal to other building.
The vertical distance to the window and the horizontal distance to the window from the nearest point of the gas vent.
Temperature of the vent pipe is transferred to the surrounding area and all the materials that are in the vent pipe vicinity.
If you apply heat to a combustible material for some period.
Refer to the furnace rating plate.
When the vent is withdrawing air from the house it expels the gas outside through the vent.
Usually these are gas fired direct vent units such as the gas furnaces described in the text below.
9 is a typical clearance between a gas fired boiler or furnace flue connector and combustibles.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
We marked on your gas vent photo the two measurements that are typically made.
Features vary by model 90 afue furnaces.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
American gas association has certified the design of condensing furnaces for a minimum of 0 clearance from combustible materials with a single wall plastic vent pipe.
Table illustrations of the required space between a direct or side wall vent for a gas fired heating appliance and building windows doors corners gas meter air intakes sidewalks balconies.
Fire clearances required range from 6 to 36 depending on the equipment.
Provide adequate combustion and ventilation air to the furnace space as specified in air for combustion and.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.
Use only with the type of gas approved for this furnace.
We describe the installation fire clearances to combustibles the use of an auxiliary blower unit and the ability of the gas furnace to deliver.
