10 Troubleshooting
This fireplace will operate correctly only if adequate ventila- tion is provided to allow proper draft to the fireplace system. Hearth & Home Technologies assumes no responsibility for the improper performance of the fireplace system caused by inadequate draft due to environmental conditions, down drafts, tight sealing construction of the structure, or mechan- ical exhausting devices which will create a negative air pres- sure within the structure where the fireplace is located.
A. Understanding Vent Problems
If smoke spillage occurs from a fireplace opening when the door is open and the proper chimney height, flue size, and configuration requirements for the installation have been met, there is either a leakage in the flue, a blockage in the
flue, or some condition is in effect to draw smoke from the fireplace into the house. Understanding and differentiating the conditions which can cause each of these kinds of spill- age problems is essential to their solution.
•Flue Leakage
Check for improperly connected flue joints or a damaged flue joint in the chimney system. Such leakage would reduce draft (air would be drawn in through the leaks rather than through the fireplace). The result might be difficult
•Flue Blockage
The damper should be open.
Overhanging tree?
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Bird's nest or leaves in termination cap?
Another appliance in 
home also exhausting
air (furnace, fan, dryer, etc.)?
Structural
changes in 
chimney area?
Overhead fan 
operating? 
Doors opening and closing? Window closed for
Air register from furnace near fireplace? 
Creosote buildup 
in flue?
Damper closed?
Outside air closed?
Figure 10.1 Factory-built Fireplaces: Troubleshooting
32 | Heat & Glo • |
