Heatiator C40 owner manual Overhanging tree?

Unsealed can lights?

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.)?

Overhead fan

operating?

Air register from furnace near fireplace?

Doors opening
and closing?
Window closed	Combustion
for start-up?
	air control

Structural

changes in chimney area?

Creosote buildup in flue?

Outside air closed?

Figure 3.1 Factory-built Fireplaces: Troubleshooting

Page 18 Heatilator • Constitution EPA Fireplace • 480-1091H 4/12