Drolet Classic Specifications download pdf (Page 35)

Classic With Blower Installation and Operation Manual

8.4 The Relationship Between the Chimney and the House

Because the venting system is the engine that drives the wood heating system, it must

have the right characteristics. The signs of bad system design are cold backdrafting when

there is no fire in the stove, slow kindling of new fires, and smoke roll-out when the door is

opened for loading. There are two guidelines to follow. First, the chimney should be

installed up through the heated space of the house, not out and up an outside wall.

Second, the chimney should penetrate the top of the building at or near the highest heated

space.

8.4.1 Why inside chimneys are preferred

Venting systems that rise straight up from the stove flue collar provide the best

performance. Chimneys that rise inside the warm space of the house tend to provide a

small amount of draft even when there is no fire burning. This means that when you light a

fire, the initial smoke goes up the chimney and strong draft builds quickly as the chimney

flue warms up. Although they are common in North America, chimneys that exit a house

wall and run up outside can cause problems.

Good System Design

Inside chimneys are preferred because even

when no fire is burning, there is normally

upward flow in the system.

Inferior System Design

Outside chimneys are a problem

because when no fire burns they will go

into cold backdraft if the stove is

installed low in the house.

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Drolet Classic Specifications Page 35