The Relationship Between The Chimney And The House; Why Inside Chimneys Are Preferred; Why The Chimney Should Penetrate The Highest Heated Space - Enerzone Everzone Solution 1.3 Installation And Operation Manual

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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.

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

Inferior System Design

Inside chimneys are preferred because even when

Outside chimneys are a problem because

no fire is burning, there is normally upward flow in

when no fire burns they will go into cold

the system.

backdraft if the stove is installed low in

the house.

When it is cold outside, the warm air in the house is buoyant so it tends to rise. This tendency of

warm air to rise creates a slight pressure difference in the house. Called 'stack effect', it produces a

slightly negative pressure low in the house (relative to outside) and a slightly positive pressure

zone high in the house. If there is no fire burning in a heater connected to a chimney that is shorter

than the warm space inside the house, the slight negative pressure low in the house will compete

against the desired upward flow in the chimney.

Solution 1.3 Installation and Operation Manual

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