When several appliances are vented into a
common chimney connector (Figure 10), each
should have its own draft control located in
the uptake between the appliance and the main
breech (location A).
If the uptake is too short to allow the instal-lation,
locate the control in the main breech
(location B).
16 National Oilheat Research Alliance
If neither location is possible, install a single
large control between the chimney and the
nearest appliance (location C).
How Draft Controls Work
Figure 11, bottom of page, shows how draft
controls work in overcoming excessive drafts
and improve the combustion of fuel.
Figure 10
Figure 11
