NESTOR MARTIN H11 Mode D'emploi page 57

2. THE APPLIANCE
THE DRAFT STABILIZER
The draft stabilizer works by opening to provide an additional air supply to the flue whenever the flue's negative
pressure reaches its upper limit and so checks any rise beyond this limit to maintain the correct negative pressure
within the stove.
This system of flue control is universally accepted as both effective and reliable, but as the supplementary air it
allows into the flue is drawn from the room, it is desirable to have it open as little as possible.
Where the flue is either subjected to prolonged strong winds, or the flue itself is of higher efficiency than normal,
the stabilizer may be unable to supply sufficient air to reduce the negative pressure adequately, or be needlessly
wasting room heat by having to supply dilution air constantly.
A second regulator may be fitted to the stove's flue if during commissioning the flue is found to be subjecting the
stove to a negative pressure which is too high
for efficient combustion or the longevity of the stove.
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