Thank you for your question. The problem you have described is incredibly unusual if not unique and very difficult to give a definitive answer without more information.

Therefore can you please call Tony Ingram on 01788 554410 or email your contact number to sales@morsoe.com and mark it for the attention of Tony. We will try to answer your question.

Building Regulation Approved Document J (ADJ) currently does not mention the use of direct outside air supplies however it is widely recognised by manufacturers, installers and building control officers as an alternative installation method that has been successfully used in the UK and across Europe for many year. Unfortunately the Ø6 does not have this facility but a number of our other products do.

ADJ states: For solid fuel appliances avoid installing extract ventilation in the same room. However it goes on to say: If mechanical extraction is unavoidable then seek specialist advise to ensure safe operation of the appliance. Therefore the Ø6 can be installed in the same room as an extractor if it can be shown the flue draft is unaffected. The flue pull can be tested with a suitable draft gauge or appropriate smoke test. If this method of complying with ADJ is adopted it is the responsibility of installer at the time of the installation to ensure the safe operation of the stove and chimney.

If the top plate of the stove projects into the room from the fireplace opening so that any part of it is directly beneath the mantle there must be a minimum clearance of 500mm.
In the UK there is currently no regulation specifying the minimum clearance to a combustible mantle If the stove is fully inset, however we would recommend the mantle is fitted at least 300mm above the fireplace opening.

The Morsø Owl Convector has 3 air intakes, these are:
 
Primary air.
This is controlled by the level under the left hand side of the ash lip
(as you look at the stove) pushing the lever up closes the air intake
and rotating the control anti clockwise will open the air intake. The
primary control introduces air into the stove below the grate and should
be used when burning solid fuel (manufactured smokeless fuel).Secondary air.
The secondary air intake is controlled by the lever under the right
hand side of the ash lip and is operated in the same manor as the
primary control. The secondary air is drawn into the combustion chamber
through cast iron channels and introduced above the fuel via the air
wash manifold, this curtain of pre-heated hot air washes down the glass
keeping it clear. The introduction of hot air in the firebox will also
produce secondary combustion of the fuel gases giving a cleaner and more
efficient burn. Secondary air should be used when burning wood but can
also be used at lower levels to maintain a clean glass when burning
solid fuels. When wood burning allow a 2-3 cm bed of ashes to build up
beneath the wood and any logs with a diameter larger than 100mm
(4inches) will require splitting, all logs must be well seasoned. Tertiary air.
This is simply a third air intake; although there is a control lever
for this at the rear left hand side of the stove it is pre set in the
lower position and should not be adjustment. Tertiary air guarantees
sufficient air into the stove to give a clean burn when using wood.