What you want to be concerned with, in the hills is to have a good tall chimney, without trees, rooflines or hills obstructing the normal westerly winds.
Also, with the Harman stoves, a Barometric damper is recommended by Harman to even out and control any excess draft. This makes controling the
heat output, coal consumption and longer burn time much easier.
Seach the site, do some reading on the 'Venting, chimneys etc' forum, lots to read about chimneys and dampers.
Hope this helps,, welcome to the forum