Wasn't sure where to post this but hopefully someone clever with some knowledge of timers or thermostats could help figure this out..
I have a two storey house with wood burner in the upstairs living room. I've put in a smartvent FAN0338 heat transfer kit that kicks in when the living room gets over a threshold such as 20deg. This can bring up the temp downstairs several degrees, but it's still very damp.
I've bought the DCT1481 'summer kit' for the heattrans which includes a filter the same as their positive pressure system, and a damper that can be powered open between the woodburner heat source or external (in my case the roof space so as to make it into a HRV/DVS type system).
In winter I want to source the air from the warmest of either the roof, or living room with woodburner, and turn the system on when either is over the temp threshold.
In summer I could use effectively in reverse with the door in the stairwell shut. It would extract hot air from living room and with the southern living windows open act as a summer feature.
Now I could achieve most of this with a manual switch on an 8 hour timer which changes the damper to source from living room, if I dropped the heatrans thermostat threshold very low.
Otherwise I'd prefer if I could install a thermostat in the roof to engage the damper automatically at the right times and turn fan on.
Would this be feasible / possible?
This diagram helped clear up in my head what I'm trying to achieve - hope it makes sense
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