Hi all, I'm new to this and would like to any feedback from others who have installed refrigerative air conditioning with ducts under a raised timber floor, and what issues they may have experience by using a common heating and cooling ducts. We are also building a new home that will have raised timber flooring so we can install ducted heating but, in our case, there is no roof space to install ducts in the ceiling in any case because our house will have 2 skillion roofs, one at 15° and the other at 7.5° pitch, both meeting in the center of the house, and running the entire length of the house. The other challenge we have is that half the house along one side will have raked ceilings in the living, dining and kitchen areas and will extend along the entry hall way, whilst the other half of the house where the bedroom bathroom laundry etc., will have flat 2.75m high ceiling and the available roof space will be minimal. The option of ducting the cooling beneath the house is attractive because we also don't need bulkheads.

is it too late to put the tin plate and foam beneath the original vent so they still look original but don't admit any draughts??

Hello vjay, the Miele instruction #3 is for the situation where there is a blind closed off bulkhead above, which is not your situation so thats ok. As for your roof space; roof spaces (like underfloor spaces and external wall cavities) are designed to ventilate themselves to remove any condensation or dampness; so to prevent any development of mould, fungi and timber rot and so the roof space you will have will vent. Convection currents that entre under your appliances will move the heat generated by your refrigerator and freezer up into your roof space, so all this is fine without putting extra vents in the front of your bulkhead. Looking at your framing, what I do suggest though, is that you make sure you put some large fine vent plates in the plasterboard opening between your fridge / freezer cabinets and the bulkhead's underside so this grill allows airflow into your roof space but seals off any access into your kitchen by insects or vermin. Hope this all helps, Regards Malcolm.

We are short on storage space for larger items seldom used suitcases Xmas trees. Has anyone setup an attic space do they recommend anyone? Was it expensive? Thanks In advance