Yep, and I'm way ahead of ya. Huge windows covering the southwest corner; underfloor radiant heating throughout, geothermal/heat pump powered; gas fireplace in the living room for mid-season. No air conditioning, but that might change for the bedroom, since that faces south and also has huge windows and is on the 2nd (3rd for Americans) floor. We'll have bamboo floors in the dry areas, but that can be high in formaldehyde - we'll be getting the more expensive, low-formaldehyde stuff. The house is being made out of 36-cm Ytong block, which is extremely highly insulating. The windows will be low-energy rated double-pane. Triple-pane is a waste of money these days. The roof will be an extensive green roof and we'll have a 5000 liter water collector, which will be used for the garden, toilets and laundry.
If you're worried about formaldehyde output into the air from your flooring, the plants I've cited will actually consume formaldehyde. NASA did a study on this intending to use them in space stations.
I still say look into solar water heating, and see if you can pipe that into your in-floor heating system in the winter. Nice on collecting the water; depending on plant life, you can reuse output laundry water for watering plants.
There's a company that makes a pretty decent spin dryer you should look in, but be wary that it's stressful on clothes. I'm getting laundry mesh bags for when I use it on wool, to avoid stretching. It's a 3600RPM spin; I usually hang my clothes afterwards, but a tumble dryer on high heat dries them in under 10 minutes. The damn thing uses 400W of power and takes 3 minutes to extract most of the water from the clothes (and I hand wash anyway).http://www.laundry-alternative.com/catalog/Drying-3-1.html
Honestly for laundry, I think the best way to remove water would be pile the clothes over a smooth cone with an exit hole at the base,, then seal the vessel and compress it at 60-80PSI. Then crack open the drain
Repeat this 3-5 times and your clothes will have very little water in them... without high speed spin. Nobody makes such a thing; the theory is sound but I imagine there would be operational issues below a certain water content or, more likely, with clothes not packing to create a seal around the floor and into the drain.