I am in the midst of getting footers poured for my new house - it will sit on a few acres in a wooded environment. The lot is a bit steep on one side - where I will have to build up 10 feet before I even hit start the basement. Then another 10 feet for the first floor. I am thinking the ground that is 20 feet below the first floor might be a good place for the units. I think I will also have a standby generator there and even the outside part of a tankless water heater (still deciding on this - as the price is high). I am wondering if I can build a nice vented enclosure for the these units ( ie block work would be cheap now ... ) - that if properly done, could be cooler in the summer and warmer in the winter - to give better Heat Pump efficiencies ?
Is this even possible and feasible ?
Thanks - Dan