I am going to have the viega guy come on the week of the 12th. to look at theh job and I wanted some of your opinions. costomwer is spending $10,000 for removal of three trees to make driveway wider, $7,500 on the ashphalt driveway and 5,000 on a stone wall to keep the job looking nice that also includes paver walk way. They want to add snow melt to the driveway, I came up with 450,000 btu's but istead of doing the whole driveway and walk way we may cut it down to a single path to the street and double it at the garage. Its a 125 foot driveway and over 2,000 square feet.

Would anyone use solar water on north side of house with a flat plate heat exchanger, and use a tankless water heater as back up. and also have the water for domestic. right now they have a steam boiler and a tankless coil in the boiler. I would like to just update everything know in one shot. I also have a chance of making three rooms radiant with the under rafter method.

I am going to double check but they do hae the roof on north side which will have sun and no shade. It willl be a low flow rate so a tankless will do. What the ultimate goal to be accomplished is not having ice in the driveway after it stops snowing.

Can I put a loop under the driveay for the domestic water so instead of dumping the load becuase it is to hot to act as a cooling heat exchanger and just use a circulating pump to pump the water under ground to cool it off?