Quote:
Originally Posted by prairiebird
We're currently in the planning stage. Although we'll be using passive solar/thermal mass for most of our heat, etc...I'd like to also have active solar (panals/hot water). These are very expensive.
|
I suspect that you're going to need some propane to keep warm enough in the winter. Get an unvented furnace like one of these (inexpensive, thermostatically controlled, and easy to install).
http://www.ebay.com/itm/New-Comfort-...-/290470482803
You'll be ready for anything with one of those. Trust me, at $133 (delivered) you'll be happy you got it. Depending on the size of your place you may need more than one. Figure about a 20,000 btu/hour heater for every 500 sq ft of living area.
For hot water I suggest that you preheat water with a solar collector as best you can inexpensively, then use propane for the final heat as needed. Any preheating you do will save just that much in propane, but you need to have reasonably warm water to bathe in. As you already acknowledged, doing all of your hot water with solar is going to cost you an arm and a leg.
For efficiency, consider a tankless model. At bare minimum, get one of these 6L models, but you may want a larger one later.
http://www.ebay.com/itm/LPG-PROPANE-...-/250829755843
I would have gone tankless at my cabin, but a neighbor had a 40 gallon propane water heater that she gave us. You can't beat free!