Hi Jesse--
I see from the bio's page that you're in MN. More on the ' super-insulated
shell ' end of the spectrum than ' Passive solar' , but then the natural
light that comes with passive design could be very important to avoiding the
winter blahs-------- at least this approach gets the horse before the cart .
ie; minimize the need for energy.
As for how best to get the needed energy into the house, even in MN, you can
borrow some from Mother Nature, with a water to water heat pump. Water
source or ground loop, the cost effectiveness is probably there. As for
being near net zero, I'd sure have a wood stove or boiler available. Depends
on the details of the home--city/rural, orientation/ solar availability,
lifestyle/budget, grid reliability/ability to do without it, etc.
A heat pump boiler will be 3-5 times more efficient than an electric boiler.
Just my $.02 --------
Take Care
Ken
----- Original Message -----
From: "Jesse Dahl" <dahlso...@gmail.com>
To: "Wrenches" <RE-wrenches@lists.re-wrenches.org>
Sent: Saturday, August 27, 2011 9:05 AM
Subject: [RE-wrenches] Electric boiler usage?
Wrenches,
I am working with a family that wants to install a grid tied system that
will offset, as close as possible, 100% of it's electrical usage. We have
calculated for almost all the loads except the electric boiler.
Problem, they don't know which boiler they will be using. The home will be
1800sq ft, it will have the in floor heat between the floor joists and the
joists will then be insulated with foil-faced insulation.
Has anyone calculated a boiler like this out for annual electrical usage?
Thanks as always,
Jesse
Sent from my iPad!!!
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