26 Jun '13, 7pm

Which heating/cooling system would be most cost effective? #green

I have recently bought a split 2000 sqft (3000 sqft including basement) duplex building that had been converted into a signgle-family home some years ago. I am in the process of converting back into a split duplex. The current heating source is an oil-fired forced-air furnace which serves the whole building (one side better than the other). The building insulation is also way below code (R-5 walls, R-8 attic) Duuring this reno/remodel i am updating/improving all the insulation (R-14 walls, R-50 attic), improving airtightness and building envelope efficiency. I will be replacing the heating system as well, with two separate systems. I am trying to decide weather I should tear out all the ductwork and just go with a three headed mini-split (three levels including basement), or keep the ductwork and add an air-source ducted heatpump, or a wood pellet furnace (no cooling). Sin...

Full article: http://www.greenbuildingadvisor.com/community/forum/green...

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