13 Oct '16, 1pm

Banish ‘Payback’ https://t.co/8dLpA7R7ao

Yes Bruce, most stocks, interest bearing bank accounts and almost all investments are judged on their rate of return and risk which payback is directly related to. There is significant costs to building a net zero home and their are risks to constructing super insulated walls and roof assemblies. To ignore the costs, rate of return on an investment, and risks would be folly and not very real world. In your example a 4.3-Kw PV system is significantly undersized an average American home in zone 5. Average sized homes are over 2,000 square feet in the US. While this maybe excessive it is a fact. Most people (or builders unfortunately) don't have the knowledge and skills to achieve 1 ACH50. So suggesting to ignore the increase in costs to air seal and installing a whole home ventilation system is not very real world. If you are financing these energy efficient upgrades you sho...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/guest-blog...

Tweets