Life cycle costs. I used to follow the idea of diminishing returns however; when you drop from three HVAC units to one high efficiency unit and then realize that those HVAC units have to be replaced in maybe 15-20 years where the insulation does not, energy costs go up, ect. The life cycle cost over the next 200 years seems to point to more insulation. Unless you are focusing on your one year and done contract.
Posted: 01:47 pm on December 10th 2014
Cleaning Perhaps the solution is already out there. Window washing for most homes and commercial buildings has gone to the water fed pole system. Ultra purified water is a powerful solvent and what used to take hours and elbow grease now takes minutes and technology. In areas that do not have high risk for soiling you could have a window washer come out and wash your windows and pv array once a year. In areas that are prone to high soiling purchasing your own system could cost $600 in soft water areas to $1600 in hard water areas. Not cheap but your windows and car would always be clean.
Posted: 01:10 am on June 25th 2018