Solar hot air collector, again

Im getting excited about this solar hot air collector idea, again. I found this book at our office: Sun, Wind and Light, Architectural Design Strategies. Its got over a hundred strategies for designing or retrofitting buildings with all kinds of passive green strategies that use the sun, wind, and light of your specific area. I like the mantra, "Passive buildings, active occupants," which encourages people to use buildings to temper their spaces, and not be so dependent upon "active" mechanical components, like fossil-fuel fired heating and cooling systems, or even super expensive photovoltaic solar panels. The simplest way to think about this would be to open the windows on a nice day rather than use the air conditioner. Or, turn off the electric lights and open the shades to allow daylight in, especially on the south face in the winter. Anyway, Im thinking about installing a rooftop unit like this one on our house instead of smaller window units in the previous post:

The basic premise of the panel is there is a glass / plexiglass face, with a thin air space, and a corrugated steel backing, painted black. In the winter, cold air enters the lower intake, is super heated in the sealed air chamber by the sun, and exits at the top, pulled by an inexpensive fan, through ductwork (or not) into the house. Because heat rises, you need to get that free hot air down to the first floor, so I would hook ours into our existing ductwork system, then it would rise throughout the house naturally. You can even hook these up to thermostats, so they turn on and off. All told, I'm told you can build them for between $100 and $500......free heat for about 25 years after that.

fossil fuel fast

In my attempts to get off the fossil fuel addiction, Im working on 2 strategies:

1. less or no automobile use

2. heat the house with "alternative means"

The first one is coming out of my Lenten discipline of sleeping by 10, awake by 6. Im ramping it up to include a walk to the train (at Temple U) in the morning, which gives me even more time to get present and listen before the workday begins. Plus I get to see interact with parts of my neighborhood that Im apt to drive through than walk. Even today I had a brief but sweet interaction with a guy sticking his head out the door remarking on the cold weather. We agreed to disagree, kindly. Not driving my truck around keeps me from being addicted to going wherever I want whenever I want as fast as I want.....depending on my two feet, and SEPTA keeps me disciplined to a schedule, and keeps me in touch with the heartbeat of the city. plus its so much cheaper.

The second phase of the fossil fuel phase out plan is two fold:

2a. Install an EPA certified wood-burning stove. My pal John just put in a stove and he cooks his place out. Its going to be some bones to get it rolling, but nothing compared to my gas bills every winter, and we keep that thermo at 60 degrees! PGW is going to have a lot to answer for one day, to a lot of people. The great thing about wood is that with the right stove, most of the environmentally harmful exhaust gases can be reburned to add more heat, and keep the smoke out of the atmosphere. Plus wood is a renewable resource, and ill be getting all of my wood from salvaged sources (pallets, construction scraps, wood flooring contractors, fairmount park commission, etc) Hmmmmm, Ill need my truck for this...compromise.

2b. This is the new cool part im pretty excited about. Build and install a solar "heat grabber", which is nothing more than an airtight box, with a plexiglass top, black painted aluminum backing, some insulation, caulk, some scrap 2x4s, and a cheap fan and thermostat. check out these links. you can build one for about $100, and it provides free solar hot air throughout the winter, even on some cloudy days.

love the narrator's voice, so calming.....

http://www.youtube.com/watch?v=N8SEwJkEwoc

and a scrap material panel from the UK:

http://www.youtube.com/watch?v=173owKST-w4&feature=related