Solar Shades: Cheap Passive Heaters
One can reduce one's heating bills and CO2 sinning by installing inexpensive solar shades. The porch windows were equipped with five pull-down shades that generated quite an amount of heat. Cost: $25 and about 2 hours of work. In the coldest month in Richmond, Virginia, solar shades and warm clothing yielded a high of $6 for gas to heat the house and water.
Being a nerd, time and temperatures were kept for a period to document benefits. Not only was the air temperature measured but small thermometers attached to the back of the shades indicated the temperature that the reached, normally 110 degrees or more. The total surface area of the shades was about 140 square feet (5x7x4). Needless to say, understanding the thermodynamics of this temperature and surface, a hot porch should not be surprising.
The following are some roughly listed results. Normally, on a sunny day, by 10am the porch/house door was opened to share the passively generated heat with the house. The porch temperature has reached 80 degrees (which this person finds uncomfortable, especially when wearing de rigor winter long-johns!)
Normally, most of this sunlight energy goes into breaking down molecules
that make up the colors and furnishing of our rooms. Interestingly, the optimal
heat transformation of radio energy is the bedrock of quantum physics: black
body radiation (e=hf).
|Using cheap roll up shades painted flat black (total cost for five shades
and paint was $25 in 2007). Here they are drying in the basement. Took about
two hours to paint using a roller and a quart of paint (in lower right hand
corner of picture). Use spray paint only if you want to spend a lot of time
|These are the two shades on the south side of porch. Three face
Shades are also present on several south- and west-facing windows on both mainfloor and basement.
|Does it work? Along with wearing long johns, sweaters and
handsocks (which allowed us
to comfortably keep the room temperature in the 50's), we had the following
gas usage during the 2013/2014 Polar Vortex winter:
We use an electric blanket with three or four other blankets for sleeping--one of the joys of life is a warm bed in a cool room. We have a tankless water heater (uses only about 20% of the gas used by a tank water heater). We don't take daily endless showers as many claim to do [If you want to be a fish, go swimming!]. For especially cold days, we do have a couple of electric heaters which we turn on if we are in the room. Otherwise, unoccupied rooms are allowed to drop into the 40's (but not waterpipe freezing 30's).
When we hear of people having $700 to $1200 monthly heating bills, we do not feel sorry for them. We resent their massive CO2-sinning lifestyles of living beyond the means of Mother Nature to support us. Climate change and extremes of droughts, floods and disasters is Mother Natures payback--see Local Lottery Winners of Global Dying.
2016 Greenhouse on the kitchen porch.
The 4x5 kitchen porch was converted into a greenhouse with a few shelves and a small temperature control heater set a 60 degrees. Installing solar shades on the porch door had some interesting results. The temperature would spike to 90 degrees which resulted in seedlings appearing in half the time. In order to avoid spindly, leggie seedlings, seedling boxes were rotated and the kitchen door kept open during the day, further heating the house.
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