| Zero Energy Home | |
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| Super efficient home in Bangor, Michigan. Integrates radiant in floor heating, mansonry stove, Solar photovoltaics, wind generator, solar hot water, passive solar. | ||
| Thermosiphon batch solar water heater |  |
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| Solar water heating with vacuum tube heat pipe batch water heater on roof of Oak Grove Sanctuary in Fennville, Michigan. | ||
| U S Marine Corps Combat training pool |  |
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| A very large flat plate collector array on roof of training pool for all year pool heating. Quantico, Virginia. | ||
| Solar hot air system |  |
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| 3 panel solar hot air collectors on roof of workshop, Pullman, Michigan. | ||
| Cityside Middle School |  |
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| 1 kW grid tied solar PV array with UniSolar modules installed in Zeeland, Michigan. | ||
| Pearl Alternative High School |  |
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| First photovoltaic grid tied PV system in west Michigan at the Pearl alternative High School. | ||
| Solar Cooking |  |
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| Solar cooking class at Alternative High School. Cooker on left is cast concrete village design from article published in Home Power magazine. | ||
| Tilt tower wind generator |  |
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| A tilt up tower at 82 ft at the Kaufman house using Whisper H80 wind generator, Bangor, Michigan. | ||
| "the answer, my friend, is blowing in the wind..." |  |
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| 10 kW Bergey about to fly in Iowa | ||
BTF Ltd is a Michigan residential & mechanical licensed and insured contractor. We would be pleased to design a solar system for your situation. We have been installing and suppling design and equipment since our incorporation in 1988. Contact email:
12/28/03