This is the Mother of All pipe coil solar pool heaters. It uses 4000 ft of black poly irrigation pipe.
A very nicely done project with lots of good detailed pictures, and some performance data.
Details here...
More Information on Tom's Large Pool Heating Collectors
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkyepNZo9Hgy3l-sxHrrOfG_MGN9FoBbcSnbMP2q9ocqkOlyhanpuhsFfDCrqBZWqnWKUSw77C8MfeXHYjp5f3tgRVnXpxkj6vWSRGbfLtXzLqvMfHGn7APnfKHyN5B7v3cakgxjoqP96C/s200/TomPoolHeater.jpg)
Tom's collectors uses PEX tubing with aluminum fins and (like most pool heating collectors) are unglazed.
Construction details here on BuildItSolar...
More information on Tom's new website....
Update on Woodsy's $1K Solar Water Heating System
Woodsy's $1K Solar Water Heating System is a year old, and he provides and update on the system that includes estimated energy and dollar saving. The first year of operation has been trouble free.
The performance report for 1 year of operation...
Fisher Coach GTB-40 Hybrid Bus
The GTB40 buses from Fisher Coach are about twice as fuel efficient as conventional buses. There is an all electric version powered by batteries, and a range extended version that uses a CNG powered generator to charge batteries. The buses are about 1/3 rd lighter than conventional buses due to a stainless steel unibody design.
Details...
Gary