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cdig · 09-14-09, 10:20 AM

Stupid question, but has anyone seen or heard of anyone building their own evacuated tubes for a solar collector? Could it really be that hard?

09-14-09, 10:20 AM	#1
cdig Helper EcoRenovator Join Date: Sep 2009 Posts: 61 Thanks: 0 Thanked 1 Time in 1 Post	DIY evacuated tubes? Stupid question, but has anyone seen or heard of anyone building their own evacuated tubes for a solar collector? Could it really be that hard?