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Single vs double glazed flat panel collectors
I'm hoping someone can provide me with some information regarding the benefits of single vs double glazed collectors. At what point (outdoor temp) does the insulating benefit of double glazing typically overcome the reduced light transmission? I have some double glazed collectors that will be used for year-round DHW heating, I'm wondering if it would be beneficial to convert them to single glass. They are low iron glass with black chrome absorbers. The collectors are very old and there is limited information available from the manufacturer.
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