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Efficiency between commercial and DIY collectors. And best for the money?

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  • Efficiency between commercial and DIY collectors. And best for the money?

    Hi Guys, im frmo Argentina im finishing my house and i want to combine solar heater with gas ones.

    Im looking about to build an Drainback System to use for flooring heater and hot water.

    I was looking for prices and are a little expensive.

    Im looking some diy alternatives (if efficiency are similar)

    50 x Vacuum tube collectors (without heat pipe, just the ones that pass the water inside) cost me 1000USD
    25 x Vacuum tube collectors (with heat pipe) cost me 1000USD

    i was thinking abt purchase 150 Vacuum tube collectors (without heat pipe) for the price.

    what recommend me to use as collector? a comercial one or maybe some diy one?

    was thinking to use some similitar to the draw that i made

    Water


    Radian Floor



    Thanks in advance
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