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A tube filled with special parafine oil expands when the temperature reaches around 72º, causing a piston to push the louver blades open. When the temperature falls, a heavy spring pulls the louver blades closed. No electricity is needed!

Automatic Opener for Louver Window

$99.99Price
Excluding Sales Tax

    North Dakota Contractors License No. 49913

    Mailing Address:
    2408 33rd Ave S
    Fargo, ND 58104

    Shop / Greenhouse Display Address:
    2802 44th Ave N
    Door 106
    Fargo, ND 58102

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