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Thread: Adding Glycol to snow melt system

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    DIY Junior Member thompsonblake's Avatar
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    Jan 2012
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    Question Adding Glycol to snow melt system

    Currently working on installing a closed loop snowmelt system for a driveway roughly 38x18. Using 3 loops (1 zone) at around 300 feet runs (3/4 HePex, 9 inch centres) Im adding this system to an existing boiler that does have enough BTUs to heat the system. Laying the pipe and building the headers is fairly straight forward and I have done countless times. However my journeyman has always handled the more detailed boiler work such as, pump size, heat exchanger, expansion tank size. More importantly i have calculated that i need a 40% glycol mixture but am not sure the best method for adding and maintaining the glycol in the system.

    Any help would be appreciated but i guess I'm looking for the best method for adding glycol and maintaining glycol levels, and possibly a simple diagram boiler system.
    Last edited by thompsonblake; 01-20-2012 at 07:41 AM. Reason: typo

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