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Posted by HeatPro on September 27, 2004 at 12:43:08:
In Reply to: Monoflow 2 pipe system currently 1 zone posted by Randy on September 27, 2004 at 11:19:32:
When buying a new boiler, you tell the salesperson how many btuh you require when the weather is at the average coldest week of the year.
After you are sure your boiler is large enough to handle the house, you can divide the house into zones without a problem. Your monoflow loop is best served by the circulator that is serving it now and the new loop by its own; so you will have two circulators and circulator relays controlled by their own zone thermostats.