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the most frequently asked question?
The most frequently asked question Circ's or ZV's?
With massachusetts rebates, variable speed pumps equal the cost of ZV's now.
Senario #1) A FHW boiler P/S loop, single delta T circ with a multiple ZV system will have each circuit balanced.
Scenario #2) Same as above, except with multiple delta T circ's.
Which method is more effective and efficient on a multi zoned system?