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Old 08-25-18, 12:28 PM   #4
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6" is more or less "old school" overhere in the Netherlands. 4" (or even less!!) is favourable, especially when you are using a heatpump. Or if you are planning to use one in the future.
More tubelength (so closer tubing), means lower watertemperature for the same amount of heat.
And lower watertemperature means a more efficient heatpump.
The difference in e-consumption is about 2,5% per C.
So if you ar planning a hydronic heating right now, please do it right the first time.....
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