This approach could be very efficient in winter conditions if your ground temperature is not too close to freezing. As long as there is heat to be gained, this tank could be an awesome buffer against freezing your ground loop. However, using a storage tank in this manner requires a different set of operating parameters than a traditional heat store. Needless to say, it would do a better job at space heating than for dhw.
Last edited by jeff5may; 06-26-14 at 06:15 PM..
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