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HEAT PUMPS WITH A CONDENSING BOILER
Replacement heating and cooling system at a four story office building.
The present system is a steam boiler with steam to water HX. The water side is pumped into multiple (around 20) 2 to 3 ton heat pumps located in each office area ceiling.
There's a cooling tower on the roof for the summer A/C functioning of the inside heat pumps.
I know condensing boilers love cool return water temps. I wonder how they'll like a 65 degree return water temp and a 75 degree supply water temp?
Think that sucker will condense?
My A/C wizard has the summer side, cooling tower and heat pump ends all covered. The boiler room is mine. Other than simple bypassing arrangement to get into a more comfortable water temperature range for the condensing boilers contemplated, how low do you suppose a condensing boiler can go without going "too low" in system water temps?
I should and will contact all the manufacturers but thought many of you might know off the top of your head.
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