Oh it responds fine and heats or cools the zone in question. Actually over heats or cools. I think you have nailed it - this zone is too small for the system. There are new errors in the log today citing execess static pressure. So - time for my installer to re-think his duct work.
Originally Posted by dash
Thanks for all your ideas.
Load calculation - I didn't see evidence of a 'calculation' from anyone who bid. I got lots of explanations of what is wrong, but they all seemed to me to be experience based, rather than a calculation.
Originally Posted by RoBoTeq
Duct work was .. overhauled .. is the best word I can think of. For the down stairs we only did a limited cut in, so we found the ducts for my office and reworked them. Up in the attic the old system was 2 zoned; upstairs, downstairs. There was a duct board distribution box that we cut out and reworked with a sheet metal one and all the downstairs ducts were right there. My installer was dilligent on re-routing, shortening ducts and making the whole airflow equation make sense (to him). I think he may however have been unprepared for the evolution system and the minimum airflow needed for a single zone.
Thanks for your insightful questions/
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