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Uponor manifold balancing
Hoping for a little advice on balancing a manifold. We bought a new house in Minnesota and it has infloor radiant heat throughout, three zones.
The master bedroom is quite a bit colder than the rest of the second floor. So I opened up the access panel and this is what I found. The loop all the way on the right just goes from the supply directly to the return manifold and its flow is around 1.3 gpm while the rest of the loops are closer to 0.6.
The previous homeowners do not know who installed the system and the builder is no longer in business. Any advice is appreciated. Thanks!