Hello All I had a series 7 installed in my house when it was built in 2013. We are having an issue getting enough heat to the 2nd floor runs furthest from the unit. I have had a few people come out and give me their impressions and ideas to fix the issue. Ultimately I feel that in the end zoning would be my best option, but when it was installed I couldn't afford the additional expense for zoning at that time. My installer said that it could be done later for a reasonable price. The original installer has since been bought out so I am getting multiple bids with multiple choices. One installer suggested just using individual slip in dampers for the 30 runs off of the trunk. Another said that a series 7 can not have more than 3 dampers daisy chained with the intellizone2. Because of that I would have to rerun all of the duct work for 3 seperate trunks. I am just looking for guidance.