High velocity air conditioning system questions

[nomad100]

We have a house with hot water baseboard heat and while we love it, it means we don't have a central air conditioning system.  So we are thinking that a high velocity AC system may be the way to go since we have a ranch house with an attic where the ductwork could be run.   (No need for AC in the basement since it stays very cool there all summer being mainly below grade.) 

We live in MI so it can get hot in the summer (usually have 10-20 days around 90) but humidity is is more of a problem so being able to have the system remove the humidity is key.

Has anyone had this type of system installed?  How does it perform? 

What was the cost for install?  Were you able to take advantage of any tax credits/rebates? 

Any issues that we should be aware of? 

[magdala]

It was already installed when we bought the house. It works wonderfully in our humid summers. We have a Cape. On the first floor, the duct work is in the floor and we have to teach all the small children in our lives not to throw things down the ducts. We also have to warn guests about not getting a high heel caught in the ducts. If all your duct work will be in the ceiling, you won't have that problem.

[FoxInFiji]

If the ductwork is in the attic you should go with a standard velocity system instead. High velocity is for retrofiting multistory homes that don't have enough space for the standard low velocity ductwork. High velocity will be louder, is less efficient because the fan needs to be oversized to get over the increase in static pressure, and the entire system is often flex duct which is not good as it easily can be bent.

We have a ranch in WI and we have a low pressure system that works great for us. Like you we don't need AC in our basement but we have forced air heating so it is down there as well.

[SusanBAnthony]

We considered it in our house in Minnesota (baseboard heating nly, and plenty humid) but since it was a ranch, we would have gone with a regular system with ducts in the attic, coming down to ceiling in each room. We never did it as we moved. No credits that I am aware of. For a 1200 sq ft house we were told to except 5-10k but we never got to the point of getting exact quotes.