John,
Man I hope you get some sap soon too. We are in a lull also. Gives us time to work the first bugs out of the add ons this year.
I think these spa blowers do a real nice job in both the WRU and the AOF. If I had it to do again I think I would have got 220V units and used less power and ran easier. They make some noise about 54 decibels. But a lot of the noise is in the actual evaporator from the bubbling in the WRU and thru the air nozzels too. Air out put is about 120 CFM. They run about $150, install easily, are weather proof, and could be mounted under the evaporator. Just run 2 inch PVC.
I think this was Dave 3% solutions idea. I will give him credit.
SM