I have used a Port-A-Cool for the past two years her in Texas where we will hit temps 100+ with 90-100% humidity. I have been very satisfied with the results using it in conjunction with the Sullivan Turbo fans. The units are built 40 miles from where I live and used a lot by auto shops, plant nurseries, lumber yards and athletic teams to help keep employees and athletes cool. I am using the HD 24" model with a 1/2 hp motor and was able to keep hair on a Shorthorn the entire summer. I highly recommend it over an A/C unit for outdoor use due to the amount of air it moves. Below is how I have mine set up:
TF TF TF TF
Port-A-Cool 8x16 Pen 8x16 Pen 8x16 Pen 8x16 Pen
This configuration allows the Port-A-Cool to blow directly across the four pens, while the Turbo Fans push the air on the calves. I have placed the Port-A-Cool on a table so that it is three feet off the ground. My barn is open on the East and West ends with a 16' peak above the pens and insulated, with this set up I can lower the temperature (inside the pens) 15 degrees year round. I run my Port-A-Cool from end of April through November here in Texas. If you have any further questions PM me and I will try to help. Sawboss