JC, save yourself some frustration and get a refrigerated dryer. My conditions here are worse than most places, but after trying many different filters, replumbing, changing desiccant constantly, I finally gave up and replaced the dryer that had quit. Lots of wasted time and money trying to get consistent results. The dryers are the only way to go, IMO. They are available on craigslist and marketplace used quite often and normally last for many years. The IR I had lasted for 17 years running 10-12 hours a day. The Harbor Freight dryers would be fine for your application, especially if you plumbed it just for paint application.