Lyme disease is diagnosed clinically based on symptoms, objective physical findings (such as EM, facial palsy, or arthritis), or a history of possible exposure to infected ticks, as well as serological blood tests. The EM rash is not always a bull's eye, i.e., it can be solid red.
Rule of Thumb for Changing Filters. The rule we have followed for 18 years in the filtration industry is to change filters every 6 to 12 months. Six months is almost always optimum, especially in commercial/office settings, and twelve months is as long as you want to go no matter what.
It is possible to have a cooling unit that does more cooling than it releases heat to the environment. The trick with indoor coolers is that the process by which they operate is not cyclic. These coolers are evaporative coolers and can also be used outside of a house to cool incoming air. They work by a similar principle as closed-loop cooler, but the fluid being used is water. The water needs to be resupplied as it evaporates.