Edgestar 28 question

What is the temp range of these things. I live in New England so most of the year I can probably get away with not turning it on, but we do get some stretches of 90*+ weather during mid july to mid august.

Also does any body have a good thread of how to prep these things and get them ready for use. With so many out there it probably would be a good idea to have one sticky'ed for us new comers