Would highly recommend getting the higher BTU if you have more than 400 square feet. Living in Seattle, where it doesn't get terribly hot, this mostly covers just a large living room... Otherwise, it's been great. Louder than expected (even just with the fan setting). Something to keep in mind is that Frigidaire customer service is EXTREMELY difficult to get a hold of if you need help troubleshooting issues. The "Clean filter" light has been on consistently basically since purchasing the unit, despite a perfectly clean filter, and no amount of troubleshooting has helped. Not Wayfair's issue, something to consider when buying any Frigidaire-branded product, though.