Notes: Products are given a rating of $,$$ or $$$ relative to their price positioning among other products in the same brand. These price ratings are not meant to compare a product from one brand to a product of another brand. Decibel level (Db) ratings may vary; the data provided here represents either a range of possible Db levels or the lowest rating as tested under different conditions. Efficiency ratings will depend on the matching of outdoor and indoor systems. ACDoctor is not responsible for any errors or omissions in the products database.