The Comfort Zone CZ310R Reversible Twin Window Fan has a bug screen, one of the many firsts we;ve seen, that keeps bugs out of the fan and the room. But despite all these innovations the people at Comfort Zone don\u2019t seem too keen on giving measurements. There\u2019s no dB levels measured, for example. Check out our best window fan list for more great options!\r\n\r\nWhy We Like It - Comfort Zone CZ310R\r\nThe Comfort Zone CZ310R contains many \u2018firsts.\u2019 One, for example, is that it has a removable cover that keeps hot air out of your room even when the fan isn\u2019t on. It has three speed settings, which is rare for some reason, and is expandable from 23.5\u201d to 37\u201d, which means it will fit most windows.\r\n\r\nPerformance\/Power\r\nThe Comfort Zone CZ310R is a three speed fan with electronically reversible fan motors. Believe it or not, a three speed fan is actually pretty rare in the window fan world so we\u2019re happy it\u2019s included here. Check out the Holmes Window Fan if two speed settings is enough for you. The CZ310R works in three modes: cool brings air in, and exhaust removes stale air from the room. What\u2019s better, you can have one fan do one job and another fan do the other job!\r\nDurability\/Build\r\nThe Comfort Zone CZ310R is universal, and fits most windows. It comes with accordion expanders, and is expandable from 23.5\u201d to 37\u201d. Despite this, it would have been nice to have exact measurements of the windows needed so that you\u2019re not playing a guessing game. But on the plus side, the fan comes with removable feet so you can turn it into a table fan!\r\nNoise\/Sound Level\r\nThe Comfort Zone CZ310R doesn\u2019t have any sort of dB level listed nor does it have assurances that it\u2019s quiet on the product page. We\u2019ll have to rely on customer reviews and those are average to say the least. While most agree that it doesn\u2019t produce more or less noise than other fans in its class, many do agree that there is some electrical noise and rattling noise that comes from it. So overall, this fan will tend to be on the noisy side.\r\nVersatility\/Modern Features\r\nThe Comfort Zone CZ310R includes an exclusive removable cover that will keep hot and humid air out of your home if the fan isn\u2019t currently in use. The fan also comes with a removable bug screen to keep any pesky bugs out of the fan and out of your home. While all these new features are fantastic, consider the Bionaire Dual Window Fan if you\u2019d like something more traditional and mainstream.\r\nValue\r\nThe Comfort Zone CZ310R has many \u2018firsts\u2019 we\u2019ve seen in a fan, but it also has a modern feature: a remote control. Consider the Genesis A1 if remote controls aren\u2019t a selling feature for you, but it\u2019s always nice to be able to control your fan from your couch. The fan only weighs 6.5 pounds too, so it will be easy to transport from room to room if you decide to use it as a table fan.\r\nComfort Zone CZ310R Wrap Up\r\nThe Comfort Zone CZ310R\u2019s electronically reversible fan motor allows cool and exhaust functions to work at the same time for a consistently fresh room. The removable table feet is another first that we greatly appreciate that gives the fan untold versatility. Now if we could do something about accurate measurements, like what sized windows are best, we could really be in business.