Recently, a question was asked "Would this freeze shut in a northern winter climate?". While anything is subject to limited function when encased in ice, the DryerWallVent has proven to withstand harsh climates very well.
With over 50,468 installs to date, even in cold places like Minot, ND (the picture below shows Hyatt House's multiple installations), there have been zero complaints about freeze problems. However, it is always a good idea to check your exterior vent before turning on the dryer after a good ice storm. Pairing the DryerWallVent with The Defender not only doubles your protection against animal intrusion, but the Defender will also deflect ice and snow from the venting exhaust.