Recently our Zehnder Commissioning Agent Steve Lamberg reported an issue at some of his customer maintenance calls: Zehnder units not getting any supply air because the exterior ports were clogged. Dust builds up on the metal grill, then there is some moisture, and the result is a paste that prevents supply air from getting in.

While this may not be an issue for some of our customers, we wanted to ensure that all Zehnder owners are aware of this maintenance step and check their outside ports, especially the supply ports, as part of their usual seasonal maintenance. If you check your exterior ports and they are dirty or clogged, here is what to do.

Do you hear that? Come a little closer and quiet down. Now do you hear it? That’s the sound of a Zehnder ComfoAir 70 (CA 70) providing fresh air to your studio apartment, your home office, or small workout space. Perhaps you’re more familiar with the (almost no) sound of a Zehnder system in a larger home, regardless the end goal is the same; To remove stale used up air from your living space and replace it with fresh filtered air while recovering the heat from exhausted air. Wondering how you can achieve this feat in your own small space without convoluted ducting and having to tear out drywall? Perhaps your building a new tiny home and need a way to ventilate while conserving heat? Read on to find out what benefits the ComfoAir 70 can breathe into your space.