ZONEFIRST offers many varieties of zone dampers for your HVAC comfort needs, from our rectangular ZDB’s and ZDS’s, to our round RD and RT models, just to name a few. And with each style of damper, we offer many standard sizes that may fit your needs. But, did you know that ZONEFIRST will also make custom size zone dampers?For years, ZONEFIRST has and continues to offer custom-size products for their rectangular family of dampers, the ZDB’s, ZDS’s, AOB’s and IOB’s. The smallest size damper is 8 x 8, while the biggest size we make is 36×36.What about this? Has this happened to you? You just made the smart decision to install zoning in your building and you need to get six dampers that are 15 x 11 inches. But you can’t find that size anywhere on our ZoneFirst.com website or ZoneDampers.com. All of our standard sizes are made with even numbered inches so now you think you’re out of luck.

But not to worry – we will custom make those dampers for you!Give us a call at 1-877-604-1044 if you are in need of custom-sized rectangular dampers. We will be happy to assist you.Note: custom sizes are only available on rectangular shape dampers.

Round dampers can only be made in the standard sizes that are listed on our site.