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About BTL Listed Products
The BACnet Testing Laboratory is an unbiased testing lab for building control products. The BACnet Testing Laboratories (BTL), which is part of BACnet International, offers a product testing and listing program for products that have BACnet capability. The BTL's authorized test laboratories will test the BACnet functionality of a product to a set of requirements developed by the BTL that are based on ASHRAE Standard 135.1P. Products that meet the BTL's requirements are eligible to receive a BTL listing.