Is there an independent testing agency to certify BACnet products?
Yes. There is an organization called the BACnet Testing Laboratory (BTL) for testing and certifying BACnet products. This organization was created by the BACnet Manufacturer’s Association (BMA) www.bacnetassociation.org to have an independent testing agency for BACnet. In February of 2001, BTL began accepting applications for product testing based on the draft standard ASHRAE 135.1P. This testing process is explained in more detail here. • Do prorietary extensions to BACnet make devices incompatible? Not necessarily. There are essentially three areas where BACnet can be extended: Object Properties, Services and certain Enumerated Values. If a device implements any of these extensions, it is still interoperable with other BACnet devices that share the standard objects, properties and services that it implements. If a device implements non-standard objects, or non-standard properties of standard objects, it may still be possible to interoperate effectively with those objects and properti
