Good and high-quality equipment. The post service is really not encouraging. Old clients don't have good software support, and that's not a good thing.
There is a factory here that produces heating boilers of the Unilux brand. You can also buy them here. Boilers are relatively inexpensive, simple and reliable. All spare parts are always available.
Excellent boilers and radiators, for how many years everything has been working in a private house without problems, I recommend it. There is a service that helps in case of anything, I contacted you by phone a couple of times, consulted you and was able to do it myself even after the end of the warranty period.