5 year on pro and 7 year on plus. Customer can pay for extended warranty. Got email from rep the other day. For the pro it's £30 a year for a max of 10 years but needs to be bought in one hit so 3 years would be £90 for example and the plus is a bit different but will cost £150 to get 10 years.
Personally I think they are great, they can be range rated, easy to install and work on, their app registers the boiler and the gas safe registration free of charge and I find tech support to be very good. They are expensive though.