Depends how much warranty you want and how much hot water.
Main is 5 years, 600 is 7 and 8 is 10 years and all are the same boiler. We've fitted maybe 200 at this point between them and are really haven't had many problems.
A combi will always have a reduced rate and have to throttle it back to get hotter 12l/m at the above which is plenty. If you want to let it rip and want tons of HW stick in a Platinum 40 for 4 odd litres extra a min but you'll pay extra for it.
The platinum is a old design but its a great boiler, imo the best baxi might have ever made. Its a duotec and they changed the name because they brought the new ones out. My only issue with them is they are heavy as fuck like a worcester expect very reliable.
Depends how much warranty you want and how much hot water.
Main is 5 years, 600 is 7 and 8 is 10 years and all are the same boiler. We've fitted maybe 200 at this point between them and are really haven't had many problems.
A combi will always have a reduced rate and have to throttle it back to get hotter 12l/m at the above which is plenty. If you want to let it rip and want tons of HW stick in a Platinum 40 for 4 odd litres extra a min but you'll pay extra for it.