Hi . the best are heatrae sadia megaflo invented cylinders. They are a bit more expensive than others but have a very long warranty..
The plumber should be qualified to fit unvented. There is a course to do as there are various safety issues. They should have a card to say they a qualified. What area are you in , I may be able to recommend someone.
Why is that the best for me to buy and what card is it?
Hi .it should say on the back of their gas safe card or may be a seperate accredited card with unvented cylinders stated. Lots of different colleges run the course.usually city and guilds but others run it too .
The megaflo cylinders are preferred by installers. They are tried and tested , have a great reputation .it also has a lifetime guarantee
You will need a 145dd or 170idd
Hi . do you need any more advice? If not would you mind rating me please , thanks
Looks like that's about £800. What does it do better than a cheap £400 one? Does it use less electricity or have higher water pressure?
Only difference I can see if megaflow says it doesnt have annodes
not sure what that does
this one is £390 - http://www.ariston.com/uk/Hot_Water_Storage_Cylinders/Classico_HE_Unvented_Cylinder
its a lot of money for me, just want to be sure before i spend
is there a next best to megaflow that is still good but a bit cheaper?
The Ariston is fine , just don't vexpect it to last as long . should last a long time , so if that's your budget , I would get it . in thee end its all down to steel thickness and quality of welds.
The anodes protect the cylinder from corroding , and should be inspected and changed if needed during annual service
I wouldn't buy anything that uses anodes though . look at Telford , they are cheap and have a good reputation