Hot water cylinder lagging jacket size

[Blackwexford]

Hi all
Just curious about this. My hot water cylinder in 80cm in height. Looking at changing the lagging jacket as a couple of years old. If I get a 90cm lagging jacket this will just about fit. Would I be better getting a 120cm one. Would it be less efficient due to the extra length
Thanks

 

[Leo]

Which will give the most snug fit, with least amount of air in contact with the tank? Depending on where the tank is, might be worthwhile wrapping even more insulation around the jacket.

 

[Monbretia]

The best thing I ever had around my tank was an old duvet with some old pillows wedged down the back where I couldn't wrap it properly. It actually kept the water hotter than the insulated tank I now have.

 

[Blackwexford]

Thanks guys