Horizontal DHW tank?

[Alan Ambrose]

Sorry for asking so many questions recently.

 

I'm a bit height challenged 😄. More importantly, the little attic I plan to put the DHW tank is too (1.6m at the inside ridge). Any reason why I shouldn't use a horizontal tank e.g. :

 

Tempest horizontal indirect hot water storage cylinder ? 1.75m long x 0.65m high for 300L.

 

[Alan Ambrose]

[JohnMo]

No as long as you can get up and into it's final position. Then insulate everything really well.

[Alan Ambrose]

Ah thanks. Reporting back, there are a few other manufacturers but none seem to have an energy rating better than 'C'. They're all about 2m long by 0.55m diameter for 300L.

 

Edited 8 hours ago by Alan Ambrose

[JohnMo]

32 minutes ago, Alan Ambrose said:

Reporting back, there are a few other manufacturers but none seem to have an energy rating better than 'C'.

Most cylinders aren't much better that C. You can get A rated ones, but the cost premium is huge. So why bother? If keeping water a 50 degs or lower the losses are pretty small anyway. You are likely to loose way more heat by poor pipe install/insulation (or lack of) and not providing thermal current stops by correct pipe orientation.