Header tank in bathroom

[johng123]

Hi there, Newbie here

I am building a small 40'x20' log cabin and am planning on having a vented direct cylinder in a substantial cupboard in the bathroom. I'm planning on putting the header tank above the cylinder, since there is no loft space.

Since the cold header tank will be in close proximity to warm moist air, I am worried that there will be condensation on the cupboard walls and underneath the header tank.

Is this an problem? And if it is, can I solve it by insulating and isolating the header tank from the bathroom?

Thanks

 

[Steve001]

Look at a combined cylinder, is there going to be enough pressure? I wouldn't worry about the condensation, as long as it's fitted with a proper jacket.

 

[justlead1]

Hi, It not normally an issue, as heat loss from cylinder produces warm air circulation which in most cases neutralises the condensation potential. Leave enough space around the installation for air circulation and insulation if found to be needed.

 

[Gray0689]

Why don't you use an unvented cylinder if you have water pressure far better than a gravity cylinder

 

[johng123]

Gray: I have low and unreliable mains pressure, so am planning on a using a twin pump for hot and cold. I am also a diyer, so want to avoid unvented
Steve: Combi cylinders are a bit low on capacity, and I'm not short of space. I want to get 20 mins of pumped shower with 1.5bar twin pump

Thanks for replies

 

[stevetheplumber]

Gray: I have low and unreliable mains pressure, so am planning on a using a twin pump for hot and cold. I am also a diyer, so want to avoid unvented
Steve: Combi cylinders are a bit low on capacity, and I'm not short of space. I want to get 20 mins of pumped shower with 1.5bar twin pump

Thanks for replies

hope youve got room for a big cws tank as you will need it especially if the main is poor and not making up what your using

 

[johng123]

Steve: How many litres hot and cold do you think I'll need? Thanks, J.

 

[justlead1]

Hi In twenty mins a 15 mm pipe with a head of 15 m and say 8 metres long will discharge 0.75 litres per second. (Boxes Formula) Thats 900 Litres. The frictional resistant on fittings, bends and shower rose will reduce the amount.