Vented & Unvented whats the difference and benefits?
- Thread starter scifipaul
- Start date
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Vented system= big cold water tank in loft feeding copper cylinder in the house. Fairly low pressure hot water.
Unvented system= cold mains is fed straight into usually a stainless steel
hot water tank. Hot water at mains pressure. No header tank in loft required.
Provided you have a good mains flow and pressure 25 litres/minute
and approx 3 bar pressure. Unvented cylinder is the one to have.
Connect this up to a system boiler (no central heating header tank in loft)
and the system will deliver hot water faster and be more reliable than a combi boiler. Unvented cylinders usually have guarantee of approx 10-25 years so fit and forget.
Unvented system= cold mains is fed straight into usually a stainless steel
hot water tank. Hot water at mains pressure. No header tank in loft required.
Provided you have a good mains flow and pressure 25 litres/minute
and approx 3 bar pressure. Unvented cylinder is the one to have.
Connect this up to a system boiler (no central heating header tank in loft)
and the system will deliver hot water faster and be more reliable than a combi boiler. Unvented cylinders usually have guarantee of approx 10-25 years so fit and forget.
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You need someone with a g3 compliance certificate, they can check pressure and install if suitable.
The qualification you need to fit unvented cylinders properly.
These things are more dangerous than gas boilers if done badly.
If done properly they are perfectly safe - so don't let that put you off.
These things are more dangerous than gas boilers if done badly.
If done properly they are perfectly safe - so don't let that put you off.
So to clarify
An unvented system is better than a vented system?
An unvented system is more economical to run than a vented?
I have a 4 bedroom house, i should get an unvented system rather than a combi?
As much info as I can get is appreciated.
Thanks
An unvented system is better than a vented system?
An unvented system is more economical to run than a vented?
I have a 4 bedroom house, i should get an unvented system rather than a combi?
As much info as I can get is appreciated.
Thanks
G3 is a building regulation.
Unvented cylinders should be installed by plumbers who hold a G3 certificate to ensure it meets building regulations.
Provided you have good pressure and flow rates, you should go for the unvented.
The only benefits of a combi are they are cheaper to install and take up less space.
Unvented cylinders should be installed by plumbers who hold a G3 certificate to ensure it meets building regulations.
Provided you have good pressure and flow rates, you should go for the unvented.
The only benefits of a combi are they are cheaper to install and take up less space.
They are not necessarily more efficient.
they are more hygienic.
As to suitability - you could have 8 bedrooms, but with only one bathroom a combi would be fine - if not better.
What is your hot water requirements?
Only if you incoming water main meets those requirements will an Unvented be better than open vented.
they are more hygienic.
As to suitability - you could have 8 bedrooms, but with only one bathroom a combi would be fine - if not better.
What is your hot water requirements?
Only if you incoming water main meets those requirements will an Unvented be better than open vented.
So on that you can look at circa 200 litres. But you still need to know the capacity of your water supply ... dynamic pressure, pipe size, flow rate as well the the feasibility of running the all important safety discharge pipe work.
Are you talking in relation to Combi or an unvented?
Unvented.
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