Sealed heating system basic question...

[jackecole]

Do sealed heating systems (ie with a combi, or a system boiler) reach temperatue and get hotter quicker than older conventional open vented systems??

 

[gblades]

No you are still just taking the energy from the gas and putting that into the water.

In theory pressurised water has a higher boiling point so the radiators could be made hotter without the water boiling but I suspect the realativly low pressure in the system will make this effect very small.

 

[jackecole]

ok, thanks for your help.

I just thought as it was higher pressure, and boiling point was lower at a sealed pressure, then it may get quicker faster. Open vented systems usually have about 0.2-0.4 bar from header tank to downstairs rads in a normal 3 bed semi. In a sealed system it is usually 2 bar when heated or 2.5 bar even. Thus the reason for my question.

Thanks for your help once again.

 

[WDIK]

the boiling point of water is higher in a sealed system

 

[jackecole]

sorry i meant that!!! really

 

[bengasman]

Though there is no technical or scientific reason why sealed systems would warm up quicker, wherever I have changed a system from open to sealed, they seem to respond better.
Sealed systems are less prone to corrosion, and are likely to keep performing better compared to open vent systems.

What made you ask the question?

 

[ajstoneservices]

If all the stats in the system are working, a sealed system should not get hotter than an open vent one or vice-versa. They may get hotter quicker and lose less heat.

 

[bengasman]

If all the stats in the system are working, a sealed system should not get hotter than an open vent one or vice-versa.

I know, I cant explain it, but it seems to happen