The coil in many unventeds spirals down and then back up in a larger diameter on the outside of the inner coil.
The purpose is to keep the main part of the heating coil lower down to heat more of the tankfull.
Because it goes down and then up it does not encourage thermal circulation. If you could give it a little push it might work a little!
The Unvented Qualification is not related to CORGI. It is issued by the CITB and they issue a silver photocard with WATER on the front and the unvented on the back with the date taken and any expiry date.
Many CORGI registered people have the unvented certificate but there are also some non CORGI who have it as well.
Unvented cylinders are notifyable under the Building Regs and the holder of the certificate can notify without normally incurring any charge. So far CORGI have not included it with their boiler notification scheme ( Yet ! )
Tony Glazier
The purpose is to keep the main part of the heating coil lower down to heat more of the tankfull.
Because it goes down and then up it does not encourage thermal circulation. If you could give it a little push it might work a little!
The Unvented Qualification is not related to CORGI. It is issued by the CITB and they issue a silver photocard with WATER on the front and the unvented on the back with the date taken and any expiry date.
Many CORGI registered people have the unvented certificate but there are also some non CORGI who have it as well.
Unvented cylinders are notifyable under the Building Regs and the holder of the certificate can notify without normally incurring any charge. So far CORGI have not included it with their boiler notification scheme ( Yet ! )
Tony Glazier