"Chris Harris" wrote in message
...
I know plenty
of people that have DIYed an unvented
cylinder.
You have to be BBA approved to fit an unvented cylinder.
Not in this country. What is BBA?
Stop trying to be know-it-all. In the UK you need to be BBA approved to
fit a pressurised cylinder.
Same to you. I don't live in the UK, check my eamil address. So not in
this
country is a fact!
This uk.d-i-y. What country is fk? Falklands?
There is a big difference. A heat bank and thermals store instantly
heat
incoming mains water. The stored water is "primary" water and is heated
by
the boiler. It is the same water, generally, as the boiler water and
will
have inhibitor in it. A thermals store has an immersed coil and a heat
bank uses a plate heat exchanger with higher flow rates.
Both thermal stores and heat banks can provide the CH from a flow and
return
taken off the bottom of the cylinder. These are called "integrated"
stores. There are also DHW only stores and heat banks.
An unvented cylinder is similar to vented cylinder, except is used high
pressure mains water, while a vented uses low pressure water from a cold
water tank.
It is best you use a vented thermal store http://www.albion-online.co.uk
(see the Mainsflow) or heat bank (see DPS or Range) as these can be
DIYed.
Some heat banks don't even need an overflow, so can be fitted in the
centre of the house.
Range and Albion products are available from most plumbers merchants.
Thanks for taking the time to explain that.
Now if I have the boiler downstairs along with the heat bank, and the CH
is
taken off the cylinder, which is unvented, I can't have radiators
upstairs?
With a vented the rads have to be below the heat bank, with an "unvented",
or pressurised, heat bank the rads can be anywhere and the heat bank can be
anywhere. Most have a vented heat bank on the first floor, which is above
all rads.
Can the radiators be feed from/through
the heat exchanger? Or alternatively
I guess you pressurise the storeage
cylinder as for an unvented system?
If it is pressurised, then the rads can be taken off the bottom of the
cylinder.
Best go for a DHW only heat bank or thermal store with a boiler heat
transfer coil. Have the CH circuit pressurised. Then the heat bank can
located anywhere and rads anywhere.
---
--
Checked by AVG anti-virus system (
http://www.grisoft.com).
Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003