I'm looking to buy a new unvented cylinder for my new house. I had a
Megaflo in my last place and I was happy with it. Looking arounf the
merchants, I see quite a difference in price between Megaflos and
equivalent sized Aristons (£100). Another advantage is that the
Ariston has a smaller diameter making fitting a little easier.
Can anyone tell me if there are any significant advantages to the
Megaflo over the Ariston?

Steve

Steve Benjamin wrote:
Can anyone tell me if there are any significant advantages to the
Megaflo over the Ariston?

Steve

The Ariston has all electrical and plumbing connetions made from the front,
the capacity is it's true water capacity unlike the Megaflow as the
expansion vessel is external on the Ariston, internal on the Megaflow. The
Ariston reheat time is ~claimed~ to be about 15% quicker.

Ariston prices are good; you could get a slim 505mm, 210 litre indirect for
£453.70, direct £371.80 both plus vat of course.

Toby.

Steve Benjamin wrote:
Can anyone tell me if there are any significant advantages to the
Megaflo over the Ariston?

Steve

The Ariston has all electrical and plumbing connetions made from the front,
the capacity is it's true water capacity unlike the Megaflow as the
expansion vessel is external on the Ariston, internal on the Megaflow. The
Ariston reheat time is ~claimed~ to be about 15% quicker.

Ariston prices are good; you could get a slim 505mm, 210 litre indirect for
£453.70, direct £371.80 both plus vat of course.

Toby.

Steve Benjamin wrote:
=

I'm looking to buy a new unvented cylinder for my new house. I had a
Megaflo in my last place and I was happy with it. Looking arounf the
merchants, I see quite a difference in price between Megaflos and
equivalent sized Aristons (=A3100). Another advantage is that the
Ariston has a smaller diameter making fitting a little easier.
Can anyone tell me if there are any significant advantages to the
Megaflo over the Ariston?
=

Two things to be aware of =

1) The incoming main must be 25mm (c. 3/4" ID) all but very new houses
have 1/2" lead, 20mm plastic.

2) Is the Ariston really a stainless steel mains pressure _unvented_
cylinder? I would expect that
a Megaflow which is say 750 would be 650 if its name is Albion or
Telford I would have difficulty beleiving that anything under =A3400 was
the real thing. =

Also note that the other makes use a added on expansion vessel (=A325)
whcih I think is included in the box. =


IMHO this is to be PREFERRED over the Megaflow where the air bubble
dissappears over time leading to over pressure dribbles and a reduction
in the life of the first pressure releif unit. =



-- =

Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html

"Steve Benjamin" wrote in message
om...

I'm looking to buy a new unvented cylinder for my new house. I had a
Megaflo in my last place and I was happy with it. Looking arounf the
merchants, I see quite a difference in price between Megaflos and
equivalent sized Aristons (£100). Another advantage is that the
Ariston has a smaller diameter making fitting a little easier.
Can anyone tell me if there are any significant advantages to the
Megaflo over the Ariston?

Steve,

Go for a vented heat bank, not a thermal store, which is much better than an
unvented cylinder. many local authorities are switching to heat banks as
they are fed upo of overflows dripping from unvented cylinders.

http://www.heatweb.com
http://www.range-cylinders.co.uk (go to thermal storage)

A heat bank:

- gives higher flow rates.
- operates on low pressure.
- can be DIYed. Unvented cyoidner have to be installed by a BBA approved
fitter.
- eliminates inefficient boiler cycling, so cheaper to run.
- Fast re-heat
- does not have an air bubble that requires reinstating every year
- does not require an annual service. If you have a blow out (they make a
mess) an insurance company wiil not pay up without the annula service.
- Can be DHW only or provide CH and DHW from the same cylinder
- Can be packaged all in one unit (you just connect up pipes to the boiler
and rads, with no design work involved)
- Hot water temp at the taps user selectable
- A heat bank does not scale up.
- Can have electric backup for CH and DHW when using an integrated heat bank
or thermal store.
- No complex pressure control and reduction valves.
- can be run at full mains pressure.
- A DHW only heat bank/thermal store costs less than an unvented cylinder.

To to Google and look at the recent thread: Cylinder v thermal store




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