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Which system would you choose?

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Discuss Which system would you choose? in the Central Heating Forum area at Plumbers Forums

B

Barn_Style

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10
4 bed semi-detached barn conversion over 3 floors. 18 radiators, two bathrooms, one d/s cloaks.

Any pros and cons to the below system boiler set ups? Which would you choose? Want to be able to run two showers simultaneously without an issues.

Option 1
Vaillant ecoTEC Plus 624
Gledhill stainless lite unvented 180l
Magnalean atom filter
Nest 3rd generation thermostat & stand
£3900 fitted (inc removal of current boiler and gledhill boilermate)

Option 2
Vaillant ecoTEC Plus 630
Heatrae Sadia Megaflo Eco Slimline Indirect 200i Cylinder
Magnalean atom filter
Nest 3rd generation thermostat & stand
£5000 fitted (inc removal of current boiler and gledhill boilermate)
 
Last edited:
Is water pressure/flow rate good enough for 2 showers. I personally prefer megaflo cylinders. Both similar in price for appliances and cylinder so it’s a case of which engineer you prefer. There is a thousand pound difference without seeing job hard to tell but I would expect somewhere around £4500
 
Gasmk1 said:
Is water pressure/flow rate good enough for 2 showers. I personally prefer megaflo cylinders. Both similar in price for appliances and cylinder so it’s a case of which engineer you prefer. There is a thousand pound difference without seeing job hard to tell but I would expect somewhere around £4500
Click to expand...
Its the same engineer. Option 1 was his spec, Option 2 was ours
 
Barn_Style said:
Its the same engineer. Option 1 was his spec, Option 2 was ours
Click to expand...
Barn_Style said:
Its the same engineer. Option 1 was his spec, Option 2 was ours
Click to expand...

Gasmk1 said:
Is water pressure/flow rate good enough for 2 showers. I personally prefer megaflo cylinders. Both similar in price for appliances and cylinder so it’s a case of which engineer you prefer. There is a thousand pound difference without seeing job hard to tell but I would expect somewhere around £4500
Click to expand...
Water pressure is approximately 7 litres per minute
 
Also not suitable for an unvented you need a min of 20 lpm ideally for two 35 lpm dynamic

Also 4 bar pressure

Also has anyone carried out a heat loss to see what size boiler you actually need ?
 
How long to fill a 1l container eg bottle etc
 
To boost / increase the water yourselves or install an old style system eg tanks in the loft
 
Have a look at this if you really want an unvented cylinder 8.56 for a litre

dabpumps.com

EsyBox | DAB Pumps

EsyBox by DAB is for pressurization, gardening, irrigation, agriculture and irrigation and to draw water in residential building service and commercial building service. It is "all-in-one" and ready to use for an easy and efficient management of residential pressurization: the presence of the...
dabpumps.com dabpumps.com

dabpumps.com

EsyTank | DAB Pumps

dabpumps.com dabpumps.com

Also would do a Heatloss for the property as you maybe oversizing by a lot at 30kw
 
As above you definitely need to look at the pressure and flow rates of the mains to use two bathrooms at once. The Esybox system Shaun has linked to is an excellent option to solve this.
I would also look at splitting the heating system if possible. Really you should be able to control each floor separately with a thermostat on each floor. This isn't always possible if you are using the existing rads and pipework but I would definitely ask for it to be looked into.
I would try and specify to local engineers what you want in performance and then let them work out how etc. That way they do all the working out and are responsible for it performing correctly once completed.
 
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