Unvented Indirect / Low Pressure

[NewHouseOwner]

A local firm have quoted for an unvented indirect Megaflo cylinder to cure low pressure hot water around the entire house to run off an ancient Kingfisher 2 boiler.

Mains cold water to the kitchen sink is good but all other cold and hot water around the house is dire.

Is this a good solution (the firm is quoting £1400 inc vat). There are two showers, 1 bath, kitchen, utility (rarely used). Usually 4 people.

I have a few questions please...

They state slimline Megaflo 150l so I take it will be a Heatrae Sadia Megaflo?

Is that a reasonable price for a local reputable firm?

Is this solution really going to cure the low water pressure?

Can an immersion heater backup be fitted to suck a tank?

Is there anything I should think about / know about such an istallation?

Thanks.

 

[ShaunCorbs]

Won’t be a mega flow as there 1k just for that

 

[NewHouseOwner]

Ok thanks, it's just that they quoted a "Supply and install a new 150ltr indirect slimline Megaflo unvented hot water cylinder". Megaflo is trademarked, that's why I thought it would be a Heatrae Sadia.

I am worrying that these need to be serviced yearly. Are there better low maintenance solutions?

 

[fezster]

Have they measured your incoming flow rate and dynamic pressure to ensure an unvented cylinder is suitable? It should be a minimum of around 20 litres / min with 2 bar working pressure. You will also need to ensure your internal pipework is upgraded, especially to showers which should be in 22mm.

From personal experience, don't bother with a Megaflo tank. The internal expansion bubble is useless and there are better / cheaper brands available.

 

[Vee]

Just check the exact make of the one quoted for. They all need maintenance whether internal or external air space.