Megaflo And Combi Boilers [Side-By-Side Comparison]

By | 3rd November 2017

Welcome to our quick guide to Megaflo cylinders, and how using them compares with combi boilers.

Is A Megaflo A Boiler?

No. Megaflo is a range of hot water cylinders produced by Heatraesadia.

Whilst Heatraesadia do produce boilers (the Electric Flow), a Megaflo is a not a boiler.

What Is A Megaflo?

They are available as vented or unvented cylinders.

You can see our explanation of vented and unvented cylinders here.

It’s a storage system for water, so you will still need a boiler.

Megaflo & Combi Boiler Comparison

The question is, why would you need a Megaflo cylinder in the first place? 

Large properties, or those with high hot water demand (for instance, running 2 showers at the same time) will rarely make do with a combi boiler.

Combi boilers heat hot water on demand, and they have no water storage facility.

So, even huge combi boilers like the 42CDI from Worcester, will struggle to keep up with hot water demand in large properties.

And, that’s where a cylinder combined with a “system” boiler comes in. This hot water can be stored, and pre-heated.

The Cost Of Installing A Megaflo [Compared To A Combi]

We’ve created a cylinder installation cost guide here.

The cost of installing a cylinder could be anywhere from £500-2,000.

Prices for the cylinder itself will vary.

As an example, a 210L Megaflo will cost around £600 (and even then, prices vary depending on the exact model). That’s before factoring costs for additional parts and labour.

The difference in cost between a Megaflo setup and combi setup is that a combi doesn’t require a cylinder.

The cost of a combi and system boiler is roughly the same. But with a system boiler, you’ll need to account for a cylinder price, and the cost of installation.

What Size Megaflo Do I Need?

Because of the complexity and cost of installing a cylinder, you’ll need to speak to a qualified engineer.

They’ll need to spec your home dependent on the amount of bathrooms, and your demand for hot water.

To install a Megaflo system, you’ll need a boiler, and a cylinder.

You can see what size cylinder you need here.

And, if you’re looking to upgrade your boiler, you can see what size boiler you need here.

You can also get quotes from qualified engineers by clicking here.

When You Should Install A Megaflo & Boiler

If the below applies to you and your property, it’s likely a central heating setup with stored water (in a cylinder) is suitable:

  • Demand for high water pressure
  • Need to run 2-3 baths or showers at once
  • Have storage space for a cylinder
  • Have 1 bar pressure (measured at 22mm mains)
  • Have a 16 litre per minute (or higher) flow rate from your mains water

When You Should Install A Combi Boiler

Combi boilers are incredibly popular, and it’s a simpler system to fit.

If the below applies to you, a combi boiler (with no hot water storage) is going to be the most cost efficient option:

  • Have low water pressure
  • No demand for more than 1 tap or shower to be on at the same time
  • Focus on energy effiency
  • Short on space
  • Have a gas, oil or LPG supply to the property

What’s Next?

Hopefully that clears up some confusion.

A Megaflo is a cylinder that works in conjunction with a system boiler, but it’s not a boiler itself.

If you have any questions, leave a comment below and we’ll get back to you as soon as possible.

 

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