/Tag: Combi boiler

Combi boiler

Combi Condensing Boiler installed in Datchworth, Herts

Central Heating Update in Datchworth, Hertfordshire

Datchworth combi install 2We updated the central heating in this home in Datchworth, near Stevenage by removing a fully pumped open vent system (cold water tank and hot water cylinder) and installing a new combi condensing boiler. A combi boiler heats water instantly and therefore requires no cold water storage tank in the loft or hot water cylinder in an airing cupboard.

As part of the installation we recommended adding a Magna Clean filter. This means that when water circulates around the heating system the magnetic filter captures the sludge and iron filings from the system before going back in to the boiler. A simple clean of the filter twice a year is all that is required in order to keep your heating system clean and avoid costly breakdowns.

Magna Clean filters are also recommended by boiler manufacturers who insist upon power flushing and filters to validate any future boiler breakdown insurance claim. Some manufacturers are now offering up to 7 year guarantees so do expect some preventative measures to be undertaken on installation.

As well as the Magna Clean filter, we also installed a Combi Care kit. This is an additional part that helps prevent boiler breakdowns by filtering the mains water before it goes into the boiler.

This central heating installation also required a Condensing Trap outside to remove waste water from the heating system. We installed a 40mm pipe outside to prevent any freezing of the condensing water.

Click here to request a quote for a central heating job like this one.

Bathroom and Combi Boiler installed in Datchworth, Herts

Significant cost-savings made by installing like-for-like bathroom and combination boiler

Datchworth Bathroom and boiler installThis client in Datchworth, near Stevenage in Herts had a bathroom that looked tired and out-dated. They wanted a new more modern looking bathroom. Plus, their hot water cylinder leaked and was obsolete. Concerned with high costs, we advised this client to:

1. Install a like-for-like bathroom

To keep replacement bathroom installation costs low, we always advise our clients not to move bathroom fixtures unless it’s absolutely necessary. This significantly reduces the installation time by reducing the time needed to add new pipework. Less labour time equals a lower cost! But at the end of the day, it’s the customers choice.

2. Install a combination boiler

We advised this client that the best option to replace their old fully pumped open vent system was a Combi boiler. Combi boilers are not suitable for every home or household but this client lives in a chalet bungalow and their children have left home meaning there was less demand in the house for hot water. The Combi boiler efficiently heats water instantly and therefore there was no need to replace the tired hot water cylinder, cold water storage tank and Feed & Expansion tanks. This suited the client because he was going to change his boiler for a new one anyway. So it was cost efficient to change the water and heating system at the same time as installing the new bathroom. This greatly reduced on-going costs on his old system. Click here to see photos and read more about this combination boiler installation.

Get a quote to install a combi boiler or new bathroom.

Which Central Heating System should I choose?

Megaflow Cylinder Central Heating SystemA short guide to choosing the right hot water cylinder or boiler

Choosing a central heating system is an important investment. It can save you energy and fuel – therefore money. In addition, choosing the right central heating system can add value to your house. But it is not just a case of choosing a brand of boiler there are other things to consider.

There are three main types of heating systems to choose from:

  • Combi Boiler Systems
  • Gravity Fed Open Vent Systems
  • Megaflow or Pressurised Systems


What are the advantages and dis-advantages of each of these hot water systems?


Combi Boiler Systems (or combination boiler systems)

This type of boiler system heats the hot water on demand. This means that you no longer need a cold water storage tank in the loft or a hot water cylinder in the airing cupboard. So this is often the type of boiler system chosen when space is limited such as in flats or when a loft has been converted. It is one of the cheapest options however it is connected to the mains water so when more than one utility is used, for example if you are having a shower and someone downstairs is washing up, then you will notice a drop in pressure to the shower head.  So these types of systems are not recommended for homes used by families with children or houses with multiple bathrooms.

Gravity Fed Open Vent Systems

This is the most common used hot water system installed in homes in the UK.  However, since the introduction of combi boilers and megaflow pressurised cylinders, many houses have been upgraded to these more efficient central heating systems. If your home already has a gravity fed open vent system, it is often far more cost effective simply to upgrade your existing water cylinder and boiler rather than install a new expensive system. However the disadvantages of these systems are that they rely on gravity so pressure is often lost in flats where a large water tank cannot be installed in a loft. Furthermore, there is a higher risk of damage from frost during the winter months as the complete system is usually installed in a loft.

Megaflow High Pressure System

These are often used following a loft conversion because they can be installed in a garage or other area of the home. They do not rely on gravity but take water directly from mains water and operate at higher pressure negating the need for shower pumps etc. This system is ideal for larger houses with families – especially if you have more than one bathroom or shower room. The disadvantage of this system is that it is more expensive than both the gravity fed hot water system and the combination boiler. Plus it is not possible to guarantee old pipework due to higher water pressures.

We installed a Megaflow High Pressure System in Tewin.

If you would like to discuss which central heating system is right for your home, contact us for a free no obligation quote, call 07977 924459 or email milton@homewoodplumbing.co.uk.