Combi Boiler

The most common type of boiler is the Combi Boiler or the Combination Boiler to give it its full title because it has the combined role of heating both the hot water and the central heating system. Instead of the hot water being stored such as in the System Boiler or a Traditional Boiler, the Combi Boiler heats the water as required, directly from the tap or shower. This has 2 main advantages. The water comes out at mains pressure as it is coming direct from the source so you have maximum pressure and don’t require pumping water from a storage area. Also, this is the most efficient way to use your hot water as you are only heating water you use and not paying to heat and then store water which you may or may not use.

Modern Combi Boilers are very quiet and compact meaning that they no longer have to be in out of the way places and are often fitted discreetly into kitchens and bathrooms reducing the need for costly pipework fitted throughout the property. Combi Boilers also do away with the need for a water tank in the loft as they heat directly from the taps so are ideal for homes with limited space or in homes where you need to do away with the water tank to allow for a loft conversion for example.

Modern Combi Boilers are also highly energy efficient.

System Boilers

A system boiler is generally larger than a Combi Boiler, as it requires an extra cylinder for hot water storage (central heating expansion vessel). These are useful in those properties with multiple bathrooms or have a need for hot water being supplied to multiple taps at the same time.

A system boiler has the heating and hot water systems built in as part of the full unit. This does away with the need for a separate cold or hot water storage area (feed and expansion cistern), thus reducing the space required if the loft space is needed. It also makes the installation process easier and cleaner as all the operational parts are contained within the system itself. Again, they are Highly Efficient and economical to run and are also compatible with Solar Water Heating Systems to reduce your carbon foot print.

These are particularly suitable in larger households or those with more than one bathroom where you require more hot water than a Combi Boiler could provide. Or those households where a power shower is installed or would like quick filling baths due to the built-in pump providing a high flow rate.

Traditional Boiler

A Traditional Boiler (or Regular Boiler/Conventional Boiler) requires a cold-water storage tank to supply the boiler and a hot water storage tank to maintain the hot water levels for the central heating system. These tanks are usually kept in the loft. For this reason, a conventional boiler requires more storage space than a Combi Boiler or a System Boiler.

A Regular Boiler is suited to older properties which have older central heating and hot water systems like old radiators which are not designed for more modern high water pressure systems.

Again, this may be your best option for larger properties with multiple bathrooms or have a need for a lot of hot water use or where water pressure is low.

These types of boilers are also compatible with a Solar Water Heating System.

Fuel Efficiency and SEDBUK

The efficiency of boilers uses the SEDBUK scale which is the Governing Organisational Body appointed in the U.K. From 2005 to 2009 the award system of a boiler was a rating of A > G.

From 2009 this changed to a simple percentage (%) and from 2010, new boilers must be at least 88% efficient meaning that they utilise at least 88% of their fuel source in providing hot water.

Condensing Boilers

Condensing Boilers recycle “waste” gases which would normally be dispelled outside via the flue to generate additional; energy to heat the water. These boilers are especially energy efficient since they are using every available energy source to generate heat from. If you are looking for the most efficient boiler to minimise of Carbon waste then a Condensing Boiler is your best option. Modern boilers are mostly all forms of condensing boilers now with very few exceptions as it is the most efficient way of producing heat.


  • Boiler Repairs
  • Boiler Servicing
  • Boiler Replacement
  • Boiler Sizing
  • Boiler Maintenance Care Plan
  • Power Flush
  • Flue Safety Check
  • Central Heating Installation
  • Radiator Repairs and Installs
  • Traditional and Designer Radiators
  • Immersion Heater Repairs and Installs
  • Hot/Cold Water Tanks and Cylinders
  • Gas Pipe Sizing
  • Gas Pipe Installation
  • Gas Meter Installation
  • Gas Leak Repairs
  • Gas Safety Certificates (Landlords and Homeowners)
  • Gas Fire Installation/Removal

As an ALL TRADES Company, Glasgow Plumbing Services will provide all the tradesmen you need to get the job done. We have Plumbers, Heating Engineers, Joiners, Tilers, Plasterers, Slaterers, Brick Layers, Roofers, Electricians, Locksmiths, Architects, Interior Designers, Handymen and anybody else you need for your job. We have it covered…



24hr Plumbing Services including; Emergency Plumbing, Drain Cleaning, Bathroom and Kitchen Installs, Wet Rooms and Disability Bathrooms, Leaking Taps, Appliances Fitted, Gutter Clearing, Blocked Downpipes, Pipe CCTV Recording etc.

No job is too big or small...


Our Gas Registered Heating Engineers are experienced and qualified in all aspects of heating including; Boiler Repairs, Boiler Installations, Radiator Repairs and Servicing, Power Flushing, Gas Oven and Gas Fire Installations, Landlord Gas Safety Checks etc.

No job is too big or small...


We work with businesses and commercial spaces to provide quality commercial plumbing and heating.

Whether you are an independent business looking for a quick repair or you are  managing a chain or restaurants or offices looking for bathroom or kitchen installations.

All Trades

We are an All Trades Company so we supply whatever tradesmen you need to get the job done. There is no need for you to Project Manage as we cover everything and do it all for you.

Just let us know what needs done and we will arrange all the tradesmen required for the job.

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If you are looking for the Professional Heating Engineer in Glasgow, give us a call on 0141-530-1315 or email us with the Contact Form opposite. 

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