Central Heating Systems Installed

Radiators & Pump


Tel: 045 892939
087 2530846


PFS Power Flush Systems Ltd is one of Irelands first power flushing companies to specialise in the cleaning and treating of domestic central heating systems.

With domestic households accounting for 28% of total energy use and resulting CO2 emissions, Fernox is committed to helping achieve dramatic increases in heating efficiency and lower fuel bills in-line with Kyoto protocols and national and international guidelines.

Whilst SEDBUK- rated boilers may promise improved savings, without effective water treatment limescale and iron oxide deposits could negate efficiency gains over time.

Fernox products and testing services guarantee maximum effectiveness in hard or soft water areas. Effective water treatment is best value guaranteed

Most of  the domestic gas boilers installed in Ireland come from England

Part L

In England Government Enforces the Use of Chemical Cleaning and Chemical Inhibitors on Boiler Change.

In May 2006, the Government released the Domestic Heating Compliance Guide.  This leaflet provides guidance on how to meet the requirements of Part L of the Building Regulations for England and Wales. 

The Compliance Guide details the steps necessary to comply with Part L for both new or replacement central heating systems in domestic households.  The guidance sensibly draws on industry approved practices and allows the boiler manufacturers to have a say in which products are compatible with each boiler.

Gas-fired Central Heating Systems

For gas-fired central heating systems the Compliance Guide specifies that, the boiler should have a
minimum efficiency of 86% as defined by it’s SEDBUK value1 ; and minimum provisions must be met for
· System circulation
· Hot water storage
· Pipework insulation and specific controls must be installed.

Minimum provisions for system preparation and water treatment must be met.

What are the minimum provisions for system preparation and water treatment?

Central heating systems must be thoroughly cleaned
and flushed out before installing a new boiler.

There is a difference between cleaning and flushing. 
Cleaning involves the use of a cleaning chemical, such as Fernox 500ml or Superconcentrate Cleaner or Heavy Duty Restorer. 
Flushing uses the force of mains water to remove any residues or debris still circulating the system after a cleaner has been used.

During the final filling of the system, a chemical water treatment inhibitor should be added to the heating system to protect against corrosion, scale and sludge.  It is recommended to follow the guidance on how to prepare and commission systems detailed in BS7593.

BS7593 is the recognised code of practice for cleaning and inhibiting central heating systems.  Re-issued in 2006, it recommends the use of power flushing as the most efficient method of cleaning existing systems to restore the energy efficiency of the overall system.

The compliance guide specifies chemical water treatment, because, unlike physical water treatment devices, the effectiveness of a chemical can be easily proven. It also recognises that not all water treatment products are the same.

In order to comply with Part L, a chemical inhibitor, which prevents both corrosion and scale, should be used.    Many products available today are not formulated for scale prevention. The Fernox Protector range is an example of corrosion inhibitors that offer very good scale control.

Installers should refer to the boiler manufacturer’s installation instructions for appropriate water treatment products and special requirements for individual boiler models.

This allows the boiler manufacturer to recommend products used within their boilers.  Boiler manufacturers and partners have undertaken extensive test trials to ensure that the chemical cleaners and inhibitors are formulated to meet the individual needs of the boiler.

Where the mains water hardness exceeds 200 parts per million, feed water to water heaters and the hot water circuit of combination boilers should be chemically treated to reduce the rate of accumulation of limescale.

Water hardness is measured by the amount of calcium carbonate it contains.  In areas where the supply of water is particularly hard, the calcium carbonate can contribute to the formation of limescale.  Limescale deposits are more common where a great deal of heat is generated, such as in heat exchangers. 

One of the most effective methods of treating water to reduce the formation of limescale is to install a device that proportionally doses food-grade polyphosphate into the water, such as the Fernox Scale Preventer - Quantomat.

1 In existing dwellings, in some exceptional circumstances a more lenient measure may be applied.