Conventional draft cut boilers – type B1 – have been replace by “low NOx” B1s since September 26, 2018.
Everyone is familiar with the European directive 2009/125/EC, also known as the ErP directive for Energy-relate Products or the Eco design directive. With regard to heating and domestic hot water (DHW) production generators, it imposes a timetable for improving efficiency, Boiler Repair Services in West Midlands reducing operating noise and, for combustion appliances, improving the quality of smoke .
Efficiency and quality of combustion products
For gas boilers, regulation 813/2013, which sets the eco-design directive to music, requires from September 26, 2018. A seasonal heating efficiency ≥ 75% for type B1 boilers and a NO2 rate ≤ 56 mg/kWh PCS regardless. The type of wall-mount gas boiler these two criteria mean that conventional B1 boilers. Define as “a device for heating premises by fuel-fired boiler comprising. A backdraught draft hood, intended to be connected to a natural draft duct evacuating the combustion. Residues outside the room where the heating device is installed, and which takes. The combustion air directly from this room” – can no longer be placed on the market since 26 September. Wholesalers and installers, however, have the right to dispose of their stocks.
What’s the problem ?
About 2 million classic B1 boilers are install in France, of which, according to Poujoulat, about 1 million are connected to individual masonry ducts and one million to collective ducts such as the gas technical cell, the gas VMC, the Shunt duct or the leads Alsace. The problem is simple: what to do in case of replacement of these old boilers? Conventional B1 boilers have a flue gas temperature of around 130 to 160°C, compared to 60 to 120°C for “low temperature” type B or C boilers and 35 to 80°C for condensing boilers of type B or C. C meaning sealed boiler. The new B1 low temperature and low NOx boilers and type B or C condensing boilers offered by manufacturers meet the requirements threshold of September 26, 2018 of the Ecodesign directive,
On individual flue, no boiler B1
Indeed, as recall by Synasav (national union for maintenance and energy efficiency services). The decree of March 22, 2017, modifying the decree of May 3, 2007. Relating to the thermal characteristics and energy performance. Of existing buildings, prohibits B1 boilers, even compliant with the directive. In individual connection of less than 10 m. In height since January 1, 2018, Boiler Repair Services in West Midlands regardless of the type of duct. Masonry, VMC gas, etc. So, to replace a type B1 boiler on an individual duct, two solutions exist.
- If it’s Chinese, it’s normal.
- A fan upstream (B22) or downstream (B23) of the combustion chamber and evacuation of the combustion products to the outside via a single-wall pipe under depression.
- The B22p and B23p configurations have a pressurize exhaust duct.
- But with a fan upstream (B22) or downstream (B23) of the combustion chamber and evacuation of the combustion products to the outside by a single-wall conduit in depression.
- The B22p and B23p configurations have a pressurize exhaust duct. but with a fan upstream (B22) or downstream (B23) of the combustion chamber and evacuation of the combustion products.
- To the outside by a single-wall conduit in depression.
- The B22p and B23p configurations have a pressurize exhaust duct.
The suction cup is easier
The second solution is the abandonment of the individual flue and the installation of a sealed condensing boiler with a suction cup. All configurations of seal boilers on individual ducts are possible. The most common are C12 or C13: concentric tube with horizontal outlet, Boiler Repair Services in West Midlands the classic suction cup. C33 combines concentric air supply and smoke evacuation ducts with a vertical terminal on the roof. Rarer, C5 provides two separate ducts. The first duct ensures the air intake between the boiler and the outside.
- The second handles the evacuation of combustion products outside the building.
- The exit of the burnt gases is most often carrie out on the roof, but can also cross the wall horizontally.
- The C93 configuration consists of the reuse of an existing masonry valve: Boiler Repair Services in West Midlands a tube introduce into the valve ensures the evacuation of smoke.
- The annular space between this tube and the internal wall of the valve brings the combustion air.
- Apart from C12 and C13, the other configurations B and C are subject to technical advice.
- Boiler manufacturers indicate which configurations can be associate with their generators.
Two collective solutions
To change a classic B1 boiler connect to a collective flue, there are also two solutions. The first is to replace the collective flue and all the boilers connect to them all at once. There are many collective duct solutions – 3CE, etc. – under Technical advice, suitable for condensing boilers. However, Best Home Appliance Repair Company in Leicester this maneuver must be planned and studied well in advance.
It is completely impractical when it is necessary to replace a single B1 boiler that has broken down in an apartment building: it would take weeks of delay in a building belonging to a single owner and months to convince a joint ownership. During this time, a dwelling would remain without heating or hot water. The second method is necessary:
Quantities of new B1 boilers
Face with the September 26 deadline, French manufacturers have prepare and are offering many models of new B1 boilers, in line with the deadline. Models intended for connection to VMC gas must be associate with a specific extraction vent. Aldès has develop the BAZ Pilot exhaust valve for this purpose. Frisquet offers the Hydromotrix Tradition Visio boiler, a 23 kW mix wall-mount boiler only 407 mm wide, whose flue gas temperature never drops below 110°C. It has a seasonal efficiency > 75%, which even rises to 78% if the boiler is associate with Ecoradiosystem Visio wireless regulation.
It may not be over
Among the French manufacturers, only Vergne Innovation does not launch into low NOX and focuses on condensation. This is not necessarily a bad strategy. Indeed, Boiler Repair Services in West Midlands European Regulation 813/2013 provides for its own review. This is underway and could be complet by the end of 2018 or the beginning of 2019.
If by chance a new version of regulation 8013/2013 adds new deadlines for improving yields. Low temperature boilers could also disappear from the European market in the long term.
