Ideal Heating EVOMAX 2 Series, Product & Flue Manual

Page: 24 / 29

47 idealheating.com
46 welcome to our ideology
TERMINATION POSITIONS APPLIANCES OVER 70KW NET INPUT
SEE IGEM 10 FOR FURTHER DETAILS
1, 3 & 6 Minimum Height of Termination Located on a roof
70kW 80kW 100kW 120kW 150kW 200kW 240kW 300kW
Natural Draught 600mm 615mm 645mm 676mm 722mm 798mm 859mm 950mm
For other natural draught appliances use Distance = 1.5225 (net heat input kW) + 493.43
Fanned Draught
300mm 327mm 380mm 433mm 513mm 646mm 753mm 913mm
For other fan draught appliances use Distance = 2.6644 (net heat input kW) +113.49
For all sloped roofs over 20 degree pitch the terminal must be 1.5m away
If the flue termination is within 2.5m of an adjacent structure then these heights above the structure will apply
2 Minimum Horizontal Termination To Openings Into Buildings (side or above)
70kW 80kW 100kW 120kW 150kW 200kW 240kW 300kW
Open Flue and
Fanned Draught
1500mm 1600mm 1790mm 1975mm 2265mm 2740mm 3120mm 3690mm
For other open flue fan draught inputs use Distance = 9.5156 x (net heat input) + 833.91
Room Sealed
Fanned Draught
600mm 675mm 820mm 960mm 1180mm 1540mm 1830mm 2265mm
For other room sealed fan draught inputs use Distance = 7.232 x (net heat input) + 93.708
The minimum distance below in all cases is 2500mm
10 Room Sealed Fanned Draught Minimum Horizontal Termination To Opposing Walls/Terminals
70kW 80kW 100kW 120kW 150kW 200kW 240kW 300kW
Opposing Flat
Surface
1000mm 1231mm 1694mm 2156mm 2850mm 4006mm 4931mm 6319mm
For other inputs use Distance = 23.126 x (net heat input) – 618.84
Opposing Terminal
600mm 675mm 820mm 960mm 1180mm 1540mm 1830mm 2265mm
For other inputs use Distance = 19.32 x (net heat input) + 647.59
.
*4
*2
*2
*2
*9
*2
*5
*9
*1
*1
*1
*1
*1
*7
*7
*7
*9
*8
*8
*3
*3
*6
*10
.
*4
*2
*2
*2
*9
*2
*5
*9
*1
*1
*1
*1
*1
*7
*7
*7
*9
*8
*8
*3
*3
*6
*10
WHEN SHOULD I USE COMMERCIAL FLUE
REQUIREMENT LEGISLATION AND GUIDANCE?
BS5440 covers domestic installations up to 70kW net input, however if an appliance is to be installed in a factory
location even if under 70kW then the commercial requirements of IGEM UP10 & BS6644 must be adopted.
Similarly if a cascade boiler installation is fitted and the total input exceeds 70kW then the commercial flues and
ventilation should be adopted.
WHAT IS GUIDANCE AND WHAT IS MANDATORY?
British Standards are a mandatory requirement. The approved documents offer guidance on how to comply and
are not legally binding unless the manufacturer of the appliance stipulates them in the installation manual. It is
prudent however to follow them because they would likely be used in a court of law as the minimum expected by
a competent person to install a safe system.
Building Regs are a mandatory requirement as set out in Government legislation.
IGEM Documents offer guidance in the same way as British standards. However these have been set and adopted
by
a board of industry experts and represent current best practice and are aligned with National/International
legislation and standards.
Clean Air Act – This is a mandatory requirement as set out in Government legislation.
Gas Safety (Installation and Use) Regulations 1998 – These are mandatory and set out the requirements for
safe installations.
CLEAN AIR ACT - THE FACTS
The Act applies to gas (and other fuels) fired appliance installations generally but with specific requirements
for installations exceeding 333 kW net heat input including approval of the height of the chimney by the Local
Authority. The essential requirements are that flue discharges are not to cause a nuisance to others or be a hazard
to health.
In 1956 there was a clean air act memorandum that stated appliances with gross input of 150kW must terminate
vertically. This has no foundation in law and was not written for modern high efficiency products. To this effect the
current guidance suggests that all installations from 135kW net input that wish to terminate horizontally should
be subject to a risk assessment which can be found in IGEM UP10.
All installations are subject to the clean air act requirements:-
Installations below 333kW net heat input can terminate horizontally at low level subject to a risk assessment and
complying with all other clearance distances as defined in IGEM UP10.
• Appliance inputs greater than 333kW net need prior approval from the Local Authority with position of flue
termination agreed by them.
• No terminal fitted to natural draught flues should be less than 170mm.
• Terminal positions for fanned or natural draught flues shall be clear of obstructions and openings into buildings.
Wall terminations shall be directed away from the building.
• Vertical outlets must be the minimum required above the roof level.
• Any horizontal outlet below 2m must be guarded and a minimum of 300mm above ground level.