© MHG Heating Ltd
MHG Heating Ltd, Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey, KT20 5LR
P:0845 6448802 F:0845 6448803 E:
W: www.mhgheating.co.uk
010617
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5.1 Connection Sizes
Standard Unit Connections
HTG Primary Flow
PN6
DN 40
DN 40
HTG Primary Return
PN6
DN 40
DN 40
Gas
BSP
R1.25”
R1.25”
Flue Connection
DN 160
DN 160
Combustion Air Connection
The combustion air duct must have a
resistance no greater than 100Pa
DN 125
DN 125
Condensate Outlet
Plastic
20mm
20mm
Please note that the condensate disposal system must be installed in Plastic or
Stainless Steel. (Copper is not acceptable)
System Separation Plate Heat Exchanger Unit Connections
HTG Primary Flow
BSP
R1.25”
R1.25”
HTG Primary Return
BSP
R1.25”
R1.25”
Gas
BSP
R1.25”
R1.25”
Flue Connection
DN 160
DN 160
Combustion Air Connection
The combustion air duct must have a
resistance no greater than 100Pa
DN 125
DN 125
Condensate Outlet
Plastic
20mm
20mm