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 Technical Data: Melbury HE boiler Boiler model Unit MHE3800 MHE4500 MHE5400 MHE6300 MHE7400 MHE8600 MHE10000 Energy Building regulation seasonal efficiency gross % 85.46 85.55 85.67 85.63 85.65 85.77 85.99 Boiler output 80/60 °C kW 3800 4500 5400 6300 7400 8600 10000 Boiler input (gross) maximum kW 4594 5440 6507 7575 8888 10296 11920 Boiler input (nett) maximum kW 4139 4902 5863 6825 8008 9276 10740 Boiler output minimum 80/60 °C kW 880 1160 1473 1582 1935 2332 2907 Water Design flow rate @ 20°C ∆ T rise l/s 45.45 53.83 64.59 75.36 88.52 102.87 119.62 Hydraulic resistance @ 20°C ∆ T rise mbar 44 62 89 47 65 45 61 Design flow rate @ 10°C ∆ T rise l/s 90.91 107.66 129.19 150.72 177.03 205.74 239.23 Hydraulic resistance @ 10°C ∆ T rise mbar 176 248 356 188 260 180 244 Water flow rate - minimum l/s No minimum flow rate Operating water pressure - maximum (minimum) barg 6 (1.8) 6 (1.8) 6 (1.8) 6 (2.2) 6 (2.2) 6 (2.2) 6 (2.2) Operating water temperature - maximum °C 90 90 90 90 90 90 90 Water return temperature - minimum °C 60 60 60 60 60 60 60 Gas Gas flow rate natural gas (G20) - maximum m 3 /h 438 518.7 620.4 722.2 847.4 981.6 1136.5 Gas inlet pressure natural gas (G20) - nominal/maximum mbar 60 Data on application Flue Approx. flue gas volume @ 15°C, 9% C0 2 , N.T.P m 3 /h 5503.2 6517.7 7809 9069 10668.2 12328.2 14265.2 Flue gas temperature @80/60 °C °C 198 196 190 185 185 178 169 NO x emission (0% excess oxygen, dry air free) European Class 5 mg/kWh 80-100 80-100 80-100 80-100 80-100 80-100 80-100 Combustion chamber resistance mbar 11.01 10.18 10.91 12.46 14.4 16.03 17.48 Misc. Nominal supply voltage - for boiler 230V 1Ph 50Hz Approx. shipping weight - excluding burner kg 7025 8425 10075 13545 16040 18620 21900 Technical data - 3,800-10,000kWmodels 41 01202 662500 | sales@hamworthy-heating.com | hamworthy-heating.com Boilers Want to improve your industry knowledge? Book a CIBSE-accredited CPD seminar for you and your colleagues today and we’ll even provide the lunch. Courses available include: www.hamworthy-heating.com/cpd Email: marketing@hamworthy-heating.com Tel: 01202 662500 Find out more at: “ Very interesting topic and relevant cost benefit analysis for replacing boilers. ” “ Very good session with lots of very detailed and relevant information. Would highly recommend! ” Best practice heating and hot water plant refurbishment Energy saving in commercial heating and hot water Best practice in domestic hot water (3 modules) New boilers and old heating systems: Hydraulic design - A story of separation

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