Technical data

6
Technical Data he Models
Purewell VariHeat High Efficiency Non Condensing Boilers
Performance and General Data Information - Natural Gas
Boiler Model PV65he PV85he PV105he PV125he
Energy
Building regulations - seasonal efficiency (%) gross 86.97 87.34 88.10 87.00
Boiler output 82/71°C kW
Btu/hr x 1000
65.0
222
85.0
290
105.0
358
125.0
426
Boiler input - (gross) - maximum kW
Btu/hr x 1000
80.1
273
107.5
367
128.0
437
154.3
526
Boiler input (nett) - maximum kW
Btu/hr x 1000
72.1
246
96.8
330
118.1
403
139.8
477
Boiler output minimum 82/71°C kW
Btu/hr x 1000
21.5
73
30.1
103
33.6
115
39.8
136
Water
Water content litres 6 9
System design flow rate @ 11°C
∆t rise l/s
1.41 1.85 2.28 2.71
Water side pressure loss @ 11°C
∆t rise mbar
50 80 192 270
Minimum flow rate @ 15°C
∆t rise l/s
1.04 1.36 1.67 2.00
Water side pressure loss @ 15°C
∆t mbar
28 47 98 149
Minimum return temperature °C 50
Maximum water pressure barg 7
Gas
Gas flow rate natural gas (G20) m3/hr 7.63 10.24 12.49 14.79
Nominal inlet pressure natural gas (G20) mbar 20
Maximum gas inlet pressure natural gas (G20) mbar 25
Flue
Approx. flue gas volume @ 15°C - 9.3 - 9.8% CO2 @ N.T.P m3/hr 103.00 123.50 156.00 188.00
Approx flue gas temperature @ 82/71°C °C 158 190 146 175
Pressure at flue outlet Pa 100
Connection
Water flow/return connections inches R 2”
Gas inlet connection pipe thread size inches R 1”
Nominal flue diameter (I/D) mm 100
Electrics
Electrical supply 230V 50Hz 1Ph
Power consumption - maximum modulation W 94.3 207
Start current Amp 0.54 0.6
Approx shipping weight kg 205 277
Noise emission @ 1m - maximum modulation MAX dB (A) 53 65