Please note:  The product has been upgraded to the mk2 boiler with new controls and spark ignition.

Please note:  The product has been upgraded to the mk2 boiler. Talk to us to find out about availability.

  Purewell VariHeat boiler models Units PV70c PV95c PV110c PV140c PV180c
Energy Building regulations - seasonal efficiency (%) gross 95.35 95.62 95.89 95.74 94.63
ErP efficiency rating (modules ≤ 70 kW only)   A N/A N/A N/A N/A
Boiler output 80/60°C kW 63.5 86.3 99.8 134.4 172.8
Boiler output 50/30°C kW 70 95 110 140 180
Boiler input (gross) Maximum kW 72.2 98.4 115 151.3 194.6
Boiler input (net) Maximum kW 65 88.6 103.5 136.3 175.2
Boiler output Minimum 80/60°C kW 21.2 28.8 33.3 44.8 57.6
Boiler output Minimum 50/30°C kW 20.3 27.6 31.9 40.6 52.2
Water Water content litres 8 8 8 1 1
System design flow rate @ 20°C ∆T rise l/s 0.8 1.1 1.3 1.7 2.1
Water side pressure loss @ 20°C ∆T rise mbar 32 52 72 134 221
System design flow rate @ 11°C ∆T rise l/s 1.5 2.1 2.4 3 3.9
Water side pressure loss @ 11°C ∆T rise mbar 96 176 244 442 731
Maximum water pressure barg 6 6 6 6 6
Gas Gas flow rate natural gas (G20) - maximum m3/hr 6.88 9.37 10.96 14.42 18.54
Nominal inlet pressure natural gas (G20) - maximum mbar 20 20 20 20 20
Maximum gas inlet pressure natural gas (G20) mbar 25 25 25 25 25
Flue Approx. flue gas volume @ 15°C, 9.3–9.8% CO2 @ N.T.P m3/hr 86.13 117.37 137.16 180.53 232.12
Approx. flue gas temperature @ 50/30°C °C 40 40 45 50 50
Approx. flue gas temperature @ 80/60°C °C 60 60 65 70 75
Pressure at boiler flue spigot @full load Pa 100 100 100 100 100
Dry NOx emission (0% excess oxygen, dry air free) European Class 5 mg/kWh 18.5 57.5 69.2 57 67.1
Connection Water flow/return connections inches R2” R2” R2” R2” R2”
Gas inlet connection pipe thread size inches R1” R1” R1” R1” R1”
Nominal flue diameter (I/D) mm 150 150 150 150 150
Electrics Electrical supply   230V 1Ph 50Hz
Power consumption @maximum boiler modulation W 94.3 94.3 94.3 207 207
Start current Amp 0.54 0.54 0.54 0.6 0.6
Run current Amp 0.41 0.41 0.41 0.9 0.9
Approx shipping weight kg 170 170 170 230 230
Noise emission @1 m and @maximum boiler modulation Max dB (A) 53 53 53 65 65
  Title Type Size