Available in 5 condensing models with outputs (@50/30°C) of 70, 95, 110, 140 and 180 kW.

Recently updated cast iron condensing, fully modulating, pre-mix gas fired commercial boiler.

Efficiency 96 product icon
Fuel NG product icon
Turndown 3 product icon
Warranty 10 heat exchanger product item
BIM objects icon
ErP Part L Compliant product icon

 

 

 

  • Proven reliability with a 10-year heat exchanger warranty
  • NEW built in boiler sequence controls capable of controlling up to 16 boiler modules and hot water circuits
  • Easy  access for servicing with NEW quick to remove front cover hooks 
  • NEW full spark ignitor enables servicing without the need to remove the whole burner
  • NEW Low NOx performance (<40mg/kWh, European Class 6)
  • Non complicated design means the Purewell Variheat mk2 is easy to operate & maintain, saving on time and money
  • Highly efficient offering up to 96% gross seasonal efficiency, reducing carbon emissions and saving the end user money on fuel bills
  • Fully factory tested before delivery
  • Sits on same footprint as many traditional and atmospheric cast iron boilers reducing space concerns
  • Easy access to plant room as the Purewell Variheat mk2 fits through a standard doorway
  • Can be disassembled for plant rooms with difficult access
  • Tolerant of existing heating systems making the Purewell Variheat mk2 the perfect choice when replacing old atmospheric boilers
  • Operates in sealed and open vented heating systems (you can read about the differences of Sealed 'v' Open Vented heating systems here)
  • Suitable for use with LPG Air for installation in the Channel Islands
  • Buy in confidence from a UK manufacturer with decades of commercial heating and hot water expertise
  • Extensive back up and support from our team of experience engineers across the UK
  • BIM objects available to assist in design and management
  • The only cast iron condensing commercial boiler that is compliant with the Energy related Products Directive (ErP) available in the UK.
Purewell Variheat mk2 boiler models Units PV70c PV95c PV110c PV140c PV180c  
Energy Building regulations - seasonal efficiency (%) gross 95.3 95.6 95.8 95.7 94.6  
ErP efficiency rating (modules ≤ 70 kW only) A N/A N/A N/A N/A  
Boiler output (non-condensing) mean 70°C - maximum kW 63.5 86.3 99.8 134.4 172.8  
Boiler output (non-condensing) mean 70°C - minimum kW 21.2 28.8 33.3 44.8 50.3  
Boiler output (condensing) mean 40°C - maximum kW 70 95 110 140 180  
Boiler output (condensing) mean 40°C - minimum kW 23.3 31.67 36.37 46.67 53.0  
Gross boiler input - maximum kW 72.2 98.4 115 151.3 194.6  
Gross boiler input - minimum kW 24.1 26.7 38.3 50.4 56.6  
Net boiler input - maximum kW 65 88.6 103.5 136.3 175.2  
Net boiler input - minimum kW 21.7 29.6 34.5 45.4 51.0  
Water Water content litres 8 8 8 11 11  
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 bar g 6 6 6 6 6  
Gas Gas flow rate natural gas (G20) - maximum m3/hr 6.9 9.4 10.9 14.4 18.5  
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 Flue Gas Flow Rate@ 15°C, 9.5% CO2 m3/hr 86 117 137 180 232  
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 6 mg/kWh 21.3 31.1 39.1 32 37.8  
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 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz  
Power consumption @maximum W 94 94 94 207 207  
IEC power outlet power consumption @ maximum W 460 460 460 460 460  
Start current and run current Amp 0.54 0.54 0.54 0.6 0.6  
Approx shipping weight kg 195 195 195 250 250  
Noise emission @1 m and @maximum boiler modulation Max dB (A) 53 53 53 65 65  
CO2 (±0.25%) - maximum % 9.5 9.5 9.5 9.5 9.5  
CO2 (±0.25%) - minimum % 9.5 9.5 9.5 8.5 8.5  
               
  Title Type Size  
Purewell Variheat mk2 boiler brochure Purewell Variheat mk2 boiler brochure Product brochures 7140 kb Download
Purewell Variheat mk2 dimensions Purewell Variheat mk2 dimensions Dimensions 156 kb Download
Purewell Variheat mk2 technical data table Purewell Variheat mk2 technical data table Data tables 71 kb Download
LPB Expansion Kit Instructions LPB Expansion Kit Instructions Installers guides 2358 kb Download
Purewell Variheat mk2 Installers Guide Purewell Variheat mk2 Installers Guide Installers guides 10411 kb Download
Purewell Variheat mk2 boiler hydraulic schemes Purewell Variheat mk2 boiler hydraulic schemes Hydraulic schematics 353 kb Download
Purewell Variheat mk2 pipe kit details and dimensions Purewell Variheat mk2 pipe kit details and dimensions Hydraulic schematics 482 kb Download
Purewell Variheat mk2 boiler 2D layout for 2 boilers CAD Purewell Variheat mk2 boiler 2D layout for 2 boilers CAD CAD 3271 kb Download
Purewell Variheat mk2 boiler 2D layout for 3 boilers CAD Purewell Variheat mk2 boiler 2D layout for 3 boilers CAD CAD 4829 kb Download
Purewell Variheat mk2 boiler 2D layout for 4 boilers CAD Purewell Variheat mk2 boiler 2D layout for 4 boilers CAD CAD 6324 kb Download
Purewell Variheat mk2 boiler PV110 CAD Purewell Variheat mk2 boiler PV110 CAD CAD 1717 kb Download
Purewell Variheat mk2 boiler PV140 CAD Purewell Variheat mk2 boiler PV140 CAD CAD 1699 kb Download
Purewell Variheat mk2 boiler PV180 CAD Purewell Variheat mk2 boiler PV180 CAD CAD 1699 kb Download
Purewell Variheat mk2 boiler PV70 CAD Purewell Variheat mk2 boiler PV70 CAD CAD 1717 kb Download
Purewell Variheat mk2 boiler PV95 CAD Purewell Variheat mk2 boiler PV95 CAD CAD 1717 kb Download
AGU 2.550 Expansion Kit Wiring Instructions AGU 2.550 Expansion Kit Wiring Instructions 2245 kb Download
Purewell Variheat mk2 AGU 2.550 expansion kit wiring instructions Purewell Variheat mk2 AGU 2.550 expansion kit wiring instructions Installatievoorschriften 2245 kb Download

Reverse return header kit available for:

  • 2 boiler installation
  • 3 boiler installation
  • 4 boiler installation ( 2 x 2 boiler installation kit)

Flues available through our flue partner Midtherm Engineering