Purewell Variheat mk2 condensing cast iron boiler
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.
Product information
- 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.
Technical data
| Units | PV70c | |
|---|---|---|
| Energy | ||
| Building regulations - seasonal efficiency | (%) gross | 95.3 |
| ErP efficiency rating (modules ≤ 70 kW only) | A | |
| Boiler output (non-condensing) mean 70°C - max | kW | 63.5 |
| Boiler output (non-condensing) mean 70°C - min | kW | 21.2 |
| Boiler output (condensing) mean 40°C - max | kW | 70 |
| Boiler output (condensing) mean 40°C - min | kW | 23.3 |
| Gross boiler input - max | kW | 72.2 |
| Gross boiler input - min | kW | 24.1 |
| Net boiler input - max | kW | 65 |
| Net boiler input - min | kW | 21.7 |
| Water | ||
| Water content | litres | 8 |
| System design flow rate @ 20°C ∆T rise | l/s | 0.8 |
| Water side pressure loss @ 20°C ∆T rise | mbar | 32 |
| System design flow rate @ 11°C ∆T rise | l/s | 1.5 |
| Water side pressure loss @ 11°C ∆T rise | mbar | 96 |
| Maximum water pressure | bar g | 6 |
| Gas | ||
| Gas flow rate natural gas (G20) - max | m3/hr | 6.9 |
| Nominal inlet pressure natural gas (G20) - max | mbar | 20 |
| Maximum gas inlet pressure natural gas (G20) | mbar | 25 |
| Flue | ||
| Flue Gas Flow Rate@ 15°C, 9.5% CO2 | m3/hr | 86 |
| Approx. flue gas temperature @ 50/30°C | °C | 40 |
| Approx. flue gas temperature @ 80/60°C | °C | 60 |
| Pressure at boiler flue spigot @full load | Pa | 100 |
| Dry NOx emission* | mg/kWh | 21.3 |
| Connection | ||
| Water flow/return connections | inches | R2” |
| Gas inlet connection pipe thread size | inches | R1” |
| Nominal flue diameter (I/D) | mm | 150 |
| Electrics | ||
| Electrical supply | 230 V 1 Ph 50 Hz | |
| Power consumption @ max | W | 94 |
| IEC power outlet power consumption @ max | W | 460 |
| Start current and run current | Amp | 0.54 |
| Approx shipping weight | kg | 195 |
| Noise emission @1 m and @maximum boiler modulation | Max dB (A) | 53 |
| CO2 (±0.25%) - max | % | 9.5 |
| CO2 (±0.25%) - min | % | 9.5 |
| *0% excess oxygen, dry air free, European Class 6 |
Downloads
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Purewell Variheat mk2 boiler brochureProduct brochures 6226 kb |
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AGU 2.550 Expansion Kit Wiring InstructionsInstallers guides 2245 kb |
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LPB Expansion Kit InstructionsInstallers guides 2358 kb |
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Purewell Variheat mk2 Installers GuideInstallers guides 10411 kb |
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Purewell Variheat mk2 pipework kits installation manualInstallers guides 2546 kb |
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QAA74 - Technical ManualInstallers guides 1640 kb |
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QAA74 Quick Reference GuideInstallers guides 178 kb |
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Purewell Variheat mk2 boiler hydraulic schemesHydraulic schematics 353 kb |
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Purewell Variheat mk2 boiler 2D layout for 2 boilers CADCAD 3271 kb |
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Purewell Variheat mk2 boiler 2D layout for 3 boilers CADCAD 4829 kb |
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Purewell Variheat mk2 boiler 2D layout for 4 boilers CADCAD 6324 kb |
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FAQ
Ideal uses/applications
- Easy fit replacement for refurbishment projects.
- Medium sized commercial and public buildings including schools, care homes, hotels, churches and retail units.
- Smaller commercial and public buildings including community schools, care homes, hotels, churches and retail units.
- Locations with substantial and continuous heating load including hospitals, care homes and hotels.
- Ideal replacement for atmospheric boilers.
Optional extras
Reverse return header kit available for:
- 2 boiler installation
- 3 boiler installation
- 4 boiler installation ( 2 x 2 boiler installation kit)
- Flues available
- Choose from a wide range of service contracts to help maintain optimum performance.
- Book commissioning at the same time as placing your order for improved warranty terms.
Often bought with
Case studies
Allenbourn Middle School, Wimborne
Sector: Education
Project: The school suffered from ageing boilers that had already broken down. Spare parts were impossible to source, so the boiler plant was upgraded to cast iron condensing boilers.
Building: School refurbishment
Application: Space heating 285kW
Learn more