Specifications & Sizing

The following POWERflow sizing guide is designed to act as a quick reference. However we would recommend that you contact our technical sales team who can discuss your project in more detail and provide the right size and specification for your requirements. 

POWERflow Sizing Guide
Installation Indirect Direct
1 Bedroom + Bath/Shower 75/120 120/150
2 Bedroom + Bath/Shower 150 180
3 Bedroom + 2 Baths/Shower 180 210
4 Bedroom + 2 Baths/Shower 210/250 250/300

Larger Properties

300+ 300+

If you are planning on incorporating solar energy, we would normally recommend you step up to the next size, however please contact our technical sales team on 01592 611123 to discuss your requirements.

POWERflow Technical Data

    75 litre 120 litre 150 litre 180 litre 210 litre 250 litre 300 litre
Energy Efficiency Class Indirect B C C C C C C
Energy Efficiency Class Direct C C C C C C C
Heat Loss Watts 43 54 64 66 71 75 81
Height mm 950 950 1150 1350 1550 1550 1850
Overall Diameter mm 450 550 550 550 550 600 600
Weight (empty) kg 26 37 44 55 61 70 86
Weight (full) kg 101 157 194 235 271 320 386
Pressure Regulator bar 2.1 2.1 2.1 2.1 2.1 2.1 2.1
Expansion Vessel litres 8 12 12 18 18 24 24
Primary Coil kW 13 21 26 31 67 44 52
Heat Up Time (indirect only) min 20 20 20 20 20 20 20

 

  1. Explanation of POWERflow unvented mains pressure cylinderIsolating Valve
  2. Pressure Reducing Valve
  3. Balanced Cold Outlet
  4. Check Valve
  5. Cold Feed
  6. Immersion Heater
  7. Immersion Heater (only standard on 150 litre Direct upward)
  8. Expansion Relief Valve
  9. Pressure & Temperature Relief Valve
  10. 15x22mm Visible Discharge Tundish
  11. To waste in 22mm
  12. Hot Draw Off
  13. Expansion Vessel
  14. Drain Cock

POWERflow Indirect Hot Water Cylinder

  1. Primary Flow
  2. Primary Return
  3. Thermostat c/w Non Self Resetting Thermal Cut-out
  4. 2 Port Motorised Zone Valve

Call us now on 01592 611123 or contact us now.

POWERflow OPTIONS

  • Specially manufactured cylinders to fit awkward spaces
  • Units suitable for Solar input
  • Cased White Goods finish
  • Super Fast Recovery Finned Coils
  • Larger Diameter Valves
  • 28mm Coil Connections (for Gravity)
  • Secondary Return

Call our Technical Helpline (01592 611123) with any queries on the POWERflow mains pressure cylinder range. We are happy to help size units, detail specifications and answer any questions you have on the units.

POWERflow Unvented mains pressure cylinders from McDonald Engineers.