THERMflow specifications
 
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For specification choose the type of UNIT then the appropriate MODEL.

Combination Unit - Use in new-build situations or where no remote primary feed &
expansion tank exists. Primary Feed and Expansion Tank must be 500mm above top of radiators.
OR
Cylinder Unit - Use when there is an existing remote primary feed & expansion tank. Working head of system must be given when specifying/pricing.
AND
Boiler Model: Use when space heating and hot water are required. Suitable for oil, gas and certain solid fuel boilers. Specify if boiler is Vented or Sealed System.
OR
Electric Model: Use when no space heating is required. Supplied with twin immersions to take advantage of low cost tariffs.
e.g. a location with no loft space and a gas boiler would need a Combination-type, boiler model.

SIZING GUIDE:

Cylinder Reference

Boiler Model

Electric Model

THERMflow 120

1/2 bedroom. Bath or Shower Boiler sizing requirements: Allow 4kW for Hot Water

1 bedroom.
Shower Only

THERMflow 140

2/3 bedroom. Bath or Shower Boiler sizing requirements: Allow 5kW for Hot Water

1/2 bedroom.
Shower Only

THERMflow 180

3/4 bedroom. Bath or Shower Boiler sizing requirements: Allow 6kW for Hot Water

1/2 bedroom
 Bath or Shower

THERMflow 210

4/5 bedroom. Bath or Shower Boiler sizing requirements: Allow 7kW for Hot Water

2/3 bedroom
 Bath or Shower



Supplied as standard with all THERMflow units: * - applies to Combination Units only.

Options:
Sizes:-

Cylinder Reference

Combination Units
(mm)

Cylinder Units
(mm)

 

Height

Diameter

Height

Diameter

120

1130

550

900

550

140

1250

550

1050

550

180

1500

550

1350

550

210

1700

550

1500

550

250
1700
600
1500
600
300
2050
600
1800
600

Other Sizes and Larger Units available on request.
 

Uncomplicated Quality and Value
Copper Cylinder Manufacturers

Powerflow 2000 Unvented Cylinder
Thermflow Thermal Store
Heat Pump Cylinders
Open Vented Hot Water Cylinders
Wet Electric System - Electraflow
Calorifiers
Marine Calorifiers
Plateflow Hot Water Cylinder
Renewable How Water Cylinders
Timesaver Plumbing Unit
Feed and Expansion Tanks
Buffer Vessels
Rectangular Tanks
Stainless Steel Cyliners
Fastheat
Backboilers
Spares for Hot Water Cylinders

Hot Water Cylinders Helpline from McDonald Engineers

Hot Water Cylinder Standards from McDonald Engineers