Delta 60 Conversion Factors

Most modern systems run at Delta 60

ie the temperature into the radiator is 80 and the desired room temperature is 20


80 minus 20 = 60  that is why we quote at Delta 60



A recent customer had a situation where is temperature into the radiator was 75 and he wanted his room to be 20

so he needed Delta 55 figures

as shown below - he needed to up his radiators by a factor of 1.11

ie if the requirement would of been for 10 sections of radiator in a normal situation then he needed to go upto 11 sections of radiator - this would ensure he ended up with the room temperature of 20

If you need any more help on this matter then please call Viv, Dan or Becky




•Delta T = 55°: x 1.11


•Delta T = 50°: x 1.28

•Delta T = 45°: x 1.43

•Delta T = 40°: x 1.67

•Delta T = 35°: x 1.95

•Delta T = 30°: x 2.36

•Delta T = 25°: x 2.96

•Delta T = 20°: x 3.91

•Delta T = 15°: x 5.6