DN20 Mechanical Heat Meters (3/4”)

A DN20 heat meter with a single-jet impeller for apartment installations with manifolds. Its body length and connection thread are the same as those of ultrasonic models of the same size.

Minol Zenner C5 ISF DN20

DN20 corresponds to a 3/4-inch pipe size. The technical table of the mechanical DN20 model on our site, the Minol Zenner C5 ISF DN20, gives a nominal flow rate (Qn) of 2.5 m³/h, a body length of 130 mm, a 1” connection thread, heating as the application and JUMO PT1000 temperature sensors. Communication is selected as wired M-Bus or wireless wM-Bus; hot and cold water meters can be connected to its three pulse inputs. The manufacturer’s C5-ISF data sheet gives accuracy class 3 and a fluid temperature range of 10–90 °C.

Because the body length and connection thread are the same as those of DN20 ultrasonic models, switching to a DN20 ultrasonic heat meter later usually requires no change to the installation. We compare mechanical and ultrasonic meters in a table on our mechanical heat meter page.

Other sizes: DN15 ultrasonic · DN20 ultrasonic · DN25 ultrasonic · DN32 ultrasonic · DN40 ultrasonic · Large diameter (DN50–DN300)

Frequently Asked Questions

How many inches is a DN20 mechanical heat meter?

DN20 corresponds to a 3/4-inch pipe size; the Minol Zenner C5 ISF DN20 has a 1” connection thread and a body length of 130 mm.

Can a DN20 mechanical heat meter be used for cooling?

The Minol Zenner C5 ISF DN20 on our site is listed for heating applications. If you need to meter cooling or heating and cooling, see the DN20 ultrasonic models.