Honeywell Resideo EW700 DN20 Ultrasonic Heat Meter

Honeywell Resideo EW700 DN20 Ultrasonic Heat Meter

• Honeywell Resideo EW700 ultrasonic heat meter
• Body size DN20 (¾”), nominal flow rate Qn 2.5 m³/h
• Maximum flow rate qs 5 m³/h, minimum flow rate qi 50 l/h
• Body length (L) 130 mm, 1” threaded connection (G1, to ¾” pipework via union fittings)
• Communication: Wired M-Bus and IrDA optical interface
• Application: heating (the calculator unit also records cooling energy in a separate register); installation point: return line
• Temperature sensor: JUMO PT1000, with 1.5 m cable
• MID approval: Germany, accuracy class 2

Honeywell Resideo EW700 Series

The Honeywell Resideo EW700 series is a compact heat meter with ultrasonic flow measurement, designed to measure heating and cooling energy in residential and small commercial buildings.

The meter consists of an electronic calculator unit with an 8-digit LCD, an ultrasonic flow sensor and a PT1000 temperature sensor pair for the flow and return lines. The calculator unit keeps heating and cooling energy in separate registers and displays values in kWh, MWh or GJ. The flow sensor has no moving parts.

Key Features (manufacturer data)

• MID-approved, accuracy class 2 (EN 1434)
• Separate registers for heating and cooling energy
• M-Bus and IrDA interface as standard
• Fully immune to external magnetic fields
• Medium temperature 4–95 °C, working pressure up to 16 bar
• Battery life 10 years
• Horizontal or vertical installation; the installation instructions require a straight pipe run of at least 10×DN upstream and at least 5×DN downstream of the meter
• 1 m fixed cable between the calculator unit and the flow sensor; PT1000 sensor pair with 1.5 m cables

Applications

• Heat consumption metering for apartments and dwelling units
• Centrally heated apartment buildings and residential complexes
• Heat cost allocation and billing
• Offices and small commercial units

Why Honeywell Resideo EW700?

Thanks to its standard M-Bus interface, the Honeywell Resideo EW700 connects directly to existing M-Bus reading systems and records heating and cooling energy separately. MID-approved measurement from a long-established brand such as Honeywell means reliable, auditable records for heat cost allocation.

Installation, Reading and Re-verification

Install the meter in the position and at the mounting point specified in its manual; a strainer upstream of the meter and an isolating valve before and after it (for easy replacement) are recommended. In Türkiye, Novus Energy also provides remote meter reading and heat cost allocation services after installation. Periodic re-verification requirements for heat meters depend on local regulations; see our re-verification and calibration page for details.

Other models in the same size: DN20 heat meters · All products of the brand: Honeywell · What is a heat meter and how do you choose one?