Honeywell Heat Meters

Honeywell heat meters are ultrasonic energy meters made by Resideo (Honeywell Home). They measure the heating energy used by flats or buildings and provide the data for consumption-based heat cost allocation. This page lists the threaded EW700 series, the flanged EW7731 series and EW5001 calculators that work with external flow sensors.

The most common size in flats is DN20; EW700 covers DN20–DN40 and EW7731 covers DN50–DN100.

How to choose a Honeywell heat meter

Consider pipe size, nominal flow, reading method and installation point. EW700 is installed in the return pipe and read via wired M-Bus and an optical interface. For large pipes or special flow sensors, a separate calculator (EW5001) is used.

See all brands in heat meters and DN20 ultrasonic heat meters. Popular items: the EW700 DN20 and the EW7731 DN50 flanged meter. Learn the basics in what is a heat meter; more on the Honeywell brand page.

All products are original and supplied with an invoice; the warranty is provided by the manufacturer or importer. The current price is shown on each product card: the VAT-inclusive price first, the VAT-exclusive price below it.

Frequently asked questions

Which sizes does EW700 come in?

DN15, DN20, DN25, DN32 and DN40. Flats mostly use DN20, with 2.5 m³/h nominal flow and 130 mm length.

Can Honeywell heat meters be read remotely?

Yes. EW700 has wired M-Bus and an IrDA optical interface; EW7731 also communicates via M-Bus. For re-verification see our heat meter calibration page.

Prepared by the Novus Mühendislik ve Enerji Sistemleri technical team · Updated: November 2026