The HYDROCAL-M4 is a compact heat and BTU meter designed to measure the thermal energy used for heating and cooling systems connected to centralized networks. It accurately calculates the energy consumption of individual apartments, commercial units, or industrial users. By measuring the temperature difference (ΔT) between the supply and return flow together with the volume of thermal fluid consumed, the meter calculates the precise amount of energy used by each utility. Key Features Accurate heat and cooling energy measurement for district and centralized systems Compact design suitable for residential, commercial, and industrial installations Precise calculation of thermal energy consumption using flow and temperature difference data Reliable monitoring of heating and cooling usage for individual billing and energy management Compliance MID 2014/32/EU MI004 approved Compliant with EN 1434 heat meter standard Ideal for district heating networks, apartment buildings, commercial properties, and centralized heating or cooling systems requiring accurate energy measurement and billing.