Heat metering, how it works

Heat metering, how it works

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Heat metering, how it worksthe system that calculates and divides the consumption recorded in the individual housing units.

There heat accounting, combined with thermoregulation elements, allows you to automatically manage the temperature in each real estate unit, dividing the costs according to individual actual consumption.

There are several systems ofheat accountingwith particular types ofoperation. On this page we will analyze the need for the use of "heat counters"In the condominium area to pursue energy saving. A lot of information on legal obligations (who has to install the heat metering systems, thermostatic valves, how much is the cost, who has to bear the costs ...) are contained in the pageHeat metering for condominiums“. On this page we will focus onoperationof the system heat accounting.

Metering of heat, how it works in condominiums

For some time, the adoption of devices for the heat accounting it has become mandatory for condominiums. The obligation to adopt devices for the heat accounting so as to ensure the correct division of heating costs, it arises from a series of considerations on condominium life. It has been observed that, without a rational division of the costs related to heating, the inhabitants of the condominium tend to waste a high load of thermal energy.

Compared to the standard central heating system, the adoption ofheat accountingallow you to save 25% of energy. Heat metering systems, in the condominium area, are a legal obligation.

As stated, there is no single system ofheat accountingtherefore it is difficult to summarize theoperation. The heat metering mechanism depends on the type of system installed in the condominium.

If the condominium was built in the 90s, there is a "horizontal distribution" which involves the use ofdirect accounting. On the contrary, the old building condominiums (up to the end of the 1980s), provide for column systems or "vertical distribution" and require a system of indirect accounting.

The direct heat metering systems provide meters that measure the energy at the entrance to the distribution plant branch of each real estate unit; in other words, the "counts "the thermal energy withdrawn voluntarily through the systemsthermoregulation.

Old buildings do not have an individual "branch entry" for each housing unit, so it is necessary to adopt a system ofindirect heat accounting, that is, which reads the amount of energy emitted by each heating body. In this case theoperationit is more complex because the heat consumed is not directly measured as with idirect heat metering systemsinstead, a consumption index proportional to the heat input is measured. The heat divider is a device that measures the thermal emission of each heating body, returning a dimensionless value, that is, it does not correspond to the absorbed kWh. The reading of the recorded data can take place with direct access to the devices or with remote solutions that provide for the transmission of the data detected with periodic readings every two months, every six months ... or at a frequency chosen by the manager of the condominium.

In any case, for correct operation, a heat metering system requires a consumption divider (whether direct or indirect) and thermostatic valves.

While theconsumption dividerjust readsthe actual heat emitted by the radiator(so the condominium will only have to pay for his actual consumption), the thermostatic valves tend to regulate the room temperature efficiently.

Theoperationit's simple: as a room starts to heat up, the thermostatic valve will start to close, decreasing the amount of energy absorbed by that particular radiator. In this way, theconsumption dividerwill record a drop in consumption.

Video: Whats inside a Thermal Expansion Valve TXV - how it works hvac (July 2022).


  1. Gianni

    I am final, I am sorry, but it is necessary for me little bit more information.

  2. Yesuto

    Another variant is possible

  3. Ryan

    I heard something like that, but not in such detail, but where did you get the material from?

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