Heat cost allocators
by QUNDIS
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Heat cost allocators
by QUNDIS
QUNDIS is the market leader in the field of heat cost allocators.
At our plant in Erfurt more than 4 million devices are produced and sold on the world market every year.
While heat cost allocators based on the evaporation principle have a measurement tolerance of up to 15 percent, the Q caloric technology (2-sensor models) ensures a maximum deviation of 2 percent.
Our electronic heat cost allocators represent the highest technological standards and offer the largest range of applications worldwide. Thanks to our comprehensive database of heat transfer values (KC values), the Q caloric model can be used on almost any radiator.
Due to the standardisation of the radio telegrams and the readout files, as a measurement service provider you offer your clients (house administrations, owners, etc.) the greatest possible independence (from devices, manufacturers, etc.).
In addition, you can offer tenants a high degree of transparency when measuring consumption, as they can also read the consumption according to the standard and product scale directly on the device themselves.
With single-sensor models, our devices assume a fixed room temperature. Our extremely accurate 2-sensor models can include environmental factors such as solar radiation or hot spells in the billing because they record the room temperature separately. This allows the recording of heat consumption in the home to be even more consumption-based.
Improved wireless transmission performance and flexible readout times
The new Q caloric 5.5 heat cost allocator enables an even simpler and more flexible readout of meters than before. Metering can be implemented both on site and in mobile form. The significantly greater wireless transmission range simplifies remote readout, improves data quality and cuts readout times.
The more flexible readout times are a further productive new feature. This means that metering services and housing companies are no longer tied to specific times of the year. As a result they have more flexibility in planning their recording of consumption data and the billing of energy costs. Meter reading can be implemented both on site and in mobile form, because parallel to walk-by wireless telegrams Q caloric 5.5 also sends AMR telegrams.
The benefits at a glance:
Almost every radiator type on the market is recorded in our comprehensive KC values database. The Q caloric heat cost allocators can therefore be used on practically all radiators.
Our heat cost allocators can be supplied with or without radio and with or without an infrared interface. This allows you to set up the readout processes as you wish.
The Q caloric heat cost allocators can be displayed on a unit or product scale if required. This gives end consumers the opportunity to track their energy consumption very transparently in their bills.
Thanks to the independent readability and a measurement tolerance of maximum 2 percent, QUNDIS heat cost allocators provide very accurate measured values.
Thanks to the standardized radio protocols and file formats, the consumption data can be easily exported and further processed by common billing programs used by metering service providers.
Thanks to the heat cost allocators being equipped with C-mode radio communication, the devices can also be read on the move 365 days a year. You do not need access to the apartment.
Attempts at manipulation are quickly detected.
All benefits
at a glance.
Are you a tenant and have questions about your metering technology or billing? Then please contact your property management company or the responsible metering service.
Heat cost allocators are devices that can be used to determine the relative share of a radiator in total consumption. They are an inexpensive way of allocating heating costs fairly among residents. They have proven themselves millions of times over - and have been used in Germany since the 1920s.
Heat cost allocators are installed directly on the radiator. There they record the temperature difference between the radiator surface and the room temperature. There are two ways of recording measured values, either via electronic heat cost allocators or thermodynamically via heat cost allocators based on the evaporation principle.
A heat cost allocator with a unit scale only displays a value without a unit. The consumption value is only calculated using a formula.
The European standard EN 834 (point 6.3) stipulates that only those mounting points on the radiator may be selected where the average heat dissipation is most effective over a wide temperature range. Depending on the radiator type, the fixing location, fixing height and type of fixing are therefore precisely specified.
As a rule, the heat cost allocator must be installed at 75 percent of the radiator height for both evaporative and electronic heat cost allocators. Nevertheless, the optimum installation points for radiators with a similar appearance can differ considerably in some cases. Only a specialist can therefore make a correct assessment.
This is how our Q caloric 5.5 heat cost allocator is installed:
All heat cost allocators used in Germany must be tested and approved in accordance with § 5 of the Heating Cost Ordinance (HKVO). The technical basis for this is set out in the European standard EN 834 for electronic heat cost allocators.
Electronic heat cost allocators measure the heat emitted by a radiator much more accurately than evaporators. This is because electronic heat metering also takes the room temperature into account. Our Q caloric heat cost allocator is programmed in such a way that it can distinguish very accurately between “real” radiator heat and other heat sources, e.g. solar radiation. Thanks to the very high temperature sensitivity, measurement errors are greatly minimized with this technology.
With evaporators, unwanted external influences such as humidity or solar radiation affect the measurement. This leads to inaccuracies of up to -/+ 15 percent in the measurement.
A further advantage of electronic heat cost allocators is that, unlike evaporators, they measure to the exact date and can display various types of values. These include the annual consumption value on any reference date and the current consumption. The display can also be compared directly with the annual bill.
Heat cost allocators only count when the temperature of the radiator is higher than the room temperature.
In the case of the unit scale each heat cost allocator is programmed with the same K-values. When the bill is drawn up the displayed value is multiplied by the evaluation factors of the radiator, which are also calculated. The valuation factor depends on the heating output of the radiator, the type of radiator and type of assembly, details of which are printed on the bill. The total of the calculated values appear on the bill as a consumption unit. In the case of the product scale each heat cost allocator is already programmed with the K value for the radiator. The values displayed on the bill are the same as the values on the heat cost allocator.
For larger radiators, it may be necessary to install two heat cost allocators due to unequal heat distribution. In these cases, the heat output of the radiator is assessed half for each heat cost allocator. Heating costs incurred are therefore not paid twice. The aim of the measure is to correctly record the heat output.
In 1-sensor operation a constant value is prescribed for the ambient temperature and only the radiator temperature is measured. In 2-sensor operation the actual difference between the ambient temperature and the radiator temperature is calculated. The measuring value is recorded via one (radiator) or two temperature sensors (radiator and ambient temperature sensor).
In our device we always have the clock on winter time. This means that the set start time is suitable in winter, but one hour too late in summer. Therefore, the start time for the whole year is set one hour earlier. On the other hand, the device transmits one hour longer in summer with the stop time set for winter. Throughout the year we guarantee the start and stop times expected by the meter-reader, whereby one hour earlier in winter and one hour longer in summer.
Then there are the start and stop times and the reserves for watch tolerance of one hour each. This ensures that the device clock does not deviate from the real time by more than one hour in 10 years. By adding this tolerance to start and stop time, it is ensured that the devices transmit within the specified time window between start and stop time, even after 10 years.
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