“We are developing the energy-saving product range of TESY with control via Internet”

Conversation with eng. Kostadin Borisov, Head of “Standards and Quality Management” Department, TESY


Eng. Borisov, would you tell us more about the department under your control?

I manage the “Standards and Quality Management” Department, which is organized in two sections – Testing and Research Laboratory and Quality Control. The activities carried out in the Quality Control section are associated with the checking of the supplied components and materials, the control of the parameters and semi-manufactured products in the manufacturing process and the conformity checking of the manufactured appliances.

We are also following the changes in the European and the national legislation in relation to the appliances that we manufacture, the changes in the European and the global standards. We take part in various technical committees specialized in the standardization on the European level and I will only mention one of them –  TC59x to CENELEC, features of household appliances.


Would you present certain elements of the new European Union Regulation regarding the eco design requirements for local space heaters?

The Regulation on the local space heaters covers a very broad range of appliances. I will pay special attention to the electric appliances manufactured by TESY, such as convectors and oil-filled radiators. First, I would like to point out that, in practice, appliances without an automatic control – thermostat – cannot meet the minimum requirements and cannot be marketed in the EU. As far as the portable appliances, for example an oil-filled radiator, the lowest required level is to be supplied with a mechanic thermostat for temperature control. On the contrary, the fixed ones, such as wall-mounted convectors, shall compulsorily be controlled by an electronic thermoregulator with a function for weekly programming of the operation and at least one of the following additional functions – open window, and/or adaptive start, and/or control via internet. The energy efficiency of a specific type of appliances is calculated based on the type and the number of the built-in functions, pursuant to a methodology provided for in the Regulation, and then it is determined whether it meets the requirements. The regulations do not require the affixing of a special energy-efficiency label, however, in the mounting and operation instructions specific information related to the functionalities has to be given.


Which of the TESY’s products comply with the latest energy-efficiency regulations?

All appliances that are marketed by TESY on the territory of the European Union, comply with the requirements of the energy-efficiency regulations. These are convectors, oil-filled radiators, indirectly heated storage tanks, electric water heaters, instantaneous water heaters. The appliances that are intended for other markets comply with the local regulations and requirements, and quite often they practically, partially or wholly, coincide with the requirements of the European regulations.


Would you like to tell us more about other innovative projects?

These are projects related to the products with built-in electronic control equipped with a Smart function or the so-called intelligent regulator, which automatically adapts the appliance operation process to the individual consumption regime. In other words, self-learning control on the basis of the customer’s consumption regime, which subsequently automatically follows these regimes for the purposes of energy saving.


Would you share the directions or the plans for your future development?

Our plans are related to the development of a range of TESY Cloud products, where the direction is to supply all appliances with an option enabling the control via internet. The next stage will consist in their upgrading and being controlled by external systems – for example Alexa of Amazon, Google Assistant, Apple Home and Google Home, IFTTT, etc. The utmost goal is to provide to the consumer constant access for control and energy saving.


Source: “Stroiteli” Magazine