| Installation of a new gas boiler with energy class "4 stars" or replacement of an existing one of a lower class |
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| Replacement of gas boiler with open combustion chamber and pilot flame with gas boiler with closed chamber and piezoelectric ignition |
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| Use of small systems for combined production of electricity and heat (cogenerators) for household needs |
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| Installation of air / water or water / water heat pump for heating needs of residential buildings |
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| Use of waste heat recovery systems in circulation systems |
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| Energy efficient design with optimization of thermal properties of building materials |
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| Replacement of electric water heater with gas water heater with closed chamber and piezoelectric ignition |
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| Installation of a heat pump boiler with an electric heater for the production of DHW in existing installations |
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| Use of high performance UPS |
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| Installation of thermostatic valve |
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| Installation of photovoltaic solar panels |
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| Installation of sensors for lighting control |
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| Installation of systems for automation and control of heating in residential buildings (systems for automation and control of buildings, bacs), according to the standard UNI EN 15232 |
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| Installation of air / air heat pump in buildings |
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| Installation of aerators and battery limiters |
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| Regulation of solar radiation through glazed walls during summer cooling |
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| Installation of an electronic system for regulating the speed of an induction motor |
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| Installation of electric motors with higher efficiency |
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| Installation of frequency converters (inverters) on electric motors of air compressors |
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| Installation of frequency converters of electric motors in ventilation systems |
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| Installation of air or water cooled refrigeration machines in industry |
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| Installation of a power factor regulator on electric motors |
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| Installation of a compressor for mechanical steam recompression during distillation of solutions |
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| Use of systems for combined production of electricity and heat (cogeneration) in industry |
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| New energy efficient compressors or increase the efficiency of existing ones |
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| Installation of frequency converters (inverters) of electric motors for flow control in pump systems with power over 20 kW |
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| Utilization of waste heat in industrial processes |
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| Use of compressors with external cold air supply |
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| Replacement of non-functioning condensing pots or installation of new ones |
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| Installation of electronic control systems and optimization of compressed air installations |
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| Installation of a burner with a system for recovery of waste heat in industrial furnaces |
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| Increasing the use of electric cars to transport passengers |
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| Use of diesel engines with additional combustion chamber |
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| Installation of low resistance tires on vehicles |
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| Truck tire pressure monitoring: automatic tire pressure monitoring sensors |
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| Use of fuel additives to increase engine efficiency |
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| Use of hybrid passenger cars |
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| Improving the energy efficiency of ventilation systems after installation of high-efficiency fans |
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| Installation of an absorption heat pump with a nominal power higher than 400 kW for heating and hot water production |
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| Replacement of incandescent traffic light lamps with LED lamps |
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Bulgarian
The methodologies are not approved