High Quality and Energy-Efficient Heat Pumps
Official Dealer for the Bulgarian Market
KRONOTERM is a European leader in the development of highly efficient and ultra-quiet heat pumps, designed for comfort, savings, and environmental care. With innovative solutions such as ADAPT, VERSI, and ETERA, the company provides sustainable heating and cooling for every home or business.
Choose KRONOTERM – the future of green energy.
GEOTHERMAL HEAT PUMPS
ETERA
The next generation geothermal heat pump
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Highest efficiency in Europe – ETERA achieved a seasonal coefficient of performance (SCOP) of 8.48, around 30% higher than the average in its category — certified by TÜV Rheinland and BAFA.
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Modular design with long lifespan – Built for decades of reliable operation (up to 30 years), with easy maintenance, upgrades, and replacements thanks to standardized modules.
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Fast and efficient installation – An “all-in-one” design that integrates all key components (buffer tank, valves, circulation pump, etc.) inside the unit, minimizing installation time and potential errors.
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Maximum comfort with minimal noise – Operates almost silently: only 30 dB at one meter or 28 dB in “silent” mode. This is achieved with anti-vibration compressor mounting and multi-layer sound insulation.
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Compact and smart – The indoor unit requires just 0.5 m² of space, making it ideal for modern homes or offices. It can be managed remotely via the CLOUD.KRONOTERM app, with automatic weather-based optimization (OptiWeather).
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Suitable for all heating solutions – ETERA is versatile: compatible with radiators, underfloor or wall heating, cooling, and domestic hot water. Perfect for both new constructions and renovated buildings.
Discover the power of the earth – efficient heating and cooling with minimal costs and care for the environment. Customize the solution for your home or business.
Available in Heating Capacity:
10kW - 13kW - 20kW
Power Supply:
~ 230 V; 50 Hz (1F) or 3N ~ 400V, 50Hz (3F)
Water Temperature:
7 - 67 °C
Configuration
The ETERA heat pump is installed in combination with the HYDRO B(A) DHW module or with other heat storage tanks and domestic hot water storage tanks.
The ETERA-C heat pump is installed in combination with selected heat storage tanks and domestic hot water storage tanks.
Sample kit, fully prepared for installation and operation, including heating, cooling, and domestic hot water (DHW).
ETERA M-1 HT / HK UF E
Compact indoor ground/water or water/water heat pump with integrated regulator and key elements of the heating system
Heating Capacity: 13kW
Functions: Heating, Cooling, Preparation of hot sanitary water, Regulation of the heating system, Additional heat source
Heat source: Geothermal energy - ground
SCOP: 5,71
Power Supply: ~ 230 V; 50 Hz (1F)
Sound Pressure (1m): 26 dB [A]
Source Temperature: -10 - 15 °C
Water Temperature: 7 - 67 °C
HYDRO B / 1F 1
Domestic hot water module for ETERA system, with 200 (l) DHW cylinder, hot water safety valve, plate heat exchanger and circulation pump, expansion vessel, without side panels, for connection to ETERA heat pump
KT-2A
Wall-mounted room thermostat (KSM, TT3000) and controller (KSM)
Price from: 16,963.00 €
33,177.00 лв
12,722.00 €
24,883.00 лв
Prices are valid until 31.12.2025
Year-End Offer
Prices include VAT
The set shown represents just one of the many available options. Depending on your needs, we provide a wide range of solutions and combinations for domestic and commercial clients, with options for B2B or B2C sales, commissioning, and both warranty and post-warranty service.
Please contact us for a free, customized offer tailored to your requirements.
Legend:
A ETERA heat pump
B1 HYDRO B DHW module
B2 HYDRO BA DHW module
C KT-2A controller
D Heat storage and DHW storage tank system
E1 Horizontal geothermal collector
E2 Groundwater
E3 Vertical geothermal collector
F Heat pump for cascade installation ETERA-C
G Heating system
H Hot domestic water
AIR-TO-WATER HEAT PUMPS
ADAPT
Qquiet, adaptive, and aesthetic air-to-water heat pump
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Almost silent operation – noise level of only 42 dB, up to 16 times quieter than European Ecodesign requirements.
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Outstanding efficiency (SCOP 5.20) – the IAH™ technology optimizes consumption, ensuring up to 30% additional savings.
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Elegant and adaptive design – available in six variants, seamlessly fitting into any architecture, made from durable and eco-friendly materials.
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Smart control – remote operation via the CLOUD.KRONOTERM app and the OptiWeather system, which automatically adjusts performance according to the weather.
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Fast and easy installation – a compact indoor unit (approx. 0.5 m²) prepared for efficient mounting and connection.
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Recognized achievements – ranked among the most energy-efficient models and awarded in the BAFA listing of over 1,100 heat pumps.
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Proven results – a customer survey showed up to 83% reduction in heating energy costs after a year and a half of use, with a reported SCOP of up to 5.80.
Quiet, intelligent, and elegant – ADAPT provides comfort, savings, and style. Personalize heating and cooling for your home.
Price from: 18,700.00 €
36,574.00 лв
12,492.00 €
24,432.00 лв
Prices are valid until 31.12.2025
Available in Heating Capacity:
10kW - 14kW - 20kW
Power Supply:
~ 230 V; 50 Hz (1F) or 3N ~ 400V, 50Hz (3F)
Water Temperature:
7 - 67 °C
Sample kit, fully prepared for installation and operation, including heating, cooling, and domestic hot water (DHW).
ADAPT 0416-K3 HT / HK 1F N
High-temperature air/water heat pump with adaptable heating power for outdoor installation. Includes: powder coated, zinced, steel plate housing, color NERO (RAL 8019), weather-protected evaporator and fan, acoustically insulated housing, adaptive heat output control.
Heating Capacity: 14,0 kW
Functions: Heating, Cooling, Preparation of hot sanitary water, Additional heat source
Heat source: Air
SCOP: 5,12
Power Supply: ~ 230 V; 50 Hz
Air Temp.: -25 - 40 °C
Sound Pressure (1m): 38 dB [A]
Water Temperature: 7 - 67 °C
HYDRO S2
Indoor wall-mounted hydraulic unit for ADAPT, single-phase connection 1 x C16, three-phase connection 3 x C16, connections 5 x G 5/4" IT
BO_HRS 200
200 l high-performance hot water tanks fo heat pumps
Configuration
ADAPT heat pumps are combined with the HYDRO C2, HYDRO S2 and WR KSM 2 indoor units.
Legend:
A Outdoor unit
B1 HYDRO C2 compact hydraulic indoor unit
B2 HYDRO S2 hydraulic indoor wall unit
B3 WR KSM 2 wall control unit
The set shown represents just one of the many available options. Depending on your needs, we provide a wide range of solutions and combinations for domestic and commercial clients, with options for B2B or B2C sales, commissioning, and both warranty and post-warranty service.
Please contact us for a free, customized offer tailored to your requirements.
Year-End Offer
Prices include VAT
VERSI
Compact, stylish, and intelligent air-to-water heat pump
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Maximum efficiency in minimal space - VERSI is designed for locations with limited space – wherever every centimeter matters. Compact and lightweight, it can be installed in ceilings, under staircases, in niches, on balconies, or small terraces – without compromising comfort.
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Quiet and unobtrusive operation - Operates almost silently thanks to NMS™ noise control and LFN™ anti-vibration technology, making the pump a discreet part of your home, even when installed nearby living spaces.
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Customizable design and seamless integration - With a modern, monolithic exterior and no visible screws, VERSI blends perfectly with interiors. Customization is possible with options for outdoor (VERSI-O), indoor (VERSI-I), or flexible balcony solutions (VERSI-X).
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Intelligent optimization and control - The OptiWeather system automatically adjusts operating modes based on outdoor conditions, saving energy and enhancing comfort. Remote control is available via the CLOUD.KRONOTERM mobile app.
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Savings and sustainability - Long-term performance: over 15 years, the pump can deliver up to 200 MWh of renewable heat, reducing fuel use and 45 tons of CO₂, equivalent to saving around 220 trees.
Compact, flexible, and powerful – VERSI is designed to fit anywhere while delivering exceptional efficiency. Perfect comfort, even in the smallest spaces.
Available in Heating Capacity:
7kW
Power Supply:
~ 230 V; 50 Hz
Water Temperature:
7 - 67 °C
Configuration
The VERSI-O and VERSI-X are installed together with a HYDRO C2, HYDRO S2, WR KSM 2 indoor units. VERSI-I heat pumps incorporate all necessary heating system elements in one, combining with a DHW tank and buffer tank, etc.
Legend:
A VERSI-O heat pump
B VERSI-X heat pump
C VERSI-I heat pump
D1 HYDRO C2 compact hydraulic indoor unit
D2 HYDRO S2 hydraulic indoor wall unit
D3 WR KSM 2 wall controller
Sample kit, fully prepared for installation and operation, including heating, cooling, and domestic hot water (DHW).
VERSI-I 0209-K1 HT / HK UF E 2
High-temperature air/water heat pump with adaptable heating power for indoor installation. Includes: powder coated, zinced, steel plate housing, color WHITE (RAL 9003), acoustically insulated housing, special vibration dampening and control, condensate drain tray.
Heating Capacity: 7,0 kW
Functions: Heating, Cooling, Preparation of hot sanitary water, Regulation of the heating system, Additional heat source
Heat source: Air
SCOP: 4,84
Power Supply: 1 x 2 kW ~230 V 2 x 2 kW ~230 V
Air Temp.: -25 - 40 °C
Sound Pressure (1m): 28 dB [A]
Water Temperature: 7 - 67 °C
BO_HR 160
160 l high-performance hot water tanks fo heat pumps
Price from: 13,245.00 €
25,905.00 лв
8,865.00 €
17,338.00 лв
Prices are valid until 31.12.2025
Year-End Offer
Prices include VAT
The set shown represents just one of the many available options. Depending on your needs, we provide a wide range of solutions and combinations for domestic and commercial clients, with options for B2B or B2C sales, commissioning, and both warranty and post-warranty service.
Please contact us for a free, customized offer tailored to your requirements.
ADAPT-Max
Compact, stylish, and intelligent air-to-water heat pump
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Maximum Comfort and Efficiency - ADAPT Max is an advanced version of ADAPT, designed for larger homes or small commercial spaces. It provides optimal heating, cooling, and hot water preparation with minimal energy costs.
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Quiet and Unobtrusive Operation - Thanks to its advanced noise insulation and vibration control system, ADAPT Max operates almost silently, ensuring peace and comfort in your home or office.
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Intelligent Control and Optimization - With the CLOUD.KRONOTERM app and OptiWeather system, the heat pump automatically adjusts its operating mode based on external conditions for maximum energy efficiency and comfort.
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Elegant and Adaptive Design - ADAPT Max comes in a stylish casing, designed to seamlessly integrate into any interior, made from durable and eco-friendly materials.
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Savings and Sustainability - With a high SCOP and optimized consumption, ADAPT Max ensures quick ROI and significantly reduces energy costs while minimizing your carbon footprint.
Strong, intelligent, and future-ready – ADAPT Max delivers maximum performance and savings for larger homes and buildings. Comfort without compromise.
Available in Heating Capacity:
35kW - 70kW - 105kW - 140kW
Power Supply:
3N ~ 400V, 50Hz
Water Temperature:
7 - 67 °C
Configuration
ADAPTMAX heat pumps are combined with the WR KSM 2 MAX 10XXX, WR KSM+ and WR KSM C indoor units.
Legend:
A ADAPTMAX 10035
B ADAPTMAX 10070
C ADAPTMAX 10105
D ADAPTMAX 10140
E WR KSM 2 MAX 10035 I WR KSM+
G WR KSM C F-HWR KSM 2 MAX 10(070/105/140)
Sample kit, fully prepared for installation and operation, including heating, cooling, and domestic hot water (DHW).
ADAPT MAX 10035 HT / HK 3F N
High-temperature air/water heat pump with adaptable heating power for outdoor installation
Heating Capacity: min - max 10 - 35kW
Cooling power: min – max 10 - 35 kW
Functions: Heating, Cooling, Preparation of hot sanitary water, Additional heat source
Heat source: Air
SCOP: 5,82
SEER 7/18 °C: 5,43 / 8,01
Power Supply: 3N ~ 400V, 50Hz
Air Temp.: -25 - 40 °C
Sound Pressure (1m): 41 dB [A]
Water Temperature: 5 - 75 °C
WR KSM 2 MAX 10035
Basic wall control unit for ADAPT MAX 10035
The set shown represents just one of the many available options. Depending on your needs, we provide a wide range of solutions and combinations for domestic and commercial clients, with options for B2B or B2C sales, commissioning, and both warranty and post-warranty service.
Please contact us for a free, customized offer tailored to your requirements.
Legend:
A Heat pump ADAPTMAX 10035
B Heat pump ADAPTMAX 10070
C Heat pump ADAPTMAX 10105
D Heat pump ADAPTMAX 10140
E WR KSM 2 MAX 10035 wall control unit
F WR KSM 2 MAX 10070 wall control unit
G WR KSM 2 MAX 10105 wall control unit
H WR KSM 2 MAX 10140 wall control unit
I Expansion wall-mounted control unit WR KSM+
J KT-2A Controller
DOMESTIC HOT WATER (DHW) HEAT PUMP
ECO
Maximum efficiency and a sustainable solution
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High efficiency — Energy class A+ with COP 4.0, certified according to TÜV.
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Up to 800 l of hot water daily at 40 °C — suitable for families of up to 7 people.
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Savings and sustainability — reduces hot water heating costs by up to 80% and CO₂ emissions by up to 70%.
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Easy installation and operation — one-day installation, intuitive LCD graphical display, with optional remote control via the CLOUD.KRONOTERM app.
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Two tank sizes — available in 271 l or 376 l (at 40 °C).
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Water safety — automatic anti-legionella program heats up to 65 °C.
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Improved performance — EC fan with low consumption and adjustable speed for optimal COP.
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Wide temperature range — reliable operation even at outdoor temperatures down to −7 °C, thanks to an active defrost system.
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KRONO-FLEX system — flexible air duct solution: circulation within the same room or ducted mode, for example cooling basements or storage areas.
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Compatible with other heating systems — easy integration with solar collectors, biomass, or other heat sources.
Efficient, eco-friendly, and smart – ECO delivers abundant hot water with minimal energy use. Perfect for families who value comfort and sustainability.
1. ELECTRIC HEATING
2. HEATING OIL
3. PELLETS
4. SSE + HEATING OIL
5. ECO HEAT PUMP
6. SILVER HEAT PUMP
7. STAR HEAT PUMP
Price from: 4,310.00 €
8,430.00 лв
2,802.00 €
5,480.00 лв
Prices are valid until 31.12.2025
Year-End Offer
Prices include VAT
Sample kit, fully prepared for installation and operation.
WP2 LF-202E/1 E D PV P - ECO
Domestic hot water (DHW) heat pump, 200 [l], ECO
Heating Capacity: 1830 (3330) W
Tank Volume: 200 l
Heat source: Air
SCOP: 4,0
Power Supply: ~ 230 V; 50 Hz
Water Temp.: 10 - 65 (85 with electric heater or additional source) °C
Sound Pressure (1m): 44/46 dB [A]
Contact us for a personalized quote and fast consultation.
KRONO-FLEX system
The KRONO-FLEX system captures and exhausts air. Innovative construction helps adjust where air is captured and exhausted.
Within a room the heat pumps both capture and exhaust air back into the room in which it is positioned. The position allows that channels be set for optimum circulation of cold and warm air. It is adapted for use with no additional pipes to prevent the mixing of air on the heat pump’s vacuum (capture) side and the pressure (exhaust) side.
The channel method of directing air makes it possible to exhaust air into a separate room – i.e. both capture and exhaust can be in a separate room, or capture in one and exhaust in another.
SILVER
The best balance between cost and savings
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Energy class A+ and TÜV-certified COP 3.8 with up to 75% savings — high efficiency reduces electricity consumption and lowers hot water costs significantly.
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Affordable investment with quick return — installation costs are lower than solar collectors, and the payback period is fast.
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Two tank sizes — 271 l or 376 l of usable hot water at 40 °C, suitable for families of 4–6 people.
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User-friendly interface — easy-to-use menu and simple installation, with flexible connection options to other heating systems or additional heat sources.
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Health protection — automatic anti-legionella program heats water up to 65 °C when needed (standard heating up to 55 °C).
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KRONO-FLEX system — flexible arrangement of air intake and exhaust, with the option to direct cooled air into basements or storage areas for extra benefit.
Affordable, reliable, and practical – Silver offers the ideal balance of investment and savings. Hot water comfort with proven efficiency for every household.
1. ELECTRIC HEATING
2. HEATING OIL
3. PELLETS
4. SSE + HEATING OIL
5. ECO HEAT PUMP
6. SILVER HEAT PUMP
7. STAR HEAT PUMP
Price from: 3,778.00 €
7,388.00 лв
2,455.00 €
4,802.00 лв
Prices are valid until 31.12.2025
Year-End Offer
Prices include VAT
Sample kit, fully prepared for installation and operation.
WP2 LF-202S/1 E PV - SILVER
Domestic hot water (DHW) heat pump, 200 [l], ECO
Heating Capacity: 1830 (3330) W
Tank Volume: 200 l
Heat source: Air
SCOP: 3,8
Power Supply: ~ 230 V; 50 Hz
Water Temp.: 10 - 65 °C
Sound Pressure (1m): 44/46 dB [A]
Contact us for a personalized quote and fast consultation.
KRONO-FLEX system
The KRONO-FLEX system captures and exhausts air. Innovative construction helps adjust where air is captured and exhausted.
Within a room the heat pumps both capture and exhaust air back into the room in which it is positioned. The position allows that channels be set for optimum circulation of cold and warm air. It is adapted for use with no additional pipes to prevent the mixing of air on the heat pump’s vacuum (capture) side and the pressure (exhaust) side.
The channel method of directing air makes it possible to exhaust air into a separate room – i.e. both capture and exhaust can be in a separate room, or capture in one and exhaust in another.
S-MAX
High-capacity hot water solution for large households
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Energy class A+ and TÜV-certified COP 3.7 with up to 70% savings — high efficiency reduces electricity consumption while providing large volumes of hot water.
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Maximum capacity for large households — ideal for families of 6–11 people or homes with higher hot water needs.
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Two tank sizes — 376 l or 500 l of usable hot water at 40 °C for extended supply.
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User-friendly interface — intuitive menu and simple installation, with flexible connection options to other heating systems or additional heat sources.
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Health protection — automatic anti-legionella program heats water up to 65 °C when needed.
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KRONO-FLEX system — flexible arrangement of air intake and exhaust, allowing cooled air to be directed into basements or storage areas for extra benefit.
Powerful, versatile, and built for more – S-Max provides large volumes of hot water for big families and demanding needs. Maximum capacity, minimum energy costs.
1. ELECTRIC HEATING
2. HEATING OIL
3. PELLETS
4. SSE + HEATING OIL
5. ECO HEAT PUMP
6. SILVER HEAT PUMP
7. STAR HEAT PUMP
Price from: 6,743.00 €
13,188.00 лв
4,383.00 €
8,572.00 лв
Prices are valid until 31.12.2025
Year-End Offer
Prices include VAT
Sample kit, fully prepared for installation and operation.
WP4 LF-502/1 E D PV P - S MAX - COMMERCIAL
Domestic hot water (DHW) heat pump, 500 [l], ECO
Heating Capacity: 1830 (3330) W
Tank Volume: 500 l
Heat source: Air
SCOP: 3,9
Power Supply: ~ 230 V; 50 Hz / 3N 400 V; 50 Hz
Water Temp.: 10 - 65 (75 with electric heater or additional source) °C
Sound Pressure (1m): 49 dB [A]
Contact us for a personalized quote and fast consultation.
KRONO-FLEX system
The KRONO-FLEX system captures and exhausts air. Innovative construction helps adjust where air is captured and exhausted.
Within a room the heat pumps both capture and exhaust air back into the room in which it is positioned. The position allows that channels be set for optimum circulation of cold and warm air. It is adapted for use with no additional pipes to prevent the mixing of air on the heat pump’s vacuum (capture) side and the pressure (exhaust) side.
The channel method of directing air makes it possible to exhaust air into a separate room – i.e. both capture and exhaust can be in a separate room, or capture in one and exhaust in another.