Case study
Královka - the Czech Republic
Královka in Bedřichov is the perfect retreat in the Jizera Mountains, Czech Republic! Here, you can enjoy breathtaking views from the iconic lookout tower, the comfort of a modern hotel, delicious Czech cuisine, and relaxation in the wellness center.
introduction of the place
Where it is
The Královka Complex in Bedřichov is a modern recreational center in the heart of the Jizera Mountains, offering a variety of accommodation, sports, and relaxation options. The centerpiece of the area is the Královka lookout tower, which provides stunning views of the surrounding landscape, attracting tourists and nature enthusiasts alike. The complex includes a hotel, a restaurant serving Czech cuisine, a children's playground, sports facilities, and a wellness center. Královka is a popular year-round destination: a starting point for cross-country skiing trails in winter and perfect for hiking and cycling in summer.
Customer's requirements
The challenge
The installation of ventilation systems for the Královka complex presented specific challenges. The project demanded high standards for unit functionality and efficiency, long-term sustainability, service support, the design of the ventilation ceiling in the open kitchen, and the full automation of the entire complex’s system.
For the ventilation kitchen ceilings, we had to meet special requirements from the architect, particularly regarding integration with the interior design and dimmable lighting. The main challenge was the limited height in the brewing area, which constrained both the design and installation options. Additionally, the window height was critical — the ventilation ceiling could not be mounted lower than the window line. To meet all these demands, we developed a unique ceiling solution, unlike anything we had previously implemented.
Regarding the units themselves, specific requirements were set for the air volume capacity, which we not only met but exceeded, allowing for additional capacity.
kitchen ventilation & commercial line
The solution
In the Královka complex, we implemented a comprehensive ventilation solution that meets the specific requirements of each area.
We installed a ventilation kitchen ceiling 60 m2 in the mail kitchen, which must be separated from the restaurant to prevent customers from being disturbed by sounds and odours from the kitchen. In the open show kitchen of the restaurant, we used a 28 m2 ventilation ceiling in an exclusive design with custom lamination, tailored to the high interior standards set by the architect. Both ceilings are connected to a DUPLEX 10 100 Basic heat recovery unit, ensuring efficient and energy-saving ventilation in the kitchen areas.
For the ventilation of rooms, corridors, facilities, and reception areas, we implemented the DUPLEX 3 500 MultiEco heat recovery unit, which maintains high air quality throughout the complex. The wellness areas are equipped with a DUPLEX 580 ECV heat recovery unit, providing targeted ventilation adapted to the specific needs of these relaxation zones.
Principle of our ceilings
How does the ceiling connected to the unit work?
Our highly efficient (99%) ATREA ventilation ceilings have the option of using a DUPLEX Basic heat recovery unit for efficient air exchange in the kitchen.
Polluted air is extracted and filtered through high quality stainless steel filters and then also as an option eliminated by the UV-C filtration technology.
The ceilings are a closed system which means air-tight solution that preserves the building construction and eliminates smell into the premises. This solution provides optimal working conditions for the kitchen staff.
Atrea offers a complete system – ventilation ceiling with filtration together with air-handling unit and control system. All delivered and installed by one supplier!
Payback with a heat pump: pays off within 5 years
With a heat pump, the ventilation system gains a strong economic dimension. Within 5 to 7 years, the investment into the heat pump typically pays back, and the system then starts generating heat “almost for free.”
Performance & consumption:
- Airflow: 10 000 m³/h
- Air cooling by HP: approx. 7–8 °C
- Heat pump output: up to 40 kW (depends on humidity and coil condensation)
- COP (coefficient of performance): ~4 (inlet 7/2 °C; outlet 45/50 °C)
- Average heat gain: 28 kW for 7 kWe HP input
Economic calculation:
- Electricity price: 0,2 €/kWh
- Resulting heat price: 0,1 €/kWh
- Net benefit: 0,9 € per operating hour
- Daily operation: 14 hours
- Annual operation: 340 days
- Annual benefit: approx. 4.100 €
Investment: Adding a heat pump (HP) to the system costs approximately € 20.500 – 28.800, increasing the total project cost by about the same amount; however, with an annual saving of around € 4.100 on heat recovery, the payback period is roughly 5–7 years.
Feedback from the customer
“ATREA solution meets all our requirements for functionality, design, and quality, with provisions for regular servicing to ensure long-term system reliability and performance.”
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Video testimonial
Catch an interview with the owner of Královka, in which he describes what their requirements were and how it all works.
Gallery
Look around & inside
The result
Odourless
enviroment
Pleasant indoor working environment and clean air around the show-piece kitchen, hotel restaurants, school canteens, cafés and other premises.
Automatic temperature control
Fully automatic control system with continuous power control based on temperature and humidity, designed specifically for kitchen operation.
Clean ventilation ducts
Grease-free air ducts thanks to highly efficient filtration or built-in UV-C technology - almost 99% efficiency.
Protection of the engineering networks
The revolutionary, closed ventilated ceiling system provides protection for built-in luminaries, ceiling structures and other engineering networks.
Installed products
DUPLEX Basic
Product detail
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