supported by


Tallinn City Government

Kadri Kallas, REBECEE Project Manager
Vabaduse väljak 10, 10146 Tallinn, Estonia
Phone: + 372 640 45 02 Fax: + 372 640 45 01


22.5.2009 - Tallinn/Estonia
Tallinn REBECEE building exhibition opened

The opening ceremony of the Tallinn REBECEE building exhibition took place on 22th of May in busiest shopping centre in Tallinn, Viru Keskus. The REBECEE project partners from Germany, Holland and Sweden took part on the opening ceremony of the exhibition. Vice Mayor of Tallinn Eha Võrk opened the exhibition, the speeches were also made by Head of Tallinn City property department Einike Uri, Mayor of Kiel Peter Todeskino and REBECEE project coordinator Peter M. Friemert.

The 10-day period in Tallinn, Viru Keskus, was the introduction to the exhibition and gave the general public possibility to learn about renewable energy technologies and energy saving and get information about Tallinn REBECEE exhibition projects.
The main idea of the exhibition was - The sun! Solar energy! Active and passive solar energy!
In the exhibition the information about solar energy, energy efficiency, passive houses and Tallinn City Projects were presented.

One focus of the exhibition was on the passive house and passive house building process. The passive house planning, location and architecture, walls and isolation, doors and windows, roof, heating and ventilation were introduced. This was the most popular subject of the exhibition and many visitors were interested to learn more about the passive house technologies and passive house projects in Estonia.

The important part of the exhibition was the introduction of the Tallinn City Projects, Two study tours took place and gave the public and also the REBECEE project partners the chance to see the Tallinn REBECEE projects.
The corner for active solar energy use was introducing samples, panels, water heaters, working models and "how everything works" diagram. It was attractive to people since many visitors have never had a contact with renewable energy components. It gave them opportunity to see exactly how they work and ask questions.

Practical part of the exhibition gave the answers to many visitors and who found this still not to be enough were able to register themselves to the renewable energy seminars and workshops what are taking place all through the exhibition time.
The workshops are addressed to the different target groups - municipal officers, craftsman, architects, planners, trade companies, investors, civil servants and key actors. First seminars have been already taken place and have attracted a vide audiences.
The closing event of the Tallinn REBECEE Exhibition will take place on 18th on June in Tallinn City Property Board.


Otepää - Passive house standard hotel

The horseshoe-shaped hotel fits into the South-Estonian hilly landscape near a golf course in Otepää. The building is planned to achieve the passive house standard although the somewhat unusual geometry of the building made the planning phase more complicated and more attention had to be drawn on specific details like avoiding thermal bridges in the building envelope. Elements like the green roof and the solar panels influence the first impression of the building but are also important parts of the energy concept.
Hot water – solar heating system installed for the production of hot water (and room heating). 34 solar collectors (75,14 m2) placed on the roof and on the ground facing South, tilt angle 45 deg., 5 m3 hot water storage tank with electric backup heating. A more detailed description of the solar heating system is given afterwards.

Valga - Kindergarten reconstruction to passive house standard

The existing kindergarten seen on the pictures below was built in the 1960´s, a two storey building with an additional one storey kitchen and dining area. The building is situated in a residential district of town Valga in South Estonia. According to given data from the years 2003 – 2005 the average heat demand of the building was 253 MWh/year which gives us the average specific heat demand of 280 kWh/m2 per year.
The goal of the reconstruction project was to increase the floor area of the house from the existing 901, 4 m2 to 1040 m2 by adding a second floor to the one storey building, to fulfil the requirements of a passive house, which means reducing the heating energy demand to 15 kWh/m2 per year and to install a solar heating system in order to use solar energy for the production of warm water and for room heating.
Room heating – solved with compact heat pump units, that recover heat from the ventilated air and heat the fresh air when necessary with water-to-air heat exchangers for using solar energy or energy from the district heating system.
Hot water – solar heating system installed for the production of hot water (and room heating). 28 solar collectors (71,96 m2) placed on rooftop facing South-Southeast, tilt angle 55 deg., 4 m3 hot water storage tank. A more detailed description of the solar heating system is given afterwards.

Kiisa - Apartment house in passive house standard

The three storey building will be situated in Kiisa, Harju County. It is planned as a multipurpose building, having a public library and a grocery store on the first floor and apartments on the second and on the third floor.
The block-shaped geometry of the building gives a good envelope area to internal volume ratio, which together with the south facing façade gave a good starting point to achieving the passive house standard during the design process. The open building site with no significant shading objects made it possible to integrate a solar heating system for backup heating and hot water production.
Room heating – heating through fresh air when necessary with water-to-air heat exchangers for using solar energy. Passive house compact ventilation units in apartments.
Hot water – solar heating system installed for the production of hot water (and room heating). 18 solar collectors (39,78 m2) placed on the roof facing South, tilt angle 45 deg., 4 m3 hot water storage tank with electric backup heating. A more detailed description of the solar heating system is given afterwards.

Tartu - Apartment house solar thermal collectors for water heating

The apartment building in Tartu was built in 2004, has 21 apartments and rooms used for commercial purposes. The house is situated in the central part of the town and is closely surrounded and influenced by other buildings.
The goal of the project was to evaluate the possible energy savings by installing a ventilation heat recovery unit with a heat pump combined with solar collectors on the roof for the production of warm water.
Room heating – hot water radiators, district heating.
Hot water – solar heating system in combination with a heat pump. 10 solar collectors (22,1 m2) placed on the roof facing South, tilt angle 55 deg., 1 m3 hot water storage tank connected to the heat pump and boiler. A more detailed description of the solar heating system is given afterwards.

Social housing unit in Tallinn / Kauge street 4

Two storey building with a basement is designed with low disposition roof with outside water outflow and Columbian-stone walls. Sustainable ceilings are engineered with installable hallow panels. Building scheme is L shaped. Capacity of the building shape comes from need to separate different functioning rooms.
Main entrance is planned between L arms.
Building has basement and invalid accessible lift for easier movements between floors. To main entrance is planned disabled road for easy access from outside to the first floor.
To the basement are planned stockroom, laundry area and rooms for laundry staff, sauna, conference room and technical room. In one of the wings of building is planned homeless shelter (living rooms, washing area, rooms for medical workers, kitchen area, rooms for social workers, house manager’s office).
In other wing will be a social house (sleeping places, kitchen area, wash rooms and toilets). Near the main entrance is planned supervision/guard room, hallway, lift, stair case. On a second floor will be accommodation for people with special needs (living rooms, sanitary junction, kitchen, resting area for staff, washrooms, stockroom for laundry).
Using renewable energy and energy saving technology in ventilation system and heating.
An alternative heating supplier will be between basement and first floor located water floor heating system which is supplying air-water heating pump (16kW) with energy. Heating pump’s outside part is located on a roof and inside part in a basement’s heating junction.
Inside part is connected with automatic system what switches on the heating pump according to building’s needs and shown parameters (in case the outside temperature is too low house will be heated with the help of the heating junction).
Energy saving steps will be used partially in a building’s ventilation system S1/V1, S2/V2 (in blow and out blow systems) heat exchanger according to efficiency 55% and 49%.

Refurbishment Mustamäe, Tallinn / Sütiste 45

Sütiste 45 Cooperative housing establishing meeting took place 2nd of June 1999. Panel building what is situated in Mustamäe was built in 1972 and is a typical apartment block with 9 floors and two hallways. 7, 25 million kroons has been invested in the building through many different projects. Thanks to what has been attained, a remarkable living environment and given buildings technical improvement.
Since year 2000 building has got gable roof together with rain water drainage system, joint work in every area in the house, all the walls have been isolated with foam sheet (including balconies’ walls and basement). All windows were changed in apartments, basement and hallways. All balconies were renovated with profile iron sheets. Sliding windows were installed to balconies. Lifts been renovated and old main shield have been replaced, renovated the hallways (removed rubbish bins between floors), carried out refurbishment in fire exits. According to demand the double apartments got dividing walldoors.
Storm porches with a special project were built under front door awnings. New letter boxes were fitted, electricity installer and electricity shields were renovated (according to a requirement), time switch low lighting system was fitted to hallways and exits. Were implemented the change of the plastic utility water tubes when changing the mane water pipes together with basements water pipes. Building it true neighbour building’s basement for receiving dependent water pressures. Renovation of the heating system (radiators and basement’s water pipes) replacing old pipes with plastic pipes together with thermo regulator. To every radiator was installed Mesa individual heating cost divider. Heat pump in thermo station was changed to the one with energy saving regulator. To the living space were installed Starman and also STV cable TV and internet connection.
Building has 4343m2 of land were in near future is planned underground parking spaces plus on a ground a parking lot. Also is planned to build a garbage house, children’s play ground and greenery.
With big renovation work has been achieved considerable energy saving, thanks to what the last year’s average heating energy cost was (despite of energy prices going up) on heating ground only 3.71 kroons per m2. Which means energy saving was 50% less than 7 years ago.
Due to large energy saving we were able to get the bank loan for 5, 5 million kroons.
Sütiste 45 Cooperative Housing has been mentioned even on Estonian Cooperative Housing Units national forum for good economical results. Also the Sütiste 45 was recognize as the best Cooperative Housing and Ragnar Kuusk as the best Cooperative Housing manager in 2006 and in 2007 with best Cooperative Housing renovation work.
Also in 2007 Sütiste Cooperative Housing received a “Good Cooperative Housing” certificate.
In near future it is planned to improve house even more to install the heat pump and also solar panels.

New apartment building Kesklinn, Tallinn / Juurdeveo 19

The apartment building is situated in Tallinn, on the corner of Juurdeveo and Keava streets, which are just a few kilometers from the center of the town. While being very close to an important street Pärnu mnt, it is also situated far enough in the heart of a calm and green city block, away from the noise of the traffic.
The Juurdeveo 19 building has modern architecture and fittings and houses a total of 85 apartments on four floors above the parking floor, divided into four staircases. The modern and compact apartments range from one to four rooms and 25-85m² of net surface. Many
of the first floor apartments have spacious secluded terraces; the upper floors’ apartments have either large or small (so-called French) balconies. The basement floor holds storage spaces and an enclosed parking lot for 54 vehicles. Another parking lot for 31 cars is situated in the enclosed yard. The L-shape of the building, existing greenery in the form of trees and lot boundaries ensure a cosily secluded and safe inner yard. The yard holdsresting areas and children’s playgrounds for the habitants’ recreation.
Besides the good architecture of the building, great effort is made with the apartments’ interior design where integrated solutions are implemented with quality materials and modern methods. The multitude of lighting solutions can be exploited comfortably through the Smart Home intelligent control system that offers an innovative way of controlling the heating, cooling, security, lighting and other systems in all of the apartments through an intelligent computer system. This is a novel solution in apartment techno systems.
Smart Home is an integrated and easily manageable system of systems that covers the apartment’s climate control (floor heating and cooling), (video) surveillance, entry systems and lighting and enables to monitor the electricity, water and heating expenses in real time as well as to receive messages from the house manager. As the advantages and virtues of so-called intelligent buildings are quite imperceptible at first sight and offer comfort and save expenditure foremost during long-term use, such systems have so far been used only in luxury private residences and high-class offices, where the owner or investor is directly interested in the usage of the building during its exploitation period. But why couldn’t the benefits of modern technology be a regular part of a cosy midtown apartment? Juurdeveo 19 Smart Home solution’s heart and soul for each separate user lies in a touchsensitive screen, installed in every apartment, which allows the user to view videos from surveillance cameras situated in the garage, yard or at the front door, in order to identify guests requesting access to the staircase, turn the security on the apartment on and off, adjust room temperature and heating and cooling systems, switch and adjust apartments’ lighting mode, observe utility expenses and much more (for example, see what the weather is like outside). As the system development is ongoing during the construction of the building, the list of functions is not final and can lengthen by new interesting possibilities.

Apartment building Haabersti, Tallinn / Paldiski Road 171

The apartment building that is situated in Õismäe, Tallinn is a typical flat-roofed 5-floor panel building with four stairways that has 60 apartments.
As the apartment building has been used for 25 years or half of its expected life-time, the association decided to refurbish the building in order to lengthen the life-cycle, lower the maintenance costs and raise the quality of life.
In June 2006 the first plan was ready – the design of roof renovation together with the recommendation of renovating the ventilation system. Additionally the renovation design for the heating system was drawn up, which prescribed to build the existing 1-pipe heating system into a 2-pipe heating system, and the reconstruction design for the front of the building. Besides insulating the building (with 150 mm Styrofoam sheets), the problem of glazing the balconies and loggias with the frameless glass system was also resolved. Also the design prescribed the replacement of depreciated and not yet replaced windows of the apartments and stairways, and the replacement of balcony and loggia doors.