Case Study: nZEC - Energy refurbishment of 18 dwellings in Rõõmu Street, Tartu, Estonia (UNDER MONITORING)

Name of organisation: EKÜL - The Estonian Union of Co-operative Housing Associations

Stage of development: completed

Year of finalization: 2012

Type of project: refurbishment

Area: urban

Scale: individual buildings

Type of building: Apartment in a block of five or less stories

Number of units/dwellings: 18

Tenure: shared ownership/cohousing

Street: Rõõmu str

Postcode: 12

City: Tartu

Region/ County: Tartumaa

Country: Estonia

Last Update: 23.02.2015

Funding Project Management Monitoring Work with Residents

Short Description

The project was carried out because of high price for heat and uncomfortable indoor climate. Heating system was one pipe system with no possibility to regulate on the radiator level. Ventilation was designed as natural from windows, but due to the fact that most of the appartements have already changed windows the natural ventilation does not worked properly any more. Heating system was unbalanced and heat supply to the radiators was unstable. At the same time support scheme for renovation was available.

Scheme terms were connected with energy saving % compared with last 3 years consumption. Conditions - 35% investment support means 50% savings. Association general meeting decided to go on 35% investment support. Flat owners are in 50% pensioners with reasonable low income (about 300 EUR month). Conditions foreseen that renovation should consist from total insulation of all external walls (U value 0,2) and roof (U value 0,15), installation of windows with U value not higher than 1,1. Heating system should be regulated on the radiator level, ventilation should have heat recovery element, flat based system was decided to use. Renovation project was designed for these conditions.


Key Elements

Project Management

Monitoring service quality.


Work with Residents

Site visits together with community members.


Funding

Energy efficiency measure

Ir

Iee,brutto [€]

Iee,netto [€]

Life time [years]

[€]

1 Additional insulation for all external areas (roof 200 mm, walls, basement with 150 mm of insulation)

 

103 000

51 500

40

2 Replacement of all old windows (U value more than 2 replaced with U value less than 1,1)

 

2 000

1 000

30

3 Heating system renovation from one-pipe system to two-pipe system with thermostatic valves

 

45 000

11 250

40

4 Heat recovery ventilation system installation (room based system)

 

27 000

27 000

20

Total

 

177 000

90 750

 

Running costs

 

4 608

4 608

 

Simple pay back time

 

38

20

30




Monitoring

Click here to access the monitoring data on the HIVE Database!


Main Results

The most important is that flat owners got comfortable living with high quality indoor climate and with the same annual expenditure like before renovation. The apartments value is higher and house main constructions are now protected and there is no thermal bridges. Ventilation system will use exhaust air heat, heat consumption is expected 50% less than before.


Lessons learned

The awareness of flat owners should be on the level before the refurbishment decision that they can understand the difference to live in not renovated and renovated apartment house.


Additional Information

Ms Anu Sarnet
EKÜL - The Estonian Union of Cooperative Housing Associations
E-mail: anu.sarnet@ekyl.ee
Web: www.ekyl.ee


Source: http://www.powerhouseeurope.eu/nc/cases_resources/case_studies/single_view/?tx_phecasestudies_pi3%5Bid%5D=171&tx_phecasestudies_pi3%5Bdisplaytype%5D=overview&cHash=