CS11 “Tsanko Dustabanov” Primary School, Gabrovo

Current status: 
IN TENDER PROJECT
Country: 
Bulgaria
Building Owner: 
Municipality of Gabrovo
Consulting EuroPHit Partner: 
Existing treated floor area (usable floor space): 
5 465.00 m²
Original situation: 

The building consists of three interconnected blocks.

Block A was constructed in 1962.  It consists of five floors and a basement ( 2040 m2). The block has a concrete structure with external brick walls (40 cm) and concrete flat roof in very bad condition.

Block B was constructed in 1946.  It consists of three floors and a partial basement ( 2480 m2)

The block has a concrete structure with external brick walls (30 cm) and pitched ventilated roof above the last concrete ceiling slab with 10 cm glass wool insulation.

Block C, commissioned in 1999, is a large gymnasium with a 633 m2 area. There is a ground floor connection to Block B with an area of 311 m2, which comprises dressing rooms  and bathrooms . The Hall and the connection consist of concrete structures with external walls of Ytong (20 cm). The roof of the hall has a steel structure. The connection has a flat concrete roof without insulation.

There is a boiler room in each block.

The building is connected to the district heating network.

Modernisation proposal: 
The Project will propose refurbishment in the following steps: 
 
Block A: Block A1: step 1) Roof insulation block A, wall insulation block A1; step 2) external wall insulation, new windows, shading, airtightness, ventilation, reducing thermal bridges; step 3)  New  District heating substation (the one from Gym could be used)
 
Block B: step 1)  external wall insulation,  change of windows, insulation of the perimeter of the foundations, airtightness , shading, ventilation; step 2)  Adding thermal insulation on  the roof above the existing one ; step 3)  New  District heating substation (the one from Gym could be used)
 
Block C: step 1) External wall insulation, ventilation, change of old PVC windows in the dressing rooms; step 2)  Roof insulation; step 3)  New LED lighting will replace the existing mercury lamps in the Gym. Fourteen solar panels for DHW will be added in block C (for the dressing rooms in the Gym). For achieving better comfort in the summer, new heat-pump air-to water to be installed in the Gym on later stages.
 
NEXT STEPS:
Block A: Insulation under the floor slab above the unheated basement block A , New LED lighting
Block B: Insulation under the floor slab above the unheated basement block A , New LED lighting
Block C: change of aluminium windows
 
Efficiency improvement: 
PHPP verification sheets before retrofit before retrofit: 
PHPP verification sheets before retrofit after retrofit: 
Current situation: 

The project is on tender stage. The construction works are expected to start in February 2016. There are no new pictures and no challenges foreseen yet.

Connection details and thermal performance of the building: 
Address: 
25, Hristo Smirnenski Blvd, Gabrovo
5300 Gabrovo
Bulgaria

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