Case Studies

Office building Castellana 19

Madrid, Spain

Code: OP20

Retrofitted floor plan
© Ruiz Larrea
Retrofitted elevation
© Ruiz Larrea
DesignPH 3D of the building and the surroundings
© Ruiz Larrea
DesignPH 3D of the building and the surroundings
© Ruiz Larrea
Thermal envelope
© Ruiz Larrea and VAND arquitectura
Airtightness concept
© Ruiz Larrea and VAND arquitectura
Ventilation and heating/cooling system- Example
© Ruiz Larrea
Ventilation and heating/cooling system- Roof floor
© Ruiz Larrea
Ventilation and heating/cooling system- Basement
© Ruiz Larrea
Existing building
© Ruiz Larrea
Existing building
© Ruiz Larrea

Original situation

The original building, located in the city of Madrid, consists of two independent volumes separated by a central courtyard and connected through the basement floor, which is out of the thermal envelope.
The main building has five floors, and the second building has three floors. The main building has a protected historic façade, making implementing the airtight layer difficult.
The building from 1903 was retrofitted in 1986 using a traditional construction system.

Renovation approach

Construction works in progress. EnerPHit certification in progress.

 

Renovation approach document

Modernisation proposal

In this retrofit, the EnerPHit standard will be achieved through the Energy Demand Method. It is a complete renovation, including the following actions:

  • Building envelope insulation (facades, roof, floor towards basement)
  • Windows, doors, and roller shutter replacement
  • Airtightness improvement
  • Ventilation system with heat recovery installation
  • Heating and cooling systems renovation
  • Improvement of existing thermal bridges

Efficiency improvement

No calculations available for the existing building yet, no monitoring results available.

PHPP verification sheet after retrofit

PHPP verification sheet after retrofit

TFA existing treated floor area (usable floor space)

3231.51 m2

Space heating Heating demand

1.0 kWh/(m2a)

Heating load

–  W/m2

Space cooling Cooling & dehum. demand

15.0 kWh/(m2a)

Cooling load

– W/m2

Frequency of overheating (> 25 °C)

– %

Frequency of excessively high humidity (> 12 g/kg)

0.0 %

Airtightness Pressurization test result n50

1.0 /h

Non-renewable Primary Energy (PE) PE demand

72.0 kWh/(m2a)

Primary Energy Renewable (PER) PER demand

41.0 kWh/(m2a)

Generation of renewable energy (in relation to projected building footprint area)

– kWh/(m2a)

EnerPHit classic

yes

Video

Click to view via Youtube (Google)

Key facts

Building typology

Office | administration building

Existing treated floor area (usable floor space)

3 231.5 m2

Building owner

CCS Consorcio de Compensación de Seguros

Consulting outphit partner

VAND Arquitectura

Project status

Construction phase

Overall budget

9 338 618 €

Contact

Nuria Díaz Antón
VAND arquitectura
Phone: +34 917751267
E-Mail: info@vandarquitectura.info