The presentation introduces you to the work of the GrowSmarter Lighthouse City of Barcelona on smart solutions for energy retrofitting of residential buildings.

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THE GROWSMARTER PROJECT
2015-2019
Gas Natural Fenosa
Experiences in Barcelona: Energy-efficient
refurbishment in residential buildings

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Content:
1. Introduction
2. Refurbished buildings and works carried out
a)Canyelles
b)Ter 31
c) Lope de Vega 101
d)Melon District
3. Business Model

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1 Introduction

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Gas Natural Fenosa role in GrowSmarter project:

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Gas Natural Fenosa role in GrowSmarter project
1. Efficient and Smart climate
shell refurbishment
• 4 residential buildings
• 3 tertiary buildings
Canyelles (H6): Ter 31 (H3): Lope de Vega (H3): Melon District (POST CTE):
It’s easier to find residential buildings interested to participate in energetic refurbishment when a
normal refurbishment project is planned. Also, this strategy reduce the scaffold costs

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Energy-efficiency refurbishment in residential buildings in
Barcelona:
CONSTRUCTION TYPOLOGY OF BARCELONA’S RESIDENTIAL BUILDINGS
(2012):
H3: Buildings before the Spanish Civil War.
( Lope de Vega and Ter)
H6: 1960s. ( Canyelles)
H8: After CTE* . ( Melon District)
CTE*: Technical Building Code (TBC)
65% of the buildings in Barcelona
are represented in these 4
buildings

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Energy-efficiency refurbishment in residential buildings in
Barcelona:
LOCATION OF THE 4 RESIDENTIAL BUILDINGS:
Ter 31
Lope de Vega
Melon District
Canyelles

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2 Refurbished
buildings and works
carried out

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Canyelles (5,180 m2 – savings 147,630 kWh/yr)
MEASURE DESCRIPTION :
• Residential building with 57 dwellings.
• Passive measures: Improvement of façade and roof insulation, low-U
values windows and shading elements.
• Active measures: Change boilers, water efficient taps
• HEMs installation (Home Energy Management system)
BARRIERS / LESSONS LEARNED:
• Information campaigns: It is important to do a good
dissemination before the works about the measures implemented
in the building in order to obtain the collaboration of all the
dwellings. Especially in big building with a large number of
dwellings.
• Installation of windows: High standards are required to assure
low values of infiltrations. In Mediterranean climates, the
installers are not used to these high standards.

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Ter 31 (393 m2 – savings 5,816.4 kWh/yr)
MEASURE DESCRIPTION :
• Residential building with 6 dwellings.
• Passive measures: Improvement of façade and roof insulation and low-U
values windows.
• Active measures: water efficient taps
• HEMs installation
BARRIERS / LESSONS LEARNED:
• A building with a majoritarian owner facilitates the communication
between all the tenants and the work promoter, constructor, etc.
• In old buildings it is likely to find structural problems that could modify the
initial planning.
• In buildings with flats on rent, the tenants should be inform with the
implications of the project and not just the property. The objective is to
assure their collaboration

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Lope de Vega (1,015 m2 – savings 15,428.0 kWh/yr)
MEASURE DESCRIPTION :
• Residential building with 20 dwellings.
• Passive measures: Improvement of façade and roof insulation and low-U
values windows.
• Active measures: water efficient taps
• HEM installation
BARRIERS / LESSONS LEARNED :
The implementation phase is still on going. No lessons learned yet.

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Melon District (13,000 m2 – savings 165,100 kWh/yr)
MEASURE DESCRIPTION :
• Residential building for students with 500 rooms – 13,000 m2.
• Active measures: Reducing primary energy for heating consumptions by
connecting to district heating.
• Existing BEMs adapted with new information points.
• HEMs installation
BARRIERS / LESSONS LEARNED:
• Limitation to connect a building to a DH: In Mediterranean
countries where the DH technology are not extended, it is
challenging to find building with the right conditions and the
willingness to connect its installations to a DH.

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3 Business model

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Business model residential
VALUE PROPOSITION
• For the neighbors’ communities: guarantee of quality of works, guarantee of
energy savings, etc. (ESCO model)
• For investors: reduction of initial investment , guarantee of quality of works,
etc.
COSTS
• Fixed costs: project
development, construction,
commissioning, salaries, etc.
• Variable costs: marketing,
incidentals and delays, energy
cost if supplied, etc.
REVENUE STREAMS*
• Energy supply, if included in
contract
• Payments by the customer.
• Advertising on the scaffold.
* It is needed the collaboration of the public administration due to the low energy consumption of the
residential buildings (no in tertiary buildings) in Mediterranean climate.

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This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no 646456.
The sole responsibility for the content of this presentation lies with the GrowSmarter project and in no way reflects the views of the European Union.
- Alejandro Roset
- Gas Natural Fenosa
- proyectos_smartclient@gasnaturalfenosa.com