GENERAL INFORMATION

Palacio de los Miranda

Construction year: 2024

Climate zone: Csb - Warm-summer Mediterranean climate

Santuario 2, Enrique IV, 47002, Valladolid, Spain

Architect

U·rb atelier
Owner

Piscis 28 inversiones y construcciones S.L.

Architect

U·rb atelier
Owner

Piscis 28 inversiones y construcciones S.L.

El Palacio de los Miranda is a Renaissance palace from the 16th century located in the historical centre of Valladolid, at the north-west of Spain, in the centre of the Castilla y León region. The building was in a state of ruin and was renovated in 2012, maintaining the two façades with the typical layout. In 2023 the construction works restarted, finishing all the interior distribution of the housing units and improving the thermal envelope to make it more efficient, to adapt the palace to PEB standards.

The main technologies and innovations installed in the building are: High efficiency and thin insulation; PV, aerothermal HP, EV charging stations and controlled ventilation with heat recovery; Integration of all building systems in a single centralized BMS; Innovative integrated controller for energy management.

Building gross area & Net area

Gross area 2.103,39m2 (*bg) + 2.112,25m2 (*ag) = 4.215,64 m2, Net area 1.759,64 (*bg) +1.769,36 (*ag) m2 = 3.529 m2, * Below ground/above ground

Number of floors above ground and below ground

Ground floor: commercial use, First floor: residential, 1st under eaves: residential, 2nd under below deck

Number of dwellings

9 units, 5 in duplex typology

Average net area per dwelling

3 units around 100 m2, 4 units around 145 m2, 2 units around 63m2

Types of outdoor and common areas (greenery, type of vegetation in the surroundings)

Existing old Tuscan courtyard, covered with a skylight, The surrounding is a pedestrian area with no green areas

Charging stations

2 charging station + pre-installation in all the other parking plots

Other relevant aspects

the building is classified as a historic monument limiting the possibility to intervene in the exterior of the building

Technology solution sets

Heating, cooling and ventilation

The HVAC and Domestic Hot Water (DHW) system in this house features a centralized air-source heat pump for both heating and cooling, delivering comfort through a radiant floor system, while balanced mechanical ventilation with heat recovery ensures efficient airflow, and a separate heat pump provides domestic hot water independently from the heating system.

Building Technology	Type of System	Technology	Distribution System
Primary Heating System	Centralized	Air source heat pump	Radiant floor
Cooling System	Centralized	Air source heat pump	Radiant floor
Ventilation		Balanced mechanical ventilation with heat recovery at building/apartment/room level
Domestic Hot Water	Other: Not integrated with the heating system/there is a different system that provides heat	Other: Heat pump

Renewable energy production

The building features a roof-integrated PV system oriented to the south-east and south-west, comprising 139 units of 425Wp each for a total of 59.075 kWp. This renewable energy setup not only enhances sustainability by harnessing solar power but also guarantees the building's PEB status.

Electrical storage battery:

-
Photovoltaic rooftop system:

58.22 KW peak installed

Energy Renewable Technology	System Type	Main PV Panel orientation	Total Installed Capacity (KWP)
PV Systems (KW peak installed, surface area, total or per m²)	Roof integrated PV system	South-east South-west	59,075kwp, 139 units - 425Wp

Envelope technology

Building envelope

The building envelope is crucial for thermal performance, energy efficiency, and indoor comfort.

The exterior walls feature a double brick layer with ACTIS insulation and a U-value of 0.15, while interior walls have gypsum board and air chambers with a U-value of 0.3.

Wall	Material Used	U Value
Exterior wall facade	Cotegran, double brick layer with insulared air chamber, ACTIS Insulation, plasterboard, gypsum board.	0.15
Interior Building Wall	Gypsum board, plasterboard with insulated air chambers	0.3

The roof integrates tiles, XPS insulation, and ACTIS Triso-Laine, with a U-value of 0.14. The ceiling and floors have insulated concrete joists, radiant heating, and a U-value of 0.32.

Roof	Material Used	U Value
Exterior Roof	Existing roof (roof tile over an XPS insulated air chamber with a wooden batten over concrete joist) insulated with ACTIS Triso-Laine and plasterboard	0.14
Interior Ceiling/Floor	Insulated concrete joist and vault, with insulated radiant floor system and ceramic cover.	0.32

Windows vary in efficiency, with new ones having a U-value of 0.7, improving insulation. This well-designed envelope minimizes heat loss and enhances energy efficiency.

Window	U Value	G Value	Shading Type
Existing Facade windows	2.4	0.76	None
Existing velux	1.4	0.5	Inner shading
New windows	0.7	0.3	None

Culture and climate

Integrating cultural ventilation habits with energy-efficient design

The building design balances cultural ventilation habits with energy efficiency by incorporating manually openable windows, individual room thermostats, home automation for adaptive heating, and multiple ventilation strategies, including mechanical systems and recirculation hoods.

Culture Climate Survey

Discover more about cultural aspects

Peb tips for designers by designers

How to achieve successful Plus Energy Buildings

Advice on building technologies

Coordinating innovative design with engineering firms and technology centers can be challenging. A skilled intermediary who understands all disciplines is essential to streamline communication, manage the construction process, and ensure seamless integration of building technologies.

Skilled labor shortages and high costs pose additional hurdles, particularly when working with unconventional materials like thin insulation. Finding experienced installers for such specialized tasks remains a challenge.

Additionally, coordinating sensor installation requires careful planning to ensure proper placement, functionality, and integration with other building systems.

Resident interaction

Assessing resident interaction with technology is challenging since the building is a monument and not yet occupied. However, a structured approach to post-occupancy monitoring is essential.

A dedicated platform for residents to provide feedback on the building’s functionality would help identify areas for improvement. Ideally, the building administrator should monitor this feedback and use it to fine-tune technologies, such as adjusting temperature setpoints.

Additionally, a neighborhood center could collect resident feedback and offer training sessions, empowering residents to make small, effective changes that enhance energy efficiency in their homes.

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