Passivhaus via Napoleone Bonaparte in Putignano

Last modified by the author on 19/08/2019 - 10:27
  • Building Type : Collective housing < 50m
  • Construction Year : 2016
  • Delivery year : 2018
  • Address 1 - street : Via Napoleone Bonaparte 17/B PUTIGNANO, Italy
  • Climate zone : [Csa] Interior Mediterranean - Mild with dry, hot summer.

  • Net Floor Area : 737 m2
  • Construction/refurbishment cost : 930 000 €
  • Number of Dwelling : 8 Dwelling
  • Cost/m2 : 1261.87 €/m2

Certifications :

  • Primary energy need
    85 kWhpe/m2.year
    (Calculation method : Other )

A low-cost Passivhaus in southern Italy was chosen as a sample project to test a compact solution for heating, cooling, DHW and mechanical ventilation. An integrated design approach made possible a cost-effective building. High performances in thermal insulation, airtightness and thermal bridge reduction allowed us to adopt such a simple, efficient and cost-effective solution.

Costs and Finance:

This solution has been compared to a complete traditional solution for MEP in the same region (each apartment has heat pump and radiant floor as heating system, ducted air conditioning as cooling system and also MVHR for each apartment. Our MEP solution is 16,3% cheaper.It made possible to achieve a Passivhaus standard but also an affordable selling price. The apartments are on sale at 1.850,00 euro per sqm, that is exactly the price of all the other apartment in the city for a new construction (even if they are really different for energetic performance and internal comfort).

Compact Unit:

The compact system consists of a heat pump capable of recovering the extraction airflow heat to transfer it to the renewal airflow and to a DHW tank. In winter conditions, the heat pump is designed in order to partially condensate the refrigerant on the thermal storage tank, so as to dispose the overheating of the refrigerant fluid, and then to complete the condensation on the fresh air flow heat exchanger. The extraction and renewal flows, pass through a recovery heat exchanger with high efficiency, in order to maximize the energy performance of the whole unit.According to the conditioning of the indoor environment, the Compact unit has four modes of operation, automatically managed by the control system, depending on the internal and external conditions of the building: passive heat recovery, active heat recovery, bypass and active cooling.

Photo credit

Pierangelo Laterza


    Tonik srl

    Pasquale Primavera

Construction Manager

    Pasquale Primavera



    Ing. Giuseppe Colaci De Vitis


Contracting method

Build and sell construction

Energy consumption

  • 85,00 kWhpe/m2.year
  • 100,00 kWhpe/m2.year
  • Other

    Annual heating demand 15 kWh /(m2a )
    Heating load 12 W/m2
    Cooling load 9 W/m2 Cooling and dehumidification demand 13 kWh /(m2a )
    *calculated according to PHPP

Envelope performance

  • 0,15 W.m-2.K-1
  • Exterior wall
    Clay hollow bricks mm 300; EPS mm 180.
    U-value = 0.135 W/(m2K)

    Basement floor / floor slab
    Concrete mm 100; Hollow slab mm 300; Stone wool insulation mm 120.
    U-value = 0.253 W/(m2K)

    Hollow slab mm 300; Stone wool insulation mm 180; Concrete mm 100.
    U-value = 0.176 W/(m2K)

    Rehau, Synego
    U w-value = 1.5 W/(m2K)

    33.1/16/4 b.e. distanziatore super spacer (warm edge)
    U g-value = 1.1 W/(m2K)
    g -value = 65 %

  • 0,36
  • EN 13829 - q50 » (en m3/h.m3)


    • Others
    • Other hot water system
    • Others
    • Free-cooling
    • Double flow heat exchanger
    • Solar photovoltaic

    Nilan, Compact P
    7 compact system units, HRE 85% plus split systems to cover possible internal gains and peak loads (the last apartment has only HRMV and a split system unit)

    Heating installation
    compact system

Construction and exploitation costs

  • 930 000

Reasons for participating in the competition(s)


Building candidate in the category

Health & Comfort

Health & Comfort

Users' Choice

Users' Choice

Green Solutions Awards 2019 - Buildings

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Author of the page

Piero Russo

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Green Solutions Awards 2019 - Buildings