Consultancy Service for Low-Energy, Net Zero & Passivhaus Buildings.

High-level support for architects, developers and local authorities. We combine building physics, 2D & 3D Passivhaus modelling, and advanced simulations to help you design buildings that are efficient, resilient and compliant.

  • Passivhaus modelling (PHPP)

  • Hygrothermal simulation (WUFI)

  • 2D &3D thermal bridge modelling

  • Risk of overheating

  • Airtightness strategy development

  • Envelope and energy efficiency consultancy

Request
technical consultancy

Consultancy

What is included in our
energy consulting

  • Passivhaus Modelling and Optimisation (PHPP)

    • DesignPH and PHPP

    • Energy balance and envelope optimisation

    • Shading & solar gain analysis

    • Airtightness strategy development

    • Overheating analysis (PHI criteria / TM59)

  • Building Physics & Performance Simulation

    • Hygrothermal simulation (WUFI)

    • 2D and 3D thermal bridge modelling

    • Condensation & mould risk analysis

    • Summer comfort and overheating risk

  • Low-Energy & Net Zero Building Consultancy

    • Optimisation of construction solutions

    • Cooling strategies for hot climates

    • Expert reports and technical opinions for disputes and litigation.

    • 3D design and calculation of mechanical ventilation systems

    • Carbon footprints and LEED

Benefits

Benefits of the Zepassiv consultancy

  • Risk reduction in the design phase

  • Achieve Passivhaus & Net Zero standards

  • Improve comfort & minimise energy demand

  • Avoid costly changes on site

  • Expert technical team with +20 years of experience

    • Request
    technical consultancy

CLIENTES

Con quién
work with

  • Architectural studios

  • Engineering

  • Construction companies

  • Local Authorities & Public Sector

  • Demanding developers

METODOLOGÍA PROPIA

Our
process

Request
technical consultancy

  • Initial analysis and feasibility studies

  • PHPP / WUFI / thermal bridges modelling

  • Technical workshop with the design team

  • Optimisation of solutions

  • Support in
    specification

  • Support
    during the work

Request
technical consultancy

ZEPASSIV

Why choose
Zepassiv?

  • International experience in Passivhaus projects and high efficiency buildings

    More than two decades working in Spain, UK and Portugal, with residential, public and private projects.

  • Passivhaus, EnerPHit and energy efficiency certified consultants

    Multidisciplinary team proficient in PHPP, WUFI, Flixo/IES VE, TM59, comfort analysis and building physics.

  • Fully collaborative approach

    We work side by side with architects, engineering and construction companies, facilitating technical decisions in all phases of the project and assisting on site.

  • Risk reduction by design

    We identify thermal bridges, damp, overheating and construction problems before they appear on site.

  • Cost and performance optimisation

    We propose viable, efficient solutions aligned with energy objectives, regulations and certification (Passivhaus, EnerPHit, AECB, Net Zero).

  • Trilingual service (ES / EN / PT)

    We facilitate communication in international teams or cross-border projects. Zepassiv is active in 15 countries.

Portfolio

Some of our
recent projects

Find out how to Zepassiv accompanies professionals on the
development of sustainable projects and Passivhaus certificates.

Accredited vocational training to transform the sector.

As certified consultants and trainers, we believe that training is key to driving real change. Our programmes help professionals to successfully apply Passivhaus principles in their projects.

Discover our training

Testimonials

What they say
OUR CLIENTS

  • With Zepassiv we were able to certify our first Passivhaus project in an agile and uncomplicated way.

    Architect

    United Kingdom

  • Its bilingual team greatly facilitated international coordination.

    Promoter

    Spain

  • Its bilingual team greatly facilitated international coordination.

    Architect

    United Kingdom
  • Read more testimonials

FAQs

Frequent
questions

It is a technical service that analyses the energy, thermal and hygrothermal performance of the building, optimising design, materials and systems to meet high efficiency standards.

Yes. Consulting helps to reduce energy consumption, improve comfort and prevent construction defects, regardless of the certification.

PHPP for energy modelling, WUFI for hygrothermal analysis, Flixo/THERM for thermal bridges and TM59 for overheating.

Yes. We join the technical team to support the design and implementation.

Yes. We carry out site visits, check details and provide support with airtightness and quality strategies.

Sí trabajamos en Latinoamérica también.