The Passive House Standard: How to achieve optimum air quality

  • 4 Aug 2015

The Passive House Standard focuses on delivering maximum air comfort and quality via post-heating or post-cooling the fresh air flow, without air recirculation.

To achieve the standard in a central European climate, a certain criteria must be followed from the planning process’ outset.

Passive House criteria

Space heating and cooling demand

All Passive House buildings should be able to achieve an annual heating and cooling demand of 15KWh/m2 per year – it should not exceed this.

Alternatively, a Passive House’s peak heat load must be below 10W/m2. 

Primary energy demand

Overall, the primary energy consumption for heating, cooling, domestic hot water and auxiliary and household electricity must not surpass 120kWh/m2 per year.

Passive House homes offer optimum air quality, maximising comfort for their occupants


A Passive House building must not leak more air than 0.6 times the house volume per hour.

If airtightness is not incorporated into the design of the building from the start, it is unlikely that it will obtain the Passive House Standard.

The criteria have been designed to ensure the delivery of low energy consumption, longevity and healthy air.

In addition to offering these benefits, a Passive House should be environmentally friendly and largely affordable.

The criteria are a logical process, working together to achieve the benefits. These guidelines should not be looked as a menu of mix and match options.

Delivering a Passive House

To obtain certification to the Passive House standard, it is recommended that designers seek the assistance of the Passive House Planning Package (PHPP).

Factors, such as solar design and landscape, should also be assessed.

High quality materials and fabrics should be used in the construction of the home, in order to ensure efficient thermal insulation and the elimination of thermal bridges.

Advanced window technology is also useful; meanwhile, mechanical heat recovery ventilation systems (MVHR) should be researched thoroughly to ensure that air quality and comfort is optimised.

Zehnder Group UK Ltd
Unit 4, Watchmoor Point
GU15 3AD

01276 605800

Visit Zehnder Group's website

Leave a Reply

Latest news

Wetherby Building Systems

Wetherby working with leading brands for TotalWall System

Wetherby Building Systems Ltd, a market leader in External Wall Insulation systems, has teamed up to work with three other leading industry brands to unveil the TotalWall | Fire Tested System.

Posted in Articles, Building Industry News, Building Products & Structures, Building Regulations & Accreditations, Facades, Innovations & New Products, Insulation, Research & Materials Testing, Walls


VELUX rewards scheme offers up to £35 for purchases this spring

Construction industry professionals and homeowners across the UK and Ireland can benefit from an extra rewards boost this spring, thanks to roof window manufacturer VELUX®.

Posted in Articles, Building Industry Events, Building Industry News, Building Products & Structures, Glass, Glazing, Restoration & Refurbishment, Retrofit & Renovation, Roofs, Windows


Axion Polymers: Women should consider careers in recycling

At Axion Polymers, women hold key roles in a number of areas from management and finance to process engineering and laboratory research. Find out more here…

Posted in Articles, Building Industry News, Building Products & Structures, Building Services, Facility Management & Building Services, news, Posts, Site Preparation, Sustainability & Energy Efficiency, Waste Management & Recycling


Sandtex adds colour to Hull murals

Crown Paints played its part in the addition of four murals across Hull in 2020 by donating Sandtex Trade products in various colours to local artist Andy Pea.

Posted in Articles, Building Industry Events, Building Industry News, Building Products & Structures, Case Studies, Charity work, Interior Design & Construction, Interiors, Paints, Paints, Coatings & Finishes, Restoration & Refurbishment, Retrofit & Renovation, Walls