Posts Tagged ‘air tighness’

January 30, 2017

Air leakage in passive house: Causes and affects!

Air leakage through gaps in a building’s envelope can be caused by either the buoyancy effect of air or by the pressure differential created by wind blowing on a building. Typically both of these factors will influence the total rate of air leakage at a given point in time. Buoyancy As air warms up within […]...

AUTHOR: Petra Vladykova Bednarova

January 3, 2017

Airtight! Five steps to achieving Passivhaus on-site!

Airtight building envelope – step 4 Airtightness is central to the Passivhaus concept and the standards required go far beyond Part L (2010) requirements. A detailed air tightness strategy should…...

AUTHOR: Petra Vladykova Bednarova

October 5, 2016

What is Passive House Quality Assurance Champion?

In passive house construciton, a dedicated, on-site quality assurance champion in construction and quality assurance is the key person. The role of a dedicated, on-site Passive House Quality Assurance Champion…...

AUTHOR: Petra Vladykova Bednarova

August 24, 2016

History of ventilation: Extract air ventilation in detached houses, especially in northern Europe in 1970s!

Buildings started to be designed with increasingly more air-tight envelopes. To ensure the desired ventilation flows all year round, mechanical extract ventilation systems, and even supply and extract systems, also…...

AUTHOR: Petra Vladykova Bednarova

August 15, 2016

A holistic design approach for a passive house!

Passive house encourages designers to address all aspects of the design at an early design stage, including the types of materials/systems that will be used. A wholebuilding system approach i.e.…...

AUTHOR: Petra Vladykova Bednarova

March 29, 2016

DON´Ts when calculating and measuring air tighness in a passive house!

Air tighness in a passive house is a key element so don´t assume that something is sealed – always check. Calculate air changes using the ATTMA volume, the PHI institute…...

AUTHOR: Petra Vladykova Bednarova

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March 21, 2016

DO´s in passive house! Air barrier strategy!

When designing and building a passive house, air tighness is a major issue. So develop a froma air barrier strategy at the very beginning. Appoint or nominate a quality assurance…...

AUTHOR: Petra Vladykova Bednarova

January 8, 2016

Air tightness measured as n50 or q50 for passive house: UK and Passivhaus methodology!

Passive house methodology (n50) states that the Passive house standard measures the Air Change Rate (ACH) @50Pa (the n50 measurement), or in other words the number of times the volume…...

AUTHOR: Petra Vladykova Bednarova

August 13, 2015

New case study building added! Högåsskolan in Knivsta!

A new passive house school was built in Knivsta (link to the case study Högåsskolan in Knivsta), about 50 km from Stockholm. The architect´s company designing the school was the…...

AUTHOR: Petra Vladykova Bednarova

July 20, 2015

Air leakage test with blower door in Knivsta, passive house

A passive house school in Knivsta needs to have a good air tightness (n50<0.6 h-1) to be certified as a passive house according the Passive House Institute and German definition…...

AUTHOR: Petra Vladykova Bednarova

February 3, 2014

Swegon Air Academy in Estonia: Part 1 – Why to just build a passive house?

On November 22 in 2013 the Swegon Air Academy seminar on Modern and energy-saving concept in a small residential buildings took a place in Tallinn, Estonia. The first speaker was…...

AUTHOR: Petra Vladykova Bednarova