Duct leakage is detrimental to indoor air quality (IAQ), comfort, and energy efficiency. It is often accompanied by other problems, such as inferior commissioning and cleaning. Airtight circular (round) ductwork is known to have many other benefits over rectangular ductwork, including cost. But why do designers, installers, and building owners forego airtight duct systems- It is due to: (i) lack of awareness of the benefits, (ii) lack of performance requirements and penalties for noncompliance, and (iii) no one is found accountable, as there is no commissioning.
Post date: 18 Mar 2010
Post date: 7 Mar 2010
Post date: 24 Feb 2010
Finland has set minimum requirements in the National Building Code for
thermal insulation and ventilation of new buildings since 1976. The
requirements have been changed several times in order to improve energy
efficiency in buildings.
The changes have been made in 2003, when the level of the requirements
was tightened by 25-30%, and in 2007, when the requirements were
changed because of the implementation of the EPBD. The latest tightened
(-30%) requirements were given on December 2008 and will come into
force in the beginning of 2010.
Post date: 7 Gen 2010
REHVA Journal. Volume 45, Issue 4, December 2008, pages 22-24 and 26-28
Post date: 29 Lug 2009
REHVA Journal. Volume 45, Issue 4, December 2008, pages 48-53
Post date: 28 Lug 2009