We are going to demonstrate the compliance with the prerequisite using OPTION 2. CEN STANDARDS EN 15251–2007 AND EN 13779–2007.

I've found another buggy in this calculator. In worksheet 'SZU', the column 'L' doesn't make the calculation to find 'Voz', always is empty. Did another user find this error?

Hi All,

We are dealing with an educational building and we are considering ASHRAE 62.1-2010. Inside there is an infirmary.

Which occupancy category shall I consider for that space?

Hi, I would like to know if minisplit (non-ducted) units have to comply with Standard 62.1-2010, Section  5.8, "...p0articulate filters or air cleaners with a minimum efficiency reporting valu

Can a mechanically conditioned space be naturally ventilated? I mean, is this combination allowed by ASHRAE 62.1-2010 and ASHRAE 55-2010?

Dears, When we have a Naturally Ventilated Space, we can use an alarm to indicate that the openings are close. Someone know if I can use an light alarm? or I must use an sound alarm?

For a Multi-Fam Highrise, the corridors will be heated with a ducted roof-top gas furnace split dx system will be installed.

Referring to the FAQs fan-assisted ventilation in naturally ventilated spaces can be considered as mechanical ventilation.

The new calculator (v2009v4_Minimum IAQ Performance Calculator_v03) from the Resources tab, does not count the ‘Zone Outdoor Airflow’ (column N) and it shows 0,00 no matter what system and values w