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

Dear, I have one more question, please. In ASHRAE 62.1-2010 section 6.4.1 there is an explantion about floor area to be ventilated.

Hi, Our project is mechanically ventilated by 100% OA constant volume enthalpy heat recovery ventilator.

We are deciding between the use of EN 15251 and the use of ASHRAE 62.1. Do you have experience in applying EN 13779–2007?

Multiple identical RTUs combined with plenum ducts serve a whole building. How can I prepare 62.1 MZcal? Can I add up cfm of all RTUs and assume it like one system using one sheet?

My Project has one FAHU on roof which is supply treated Fresh air to all AHU"s, And each AHU further supplies the mixture of outdoor air and Recirculated air to various zone via VAV (no reheating,