About this sheet
- This sheet is designed to determine the volume of airflow required to meet the ASHRAE 62.2-2013 whole building ventilation requirement.
- There is a tab at the bottom of the page that links to a report sheet that can be completed and signed to document the system.
- The "Exist.Adjusted whole building CFM cells displays the ventilation requirements for existing buildings adjusted for existing fans, windows and infiltration credit.
- It displays required ventilation when the building is tightened , calculates theACH50,ACHnatural,calculates the 'N' factor and the target CFM50 for .35 ACH Natural
- Note that the 'N'factors are based on ASHRAE'S TYM 3 weather data, and the number of stories of the building.
- If Macros are active, select "Clear Entries " to clear all the entry fields.
How to Use this Sheet ?
- Select the State or Province.
- Select a Weather Station.
- Enter the Square footage of the House.
- Enter the number of bedrooms or number occupants-1 ,whichever is more.
- Select the number of floors.
- Enter the blower door CFM50 on single family units .(No entry for multi family units )
Existing Building Adjustment :-
Note :- Calculation assumes that if there is no entry for a window or fan in the kitchen, the existing building calculations are not being used.
- The "Finish" column allows you to adjust the fan sizes to achieve a '0' CFM deficit.
- Select "Yes" or "No" for window in the Kitchen.
- Enter the measured fan CFM in the Kitchen.
- Select "Yes" or "No" for window in the bathroom.
- Enter the measured fan CFM in the bathroom e.t.c.
Note that for intermittent control, click the intermittent control tab.
Click on the report control tab for a printable report version of the data.
All information with PINK fill is generated automatically.
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