62.1-2013 COMPLY-DOAS

"Quick and Easy" Calculation Programs and "Optimization" Procedures for compliance with ASHRAE Standard 62.1-2013 DOAS, "Ventilation Rate Procedure".  Dedicated Outdoor Air System (DOAS) is used to supply outdoor air directly to the building zones to satisfy occupant ventilation requirements.  Psychrometric calculations are included, based on project location weather data (USA and International weather data included), and provide recommended supply air conditions to offset internal latent loads.

"Optimization" routines identify worst-case zone(s) latent load and increase air quantity to the critical zone(s), which can significantly reduce required DOAS coil load.

Contents

62.1-2013 Comply-DOAS Package includes over (8) Programs, Tables, and Forms that make Compliance with the ASHRAE 62.1-2013 "Ventilation Rate Procedure" very straightforward and fast ("Quick and Easy").  Click the adjacent image for a full size view of the Contents Page of the 62.1-2013 Comply-DOAS Software Package.  (Click Image to enlarge)

Note: Portions of the programs, tables, and design information include excerpts from ANSI/ASHRAE 62.1-2013: "© 2013 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (www.ashrae.org) Used by permission."

Project Information

The "Basic Project Information" form should be the first Form to be completed for every project.  Project information that is inserted in this Form is automatically transferred to other Programs for use in calculations and for documenting project data.  (Click Image to enlarge)

Calculations Take-off Form

Outdoor Air Requirement Calculations

The purpose of ANSI/ASHRAE Standard 62.1-2013 is to specify the minimum ventilation rates and indoor air quality that will be acceptable to human occupants, and which is intended to minimize the potential for adverse health effects.  These Software Programs calculate the required Outdoor Air Quantity for each Air Handling System, based on Space Type/Application, Occupancy Level, and Floor Areas.  (Click Image to enlarge)

DOAS Supply Air Temperature Calculations

Below the “Required Outdoor Air Intake Flow” results and on the “DOAS-Loads” sheet are a series of psychrometric-based calculations, to help determine the recommended Supply Air Discharge Temperature.  The calculations are based on the Occupant (and Miscellaneous) Latent load for the air handling system.  The resulting SA temperature is determined by psychrometric calculations of: the Design Outdoor Air conditions (DB and WB) at the project location; the anticipated occupant latent load, based on the occupancy classification (expected activity level) and the total number of occupants; humidity ratio difference required to offset occupant latent load; psychrometric evaluation of the resulting saturated wet bulb (WB) temperature, using elevation-corrected factors for the project location; and the Total Heat requirement of the cooling coil based on the Enthalpy difference between the Design Outdoor conditions (minus Energy Recovery Wheel enthalpy reduction, if applicable) and the calculated Supply Air Discharge Temperature (Saturated Air Condition).

"Optimization" routines perform multiple iterations to improve supply air conditions to latent-load critical zones.  Outdoor air quantity is increased to the worst-case zone, based on internal latent loads, which may then make another zone the new worst-case zone.  OA is then increased to the new critical zone, etc..  This Optimization can significantly reduce the Total Load on the DOAS unit, since the required supply air enthalpy difference is reduced as the "drier" OA quantity is increased to the critical zone(s).  The final supply air condition is established to maintain the designed space relative humidity.
          

Compliance Documentation

Compliance Documents can be printed after completing the calculations and can be submitted as a Compliance Record to the appropriate Building Department or Code Authority. It is recommended that the following Output Pages, Assumptions, and Diagrams be printed out, to assist with Building Department review:

1. Printout of Air Handling Unit calculation results for each air handling system (Note: number of printout pages for each air handling system will depend on the number of zones) (Click Image to enlarge)
2. Copy of "Calculation and Design Assumptions"
3. Table 6-1, Minimum Ventilation Rates In Breathing Zone
4. Table 6-2, Zone Air Distribution Effectiveness
5. Ventilation System Schematic Diagram

Portions of these documents are "© 2013 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (www.ashrae.org) Used by permission."

(Click Image to enlarge)

Tables, Diagrams, and Forms

Before beginning input and calculations, the following Input Forms, Tables, and Diagrams can be printed out, to assist with data assembly:

1. Calculations Take-off Forms (Multiple copies for air handling systems with more than 12 zones)
2. Table 6-1, Minimum Ventilation Rates In Breathing Zone
3. Typical Zone Occupancy Take-off table and diagram
4. Table 6-2, Zone Air Distribution Effectiveness
5. Zone Air Distribution Effectiveness diagrams
6. Ventilation System Schematic
7. Copy of "Calculation and Design Assumptions"

Portions of these documents are "© 2013 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (www.ashrae.org) Used by permission."

   (Click any image to enlarge)

Disclaimer of Liability for ASHRAE, Inc.

In no event will ASHRAE (or American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.) be liable for any damages arising out of the use or inability to use the 62.1-2013 Comply programs or accompanying documentation, however caused and on any theory of liability.

Prices/Orders

All of the above Programs, Forms, and Extras are included in the 62.1-2013 Comply-DOAS Package.  Order now to assure that you will receive the low "Limited Time Special Prices".  Available in I-P (Inch-Pound) units.  Go to the Prices/Orders page for details.