User manual

FAQ for CBECC-Res 2013

always requires HERS verification of the mandatory indoor air quality requirements and typically has

mandatory duct leakage testing. An addition may not require HERS verification if:

(A) It is < 1,000 ft

addition (no IAQ verification),

(B) An existing HVAC system with < 40 linear feet of new ducts provides conditioning to the

addition (no duct testing), or

testing).

If you cannot delay your project, you may reference the appropriate exceptions:

EXCEPTION 1 to Section 150.2(a): Additions 1,000 square feet or less are exempt from the ASHRAE

Standard 62.2 Section 4 requirements to provide whole-building ventilation airflow as referenced by

Section 150.0(o), however all other applicable requirements of ASHRAE Standard 62.2 as referenced

by Section 150.0(o) shall be met by the addition.

EXCEPTION 4 to Section 150.2(a): Space-Conditioning System. When heating or cooling will be

extended to an addition from the existing system(s), the existing heating and cooling equipment

need not comply with Part 6. The heating system capacity must be adequate to meet the minimum

requirements of CBC Section 1204.1.

EXCEPTION 2 to Section 150.2(b)1E: Duct Sealing. Duct systems with less than 40 linear feet in

unconditioned spaces as determined by visual inspection.

6. When I opened an existing input file, I am getting a message that indicates my file might not run.

Is that true? [This answer has been expanded from the May 7 FAQ.]

Because there have been so many changes to the software inputs, maintaining the ability to run

older files is a challenge. Pick “Resolve NotInput Issues,” choose Yes to the option to “remove user

input from all. . . “ and click “Done.” Make a note of where the problem area is in case the file still

does not run or to check how the file was modified to get it to run. You might need to redefine one

or more components.

7. When I tried to run the new option for an air to water heat pump, it would not run. Am I doing

something wrong?

At the present time, the limit to this new option is that you cannot run this equipment type with

multiple orientations. So until we get this bug fixed, run a single orientation.

8. I was using one of the new tool options to “Generate . . . Equipment Report Records” for HVAC,

DHW, or IAQ and now I cannot run my input file. Is there any way to fix this?

Yes. Until we get this bug fix approved, proceed until you can close the program and then open the

*.ribd file in notepad (the file is in the My Documents . . . Projects folder [right-click and select open

with notepad]). Search for the phrase ‘SysRpt’ and delete the 3-5 rows associated with SysRpt,

including the “. . “ and save the file. Then open the program again and it should run.

FAQS POSTED ON MAY 7, 2014

1. When I opened an existing input file, I am getting a message that indicates my file might not run.

Is that true?

Because there have been so many changes to the software inputs, maintaining the ability to run

older files is a challenge. Make a note of where the problem area is in case the file does not run or