User manual

FAQ for CBECC-Res 2013

2. My CF1R is reporting slab edge insulation when I did not model any. Can I fix this?

Yes. Check the  slab has edge insulation box, set the R-value and depth to none, and then uncheck

slab has edge insulation (make sure in the process of doing this it did not switch it to a heated slab).

3. The check box to “Use this EER” sticks in the checked position. How can I get it to shut off when I

am specifying a default value?

You have probably typed in the value, so that even if it is the default value, the program is detecting

a user-defined value. With the  use this EER box checked, swipe the cursor across the EER field,

right-click, pick restore default, and then uncheck the box.

4. If a building has heating only, is HERS verified fan efficacy required? How do I model the correct

requirement?

No it is not required for most systems when there is no cooling (there may be a requirement

involving certain central fan integrated systems). When correctly modeled with no cooling system

(or any system for which fan efficacy does not apply such as non-ducted systems), you can set the

fan to none.

5. Is there any way to get the Overhangs and Fins section of the CF1R to not print on the CF1R (since

I did not model any)?

Yes. For any windows for which you have not modeled overhangs, uncheck the  Model Window

Fins and/or Overhangs box on the windows input screen and this table (or the rows for any windows

without overhangs/fins) will not appear.

FAQS POSTED ON DECEMBER 2, 2014

1. When I have a building with no cooling system, is it acceptable to show this as “none” or 0

systems?

Neither of these options will run. The correct way to model a dwelling with no cooling system is

documented in Section 8.3.2 of the User Manual. If a file previously ran with none, your compliance

results will not change due to this change. There are no HERS requirements associated with no

cooling (now that all the kinks are worked out for this feature).

2. If I have a 2-zone single-family residence and each zone has a tankless water heater, is it

appropriate to specify the same water heating system (with one tankless unit) in each zone? Will

that result in two tankless units being specified?

No, this would only reflect one system with one water heater. Because water heating applies to a

dwelling unit and not to a zone, the system should be set up to include both tankless water heaters

(assuming they have the same distribution system) and associate that system with one or both

zones.

Alternatively, identify two distinctly named water heating systems, each with one water heater, and

specify one system per zone. Either option yields the same results.

3. Is there any limit to the number of multi-family dwelling units that can be modeled?

The limits on multi-family were raised with Version 3b, however one limit remains. If dwelling units

have individual water heating rather than a central DHW system, there is a limit of 100 systems.