REVIEWED-RESUB 1-BLD2023-0071+Energy+5.6.2023_3.01.46_PM+3529324STATg
� L
RESUB
May OS 2023
CODE:
SECTION:
QUESTION 1:
Washington State Building Code Council
Improving the built environment by promoting health, safety and welfare
1500 Jefferson Street SE • P.O. Box 41449 • Olympia, Washington 98504
(360) 407-9277 • e-mail sbcc@des.wa.gov • www.sbcc.wa.gov
STATE BUILDING CODE OPINION NO. 20-11
2018 Washington State Energy Code, Residential
Table R406.2, Fuel Normalization Credits
BLD2023-0071
............................:
REVIEWED
BY
CITY OF EDMONDS
BUILDING DEPARTMENT'
Does fuel normalization credit system type 2 apply for a PTAC HP that meets
minimum federal standards?
ANSWER 1: No. PTAC units would be considered system type 5, Other, since they are not
listed in the equipment efficiency tables [C403.3.2(1)C; C403.3.2(2)] cited by
system type 2. To be considered system type 2, through the wall heat pumps
would need to meet all requirements in the referenced tables C403.3.2(1)C
and C403.3.2(2), including HSPF rating and listing per AHRI 210/240.
QUESTION 2: Does fuel normalization credit system type 2 apply to central ducted residential
heat pumps that meet minimum federal standards when used with supplemental
gas heating meeting the requirements of Section R403.1.2?
ANSWER 2: Yes, when installed per Section R403.1.2 with controls that prevent
supplemental heater operation above 40°F. At final inspection the auxiliary
heat lock out control shall be set to 350F or less.
QUESTION 3: What fuel normalization credit is taken if the electric resistance heat does not
exceed 2 kW per dwelling?
ANSWER 3: For single-family, duplex and townhouse dwellings, system type 4, as it
references those systems meeting Section R403.7.1 including the exception
for total installed electric resistance heating not exceeding 2 kW per dwelling,
would apply. For R-2 dwellings, it would be system type 3.
SUPERSEDES: None
REQUESTED BY: Kitsap County