The document discusses requirements for HVAC systems and components in commercial buildings. It specifies that HVAC equipment must meet minimum efficiency standards in various climate zones to qualify for eliminating economizer requirements. Controls are required to prevent simultaneous heating and cooling and allow temperature setbacks. Ducts and piping must be insulated meeting certain standards. Air systems over 10,000 CFM must have balancing dampers.

1. 40 ANSI/ASHRAE/IES Standard 90.1-2010 (I-PEdition)
g. The shall becontrolledby a changeoveror
dual .
h. If a heat pump equipped with auxiliary internal
heaters is installed, shall be provided
that prevent supplemental heater operation when the
heating load can be met by the heat pump alone during
both steady-state operation and recovery. Sup-
plemental heater operation is permitted during outdoor
coil defrostcycles. The heatpumpmustbecontrolledby
either (1) a digital or electronic designed for
heat pump use that energizes auxiliary heat only when
the heat pump has insufficient capacity to maintain
orto warmupthe atasufficientrate or(2) a
multistage and an
wired to energize auxiliary heat only on the last
stage of the and whenoutside air tem-
perature is less than40 F. Heatpumps whose minimum
is regulated by NAECA and whose ratings
meet the requirements shown in Table 6.8.1B and
include all usage of internal heating
are exempted from the requirements of this part
(Section6.3.2[h]).
i. The shall not permit reheat or any other
form of simultaneous heating and cooling for humidity
.
j. serving other than hotel/motel guest
rooms, and other than those requiring continuous oper-
ation, which have both a cooling or heating capacity
greaterthan15,000 Btu/handasupply fanmotorpower
greater than 0.75 hp, shall be provided with a time
clockthat(1) canstartand stop the underdiffer-
ent schedules for seven different day-types per week,
(2) is capable of retaining programming and time set-
ting during a loss of power for a period of at least ten
hours, (3) includes an accessible override that
allows temporary operation of the for up to two
hours, (4) is capable of temperature down to
55 Fduring off hours, and(5) iscapable of temperature
setup to 90 Fduring off hours.
k. Exceptforpipingwithin units,HVACpip-
ing shall be insulated in accordance with Tables 6.8.3A
and6.8.3B. Insulationexposedto weathershall besuitable
for outdoor service, e.g., protected by aluminum, sheet
metal, paintedcanvas, orplastic cover. Cellularfoaminsu-
lationshall beprotectedasaboveorpaintedwithacoating
that is water retardant and provides shielding from solar
radiation.
l. and shall be insulated in accordance
with Tables 6.8.2A and 6.8.2B and shall be sealed in
accordance withSection6.4.4.2.1.
m. shall require a ducted
to be air balanced in accordance with industry-
accepted procedures.
n. intake and exhaust shall meet the
requirementsof Section6.4.3.4.
o. Where separate heating andcooling serves the
same temperature zone, shall be interlocked
to preventsimultaneousheating andcooling.
p. with a design supply air capacity greater than
10,000 cfmshall have
q. The shall comply withthe
requirementsinsection6.4.3.9.
6.4 Mandatory Provisions
6.4.1 Equipment Efficiencies, Verification, and Label-
ing Requirements
6.4.1.1 Minimum Equipment Efficiencies Listed
Equipment StandardRatingandOperatingConditions.
showninTables6.8.1A through6.8.1Kshall have
a minimum performance at the specified rating conditions
when tested in accordance with the specified test procedure.
Where multiple rating conditions or performance require-
ments are provided, the shall satisfy all stated
requirements, unless otherwise exempted by footnotes inthe
table. covered under the Federal Energy Policy
Act of 1992 (EPACT) shall have no minimum
requirementsforoperationatminimumcapacityorotherthan
standard rating conditions. used to provide water
heating functionsaspartof acombination shall satisfy
all stated requirements for the appropriate heating or
cooling category.
Tables are as follows:
a. Table 6.8.1A AirConditionersandCondensing Units
b. Table 6.8.1B HeatPumps
c. Table 6.8.1C Water-Chilling Packages (see Section
6.4.1.2 for water-cooled centrifugal water-chilling pack-
agesthataredesignedto operateatnonstandardconditions)
d. Table 6.8.1D Packaged Terminal and
andHeatPumps
e. Table6.8.1E Furnaces, DuctFurnaces, andUnitHeaters
TABLE 6.3.2 Eliminate Required Economizer for
Comfort Cooling by Increasing Cooling Efficiency
Climate Zone Efficiency Improvementa
2a 17%
2b 21%
3a 27%
3b 32%
3c 65%
4a 42%
4b 49%
4c 64%
5a 49%
5b 59%
5c 74%
6a 56%
6b 65%
7 72%
8 77%
aIfaunitisratedwithanIPLV,IEERorSEERthentoeliminatetherequiredairor
, the minimumcooling efficiency of the HVACunitmustbeincreased
bythepercentageshown. If theHVACunitisonlyratedwithafull loadmetric like
EER cooling thenthese mustbe increased by the percentage shown.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (www.ashrae.org).
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