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7.A. - Page 195 of 285 2019 Nonresidential New Construction Reach Code Cost Effectiveness Study
<br />Figure 12. Small Hotel HVAC and Water Heating System Costs
<br />Climate Zone
<br />Mixed Fuel
<br />Baseline
<br />All Electric System
<br />Incremental cost
<br />for All -Electric
<br />CZ01
<br />$2,337,531
<br />$1,057,178
<br />$(1,280,353)
<br />CZ02
<br />$2,328,121
<br />$1,046,795
<br />$(1,281,326)
<br />CZ03
<br />$2,294,053
<br />$1,010,455
<br />$(1,283,598)
<br />CZ04
<br />$2,302,108
<br />$1,018,675
<br />$(1,283,433)
<br />CZ05
<br />$2,298,700
<br />$1,015,214
<br />$(1,283,486)
<br />CZ06
<br />$2,295,380
<br />$1,011,753
<br />$(1,283,627)
<br />CZ07
<br />$2,308,004
<br />$1,026,029
<br />$(1,281,975)
<br />CZ08
<br />$2,333,662
<br />$1,053,717
<br />$(1,279,946)
<br />CZ09
<br />$2,312,099
<br />$1,030,355
<br />$(1,281,744)
<br />CZ10
<br />$2,354,093
<br />$1,075,348
<br />$(1,278,745)
<br />CZ11
<br />$2,347,980
<br />$1,068,426
<br />$(1,279,554)
<br />CZ12
<br />$2,328,654
<br />$1,047,660
<br />$(1,280,994)
<br />CZ13
<br />$2,348,225
<br />$1,068,858
<br />$(1,279,367)
<br />CZ14
<br />$2,345,988
<br />$1,066,263
<br />$(1,279,725)
<br />CZ15
<br />$2,357,086
<br />$1,079,241
<br />$(1,277,845)
<br />CZ16
<br />$2,304,094
<br />$1,019,973
<br />$(1,284,121)
<br />3.3.2 Infrastructure Impacts
<br />Electric heating appliances and equipment often require a larger electrical connection than an equivalent
<br />natural gas appliance because of the higher voltage and amperage necessary to electrically generate heat.
<br />Thus, many buildings may require larger electrical capacity than a comparable building with natural gas
<br />appliances. This includes:
<br />♦ Electric resistance VAV space heating in the medium office and common area spaces of the small
<br />hotel.
<br />♦ Heat pump water heating for the guest room spaces of the small hotel.
<br />3.3.2.1 Electrical Panel Sizing and Wiring
<br />This section details the additional electrical panel sizing and wiring required for all -electric measures. In an
<br />all -electric new construction scenario, heat pumps replace packaged DX units which are paired with either
<br />a gas furnace or a hot water coil (supplied by a gas boiler). The electrical requirements of the replacement
<br />heat pump would be the same as the packaged DX unit it replaces, as the electrical requirements would
<br />be driven by the cooling capacity, which would remain the same between the two units.
<br />VAV terminal units with hot water reheat coils that are replaced with electric resistance reheat coils
<br />require additional electrical infrastructure. In the case of electric resistance coils, the Reach Code Team
<br />assumed that on average, a VAV terminal unit serves around 900 ft2 of conditioned space and has a
<br />heating capacity of 5 kW (15 kBtu/hr/ft2). The incremental electrical infrastructure costs were determinec
<br />based on RS Means. Calculations for the medium office shown in Figure 13 include the cost to add
<br />electrical panels as well as the cost to add electrical lines to each VAV terminal unit electric resistance coil
<br />in the medium office prototype. Additionally, the Reach Code Team subtracted the electrical
<br />infrastructure costs associated with hot water pumps required in the mixed fuel baseline, which are not
<br />required in the all -electric measures.
<br />20 © 2019-07-25
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