CS91 Energy Code Feasibility Study in Brockton, Massachusetts

Exterior Walls

≥ R-21 cavity insulation (2x6 @ 16" o.c.) with ≥ R-10 continuous exterior insulation.

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

Roof

Sealed attic: ≥ R-30 insulation + ≥ R-30 continuous insulation.

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

Windows & Glass Doors

High performance, U ≤ 0.15 / SHGC ≤ 0.20.

High performance, U ≤ 0.25 / SHGC ≤ 0.25.

High performance, U ≤ 0.25 / SHGC ≤ 0.25.

DHW

Electric resistance storage water heater; UEF ≥ 0.93; 50 gal.

1-Bedroom: Split-system heat pump water heater (HPWH); UEF ≥ 3.88; 40 gal
2-Bedroom: Split-system heat pump water heater (HPWH); UEF ≥ 3.88; 50 gal
3-Bedroom: Split-system heat pump water heater (HPWH); UEF ≥ 3.88; 65 gal

1-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 40 gal
2-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 50 gal
3-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 65 gal

Clothes Washer

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 105 kWh/yr; electric.

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 152 kWh/yr; electric.

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 152 kWh/yr; electric.

Clothes Dryer

Heat pump dryer; ventless; CEF ≥ 8.5.

Heat pump dryer; ventless; CEF ≥ 6.

Heat pump dryer; ventless; CEF ≥ 6.

Stove / Oven

Electric induction cooktop; convection oven.

Electric range.

Electric range.

Cost $/sf

$62.82

$62.21

$61.32

Incentive $/sf

$2.28

$2.82

$2.28

Net $/sf

$61.18

$60.38

$60.29

1-Bedroom

1.4

0.9

0.0

2.0

3.3

1.8

9.4 @ 9°F

10.0 @ 5°F

2-Bedroom

3.9

0.6

0.0

3.2

4.8

2.4

14.9 @ 9°F

15.9 @ 5°F

3-Bedroom

5.1

0.9

0.0

3.9

5.6

2.4

17.9 @ 9°F

19.1 @ 5°F

1-Bedroom

2.4

1.0

2.1

1.7

2.8

10.0

0.71

2-Bedroom

3.4

1.7

2.3

2.3

3.9

13.6

0.71

3-Bedroom

3.0

2.2

2.5

2.5

4.4

14.5

0.70

1-Bedroom

9.0 to 20.0 kBtuh rated

≥ 10.0 kBtuh @ 5°F

2-Bedroom

12.2 to 20.0 kBtuh rated

≥ 15.9 kBtuh @ 5°F

3-Bedroom

13.1 to 20.0 kBtuh rated

≥ 19.1 kBtuh @ 5°F

Climate zone

IECC 5A (2021 IECC map)

Program

ENERGY STAR MFNC National v1.2 Rev. 05

Rule

Design Review Item 2.1 / Fn 11-12; Proposed UA ≤ Reference UA

Code reference

Exhibit 1 Table 1 (2021 IECC CZ); Design Review Item 2.1 / Fn 11-12

Version basis

explicit program key (v1.2)

Note

Code minimum for this permit is v1.1; v1.2 used for explicit program key (v1.2). Confirm certification path matches the incentive or AHJ requirement. Reference wall U for wood-framed exterior walls is U-0.064 in Climate Zone 5 (Design Review Checklist Rev. 05 footnote 12.i). Proposed wall U stays the Ekotrope assembly U. Proposed U for walls, roof, windows, doors is the area-weighted Ekotrope assembly U. Any component without an Ekotrope U keeps the spec lookup. Proposed wall U 0.054 is the area-weighted Ekotrope assembly U (0.054). The v1.1 wood-framed-wall exception is the Reference U in this table (0.064), not a replacement for a better Ekotrope U. Reference wall U is U-0.064 for Group R wood-framed walls in Climate Zone 5 (Design Review Checklist Rev. 05 footnote 12.i). Basement envelope takeoffs: basement floor area matches roof (7,761 sf); foundation wall length and slab edge perimeter match the floor plate (2,270 lf); below-grade wall height 10 ft (ENERGY STAR MFNC v1.2 / conditioned basement).

Walls

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

Roof

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

Windows

High performance, U ≤ 0.25 / SHGC ≤ 0.25.

Doors

Opaque door, U ≤ 0.20 (R-5.0).

Slab

N/A - slab is below grade.

69

27,437

7,761

6,200

7,761

378

Opaque exterior walls

27,437 sf

0.064

1,756

0.064

1,756

Roof / ceiling

7,761 sf

0.020

153

0.024

186

Windows & glass doors

6,200 sf

0.250

1,550

0.270

1,674

Below-grade walls

3,780 sf

0.038

145

0.050

189

69

3,603

3,805

94.7%

PASS

Site total

3,603

3,805

94.7%

PASS

Exterior Walls

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

Below Grade Walls

N/A

Corridor Walls

N/A

Slab

N/A

Floor Over Unconditioned Space

N/A

Floor Over Garage

N/A

Floor Over Podium

N/A

Rim Joists

≥ R-21 rim/band insulation at floor transitions.

Roof

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

Windows & Glass Doors

High performance, U ≤ 0.25 / SHGC ≤ 0.25. (Product Rec).

Doors

Opaque door, U ≤ 0.20 (R-5.0).

Air Sealing

≤ 0.27 CFM50 per sqft of shell; tested. (Air Sealing Protocol)

HVAC

Ducted air-source heat pump; SEER2 ≥ 17.5; HSPF2 ≥ 10.5. See HVAC Design Loads. (Product Rec).

Ductwork

Supply and return ducts in conditioned space insulated to code minimum.

Duct Sealing

≤ greater of 80 CFM25 or 8 CFM25 per 100 sqft of conditioned floor area; tested at final. (Duct Sealing Protocol)

HVAC Grading

Fan Flow Test: Grade II
Watt Draw Test: Grade II
Refrigerant Charge: Grade I (weigh-in method)
HVAC installer must provide photo of the digital refrigerant scale showing the amount charged, with the tank on the scale and hoses connected to the outdoor unit, along with a photo of the outdoor unit's data plate.
If the non-invasive procedure in ANSI / RESNET / ACCA 310 is not permitted to be used during the final inspection of a unit (i.e., due to the equipment type or to outdoor air temperatures that do not meet the requirements of the non-invasive method), then the unit is permitted to be certified with a default refrigerant charge designation of Grade III. Note that in these circumstances, the weigh-in method procedure in ANSI / RESNET / ACCA 310 may still be used to pursue a Grade I designation.

Mechanical Ventilation

In-unit ERV (Product Rec).
1-bedroom: 70 CFM, ≥ 86% ASRE
2-bedroom: 90 CFM, ≥ 83% ASRE
3-bedroom: 90 CFM, ≥ 83% ASRE

Local Mechanical Exhaust

Bathroom(s): at least 50 CFM intermittent and up to 3.0 sones, or at least 20 CFM continuous and up to 2.0 sones.
Kitchen(s): at least 100 CFM intermittent and up to 3.0 sones, or continuous at 5 ACH.
Both: exhaust directly outdoors with ENERGY STAR certified fans. A balanced ERV or HRV serving the space may satisfy this requirement. The dwelling-unit balanced ERV is designed to satisfy this requirement.

Thermostats

Wi-Fi connected thermostat.

DHW

1-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 40 gal (Product Rec).
2-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 50 gal
3-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 65 gal

DHW Piping

Supply piping insulated to ≥ R-3.

Water Fixtures

WaterSense certified (Lavatory ≤ 1.2 GPM; Shower ≤ 2.0 GPM; Kitchen ≤ 2.2 GPM).

Refrigerator

≤ 600 kWh/yr; electric. (Product Rec).

Dishwasher

≤ 269 kWh/yr; electric. (Product Rec).

Clothes Washer

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 152 kWh/yr; electric. (Product Rec).

Clothes Dryer

Heat pump dryer; ventless; CEF ≥ 6. (Product Rec).

Stove / Oven

Electric range. (Product Rec).

Lighting

≥ 100% high-efficacy (LED).

Solar Ready

Exempt. A solar PV system is planned for installation on the building, exempting the project from solar-ready zone requirements.

EV Ready

At least 20% of parking spaces wired EV-ready (40-amp Level II; shared circuits with load management allowed).

HPWH Ready

N/A

Paperwork & Modeling

ENERGY STAR energy model to the target (per-unit HERS or whole-building ASHRAE path), the ENERGY STAR design-review checklist and multifamily workbook, and an HVAC design report.

Testing & Verification

ENERGY STAR field verification: pre-drywall and final inspections, unit air-tightness (blower door), duct-leakage, ventilation and exhaust airflow, and HVAC functional testing.

Exterior Walls

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

Below Grade Walls

≥ R-15 continuous insulation, or ≥ R-19 cavity insulation, or ≥ R-13 cavity + ≥ R-5 continuous insulation.
From the top of the basement wall to 10 ft below grade or the basement floor, whichever is less.

Corridor Walls

N/A

Slab

N/A

Floor Over Unconditioned Space

N/A

Floor Over Garage

N/A

Floor Over Podium

N/A

Rim Joists

≥ R-21 rim/band insulation at floor transitions.

Roof

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

Windows & Glass Doors

Fixed U ≤ 0.34.
Operable U ≤ 0.43.
SHGC ≤ 0.40.
ENERGY STAR MFNC Multifamily Reference Design, common-space windows, climate zone 5.

Doors

Glazed entrance U ≤ 0.60.
ENERGY STAR MFNC Multifamily Reference Design, common-space glazed entrance doors, climate zone 5.

Air Sealing

Continuous air barrier for these spaces.
Hallways, stairwells, and enclosed common spaces not greater than 1,500 sqft, verified by inspection.
225 CMR 23 C402.5.2.2

HVAC

Ducted split heat pump: HSPF2 ≥ 7.8 / SEER2 ≥ 15.2.
Ductless heat pump: HSPF2 ≥ 8.2 / SEER2 ≥ 16.
Ducted single packaged heat pump: HSPF2 ≥ 7.7 / SEER2 ≥ 15.2.
Ducted split cooling: SEER2 ≥ 13.3.
Ductless cooling: SEER2 ≥ 14.
Single packaged cooling: 5 percent better than ASHRAE 90.1-2019.
Electric resistance heat, where used, is not more than 12 kBtuh per enclosed space and has automatic thermostatic controls.
ENERGY STAR MFNC National Program Requirements v1.2 Rev. 05, Exhibit 1, Table 1 (2021 IECC Climate Zone 5) and Table 2.

Ductwork

Ducts and air handlers serving these spaces are in conditioned space.
A supply or return duct outside conditioned space is insulated to at least R-6.
ENERGY STAR MFNC Exhibit 1; HVAC Design Supplement for Common Spaces, Item 5.3.

Duct Sealing

Supply, return, and exhaust ducts and plenums serving these spaces are sealed at transverse joints, longitudinal seams, and duct wall penetrations.
ENERGY STAR MFNC HVAC Design Supplement for Common Spaces, Item 5.4.

HVAC Grading

N/A

Mechanical Ventilation

Outdoor air to the community space and the hallways, at the ASHRAE 62.1 Section 6 rate for that space.
The design rate is not more than 50 percent above the ASHRAE 62.1-2013 minimum.
The system runs automatically.
ENERGY STAR MFNC HVAC Design Supplement for Common Spaces, Items 2.1 and 2.12.

Local Mechanical Exhaust

N/A

Thermostats

Programmable thermostat.
ENERGY STAR MFNC Multifamily Reference Design, Exhibit 1.

DHW

Common-space electric service water heating: UEF ≥ 0.93 (ENERGY STAR MFNC v1.2 Rev. 05, Exhibit 1, Table 2 — Common Space Electric Efficiency).

DHW Piping

N/A

Water Fixtures

N/A

Refrigerator

N/A

Dishwasher

N/A

Clothes Washer

N/A

Clothes Dryer

N/A

Stove / Oven

N/A

Lighting

100% LED.
Community space 0.59 W/sqft.
Hallways 0.41 W/sqft.
Basement storage 0.38 W/sqft.
Maintenance and electrical rooms 0.43 W/sqft.
IECC 2021 Table C405.3.2(2)

Lighting Controls

Occupant sensors in the community space, hallways, and basement storage.
Hallway sensors reduce lighting to not more than 50 percent of full power within 20 minutes after the corridor is empty.
Interior exit stairways are exempt from lighting controls.
Daylight-responsive controls where general lighting exceeds 100 W in a primary sidelit zone, 300 W in a sidelit zone, or 100 W in a toplit zone.
IECC 2021 C405.2.1.4
225 CMR 23 C405.2.4

Solar Ready

Exempt. A solar photovoltaic system is planned for this building.

EV Ready

20% of parking spaces EV-ready.
40-amp dedicated branch circuit, or a larger branch circuit with automatic load management.
Wiring suitable for 6.6 kW or higher Level II EVSE, run to within 6 feet of the space.
One Level II space may be replaced by three Level I spaces wired for 20-amp, 120-volt EVSE.
225 CMR 23 C405.13 and Table C405.13

HPWH Ready

N/A

Electric Readiness

N/A

Vestibules

N/A

Efficiency Credits

N/A

Paperwork & Modeling

HERS index certificate at permit and at certificate of occupancy.
ENERGY STAR Multifamily New Construction workbook, design-review checklist, field checklist, and common-space HVAC supplement.
EV-ready space locations, wiring diagram, and load calculations.
225 CMR 23 C407.4.2 and C405.13.2

Testing & Verification

Hallways, stairwells, and enclosed common spaces not greater than 1,500 sqft verified by inspection of the continuous air barrier.
Common-space outdoor airflow measured.
HVAC functional testing of common-space and central systems.
Lighting controls tested.
225 CMR 23 C402.5.2.2 and C408
ENERGY STAR MFNC HVAC Functional Testing Checklist

Climate zone

5A

Indoor air

70 F, 35% RH

Dewpoint of that indoor air

41 F

Outdoor air

9 F

Code

2021 IBC Section 1404.3, Table 1404.3(2)

1

Drywall

1.13

1.13

67.2 F

41 F

OK

2

Class II vapor retarder

0.00

1.13

67.2 F

41 F

OK

3

R-23 cavity insulation with 2x6 wood studs

23.00

24.13

10.9 F

41 F

First below dewpoint

4

Wood sheathing

0.62

24.75

9.4 F

41 F

Below dewpoint

5

Air barrier

0.00

24.75

9.4 F

41 F

Below dewpoint

6

Siding / cladding

0.17

24.92

9.0 F

41 F

Below dewpoint

1

Drywall

1.13

1.13

65.9 F

41 F

OK

2

Air barrier

0.00

1.13

65.9 F

41 F

OK

3

R-15 continuous insulation

15.00

16.13

11.4 F

41 F

First below dewpoint

4

Concrete foundation wall

0.50

16.63

9.6 F

41 F

Below dewpoint

5

Soil

0.17

16.80

9.0 F

41 F

Below dewpoint

1

Gypsum ceiling

1.13

1.13

68.6 F

41 F

OK

2

Air barrier

0.00

1.13

68.6 F

41 F

OK

3

R-19 at the underside of the deck

19.00

20.13

45.9 F

41 F

OK

4

Roof deck

0.62

20.75

45.1 F

41 F

OK

5

R-30 continuous insulation

30.00

50.75

9.2 F

41 F

First below dewpoint

6

Roofing

0.17

50.92

9.0 F

41 F

Below dewpoint

HPWH-INTEGRATED

$61.32

$2.28

$60.29

1.02

HPWH-SPLIT

$62.21

$2.82

$60.38

1.02

ELEC RESISTANCE

$62.82

$2.28

$61.18

1.01

Exterior Walls

ELEC RESISTANCE

≥ R-21 cavity insulation (2x6 @ 16" o.c.) with ≥ R-10 continuous exterior insulation.

$7.23

$0.00

$7.23

0.95

HPWH-INTEGRATED

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

$5.56

$0.00

$5.56

0.95

HPWH-SPLIT

≥ R-23 cavity insulation (2x6 @ 16" o.c.), no continuous insulation.

$5.56

$0.00

$5.56

0.95

Below Grade Walls

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Corridor Walls

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Slab

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Floor Over Unconditioned Space

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Floor Over Garage

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Floor Over Podium

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Rim Joists

ELEC RESISTANCE

≥ R-21 rim/band insulation at floor transitions.

$0.20

$0.00

$0.20

0.95

HPWH-INTEGRATED

≥ R-21 rim/band insulation at floor transitions.

$0.20

$0.00

$0.20

0.95

HPWH-SPLIT

≥ R-21 rim/band insulation at floor transitions.

$0.20

$0.00

$0.20

0.95

Roof

ELEC RESISTANCE

Sealed attic: ≥ R-30 insulation + ≥ R-30 continuous insulation.

$3.20

$0.00

$3.20

1.10

HPWH-INTEGRATED

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

$2.79

$0.00

$2.79

1.10

HPWH-SPLIT

Sealed attic: ≥ R-19 insulation + ≥ R-30 continuous insulation.

$2.79

$0.00

$2.79

1.10

Windows & Glass Doors

ELEC RESISTANCE

High performance, U ≤ 0.15 / SHGC ≤ 0.20.

$10.67

$0.00

$10.67

1.00

HPWH-INTEGRATED

High performance, U ≤ 0.25 / SHGC ≤ 0.25.

$9.49

$0.00

$9.49

1.00

HPWH-SPLIT

High performance, U ≤ 0.25 / SHGC ≤ 0.25.

$9.49

$0.00

$9.49

1.00

Doors

ELEC RESISTANCE

Opaque door, U ≤ 0.20 (R-5.0).

$0.35

$0.00

$0.35

0.95

HPWH-INTEGRATED

Opaque door, U ≤ 0.20 (R-5.0).

$0.35

$0.00

$0.35

0.95

HPWH-SPLIT

Opaque door, U ≤ 0.20 (R-5.0).

$0.35

$0.00

$0.35

0.95

Air Sealing

ELEC RESISTANCE

≤ 0.27 CFM50 per sqft of shell; tested.

$1.29

$0.00

$1.29

0.95

HPWH-INTEGRATED

≤ 0.27 CFM50 per sqft of shell; tested.

$1.29

$0.00

$1.29

0.95

HPWH-SPLIT

≤ 0.27 CFM50 per sqft of shell; tested.

$1.29

$0.00

$1.29

0.95

HVAC

ELEC RESISTANCE

Ducted air-source heat pump; SEER2 ≥ 17.5; HSPF2 ≥ 10.5. See HVAC Design Loads.

$16.04

$0.00

$16.04

1.15

HPWH-INTEGRATED

Ducted air-source heat pump; SEER2 ≥ 17.5; HSPF2 ≥ 10.5. See HVAC Design Loads.

$16.04

$0.00

$16.04

1.15

HPWH-SPLIT

Ducted air-source heat pump; SEER2 ≥ 17.5; HSPF2 ≥ 10.5. See HVAC Design Loads.

$16.04

$0.00

$16.04

1.15

Ductwork

ELEC RESISTANCE

Supply and return ducts in conditioned space insulated to code minimum.

$5.18

$0.00

$5.18

1.00

HPWH-INTEGRATED

Supply and return ducts in conditioned space insulated to code minimum.

$5.18

$0.00

$5.18

1.00

HPWH-SPLIT

Supply and return ducts in conditioned space insulated to code minimum.

$5.18

$0.00

$5.18

1.00

Duct Sealing

ELEC RESISTANCE

≤ greater of 80 CFM25 or 8 CFM25 per 100 sqft of conditioned floor area; tested at final.

$0.89

$0.00

$0.89

1.00

HPWH-INTEGRATED

≤ greater of 80 CFM25 or 8 CFM25 per 100 sqft of conditioned floor area; tested at final.

$0.89

$0.00

$0.89

1.00

HPWH-SPLIT

≤ greater of 80 CFM25 or 8 CFM25 per 100 sqft of conditioned floor area; tested at final.

$0.89

$0.00

$0.89

1.00

HVAC Grading

ELEC RESISTANCE

Fan Flow Test: Grade II
Watt Draw Test: Grade II
Refrigerant Charge: Grade I (weigh-in method)
HVAC installer must provide photo of the digital refrigerant scale showing the amount charged, with the tank on the scale and hoses connected to the outdoor unit, along with a photo of the outdoor unit's data plate.
If the non-invasive procedure in ANSI / RESNET / ACCA 310 is not permitted to be used during the final inspection of a unit (i.e., due to the equipment type or to outdoor air temperatures that do not meet the requirements of the non-invasive method), then the unit is permitted to be certified with a default refrigerant charge designation of Grade III. Note that in these circumstances, the weigh-in method procedure in ANSI / RESNET / ACCA 310 may still be used to pursue a Grade I designation.

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

Fan Flow Test: Grade II
Watt Draw Test: Grade II
Refrigerant Charge: Grade I (weigh-in method)
HVAC installer must provide photo of the digital refrigerant scale showing the amount charged, with the tank on the scale and hoses connected to the outdoor unit, along with a photo of the outdoor unit's data plate.
If the non-invasive procedure in ANSI / RESNET / ACCA 310 is not permitted to be used during the final inspection of a unit (i.e., due to the equipment type or to outdoor air temperatures that do not meet the requirements of the non-invasive method), then the unit is permitted to be certified with a default refrigerant charge designation of Grade III. Note that in these circumstances, the weigh-in method procedure in ANSI / RESNET / ACCA 310 may still be used to pursue a Grade I designation.

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

Fan Flow Test: Grade II
Watt Draw Test: Grade II
Refrigerant Charge: Grade I (weigh-in method)
HVAC installer must provide photo of the digital refrigerant scale showing the amount charged, with the tank on the scale and hoses connected to the outdoor unit, along with a photo of the outdoor unit's data plate.
If the non-invasive procedure in ANSI / RESNET / ACCA 310 is not permitted to be used during the final inspection of a unit (i.e., due to the equipment type or to outdoor air temperatures that do not meet the requirements of the non-invasive method), then the unit is permitted to be certified with a default refrigerant charge designation of Grade III. Note that in these circumstances, the weigh-in method procedure in ANSI / RESNET / ACCA 310 may still be used to pursue a Grade I designation.

$0.00

$0.00

$0.00

1.00

Mechanical Ventilation

ELEC RESISTANCE

In-unit ERV
1-bedroom: 70 CFM, ≥ 86% ASRE
2-bedroom: 90 CFM, ≥ 83% ASRE
3-bedroom: 90 CFM, ≥ 83% ASRE

$2.37

$0.00

$2.37

1.20

HPWH-INTEGRATED

In-unit ERV
1-bedroom: 70 CFM, ≥ 86% ASRE
2-bedroom: 90 CFM, ≥ 83% ASRE
3-bedroom: 90 CFM, ≥ 83% ASRE

$2.37

$0.00

$2.37

1.20

HPWH-SPLIT

In-unit ERV
1-bedroom: 70 CFM, ≥ 86% ASRE
2-bedroom: 90 CFM, ≥ 83% ASRE
3-bedroom: 90 CFM, ≥ 83% ASRE

$2.45

$0.00

$2.45

1.20

Local Mechanical Exhaust

ELEC RESISTANCE

Bathroom(s): at least 50 CFM intermittent and up to 3.0 sones, or at least 20 CFM continuous and up to 2.0 sones.
Kitchen(s): at least 100 CFM intermittent and up to 3.0 sones, or continuous at 5 ACH.
Both: exhaust directly outdoors with ENERGY STAR certified fans. A balanced ERV or HRV serving the space may satisfy this requirement. The dwelling-unit balanced ERV is designed to satisfy this requirement.

$1.26

$0.00

$1.26

1.05

HPWH-INTEGRATED

Bathroom(s): at least 50 CFM intermittent and up to 3.0 sones, or at least 20 CFM continuous and up to 2.0 sones.
Kitchen(s): at least 100 CFM intermittent and up to 3.0 sones, or continuous at 5 ACH.
Both: exhaust directly outdoors with ENERGY STAR certified fans. A balanced ERV or HRV serving the space may satisfy this requirement. The dwelling-unit balanced ERV is designed to satisfy this requirement.

$1.26

$0.00

$1.26

1.05

HPWH-SPLIT

Bathroom(s): at least 50 CFM intermittent and up to 3.0 sones, or at least 20 CFM continuous and up to 2.0 sones.
Kitchen(s): at least 100 CFM intermittent and up to 3.0 sones, or continuous at 5 ACH.
Both: exhaust directly outdoors with ENERGY STAR certified fans. A balanced ERV or HRV serving the space may satisfy this requirement. The dwelling-unit balanced ERV is designed to satisfy this requirement.

$1.26

$0.00

$1.26

1.05

Thermostats

ELEC RESISTANCE

Wi-Fi connected thermostat.

$0.15

$0.11

$0.04

1.05

HPWH-INTEGRATED

Wi-Fi connected thermostat.

$0.15

$0.11

$0.04

1.05

HPWH-SPLIT

Wi-Fi connected thermostat.

$0.15

$0.11

$0.04

1.05

DHW

ELEC RESISTANCE

Electric resistance storage water heater; UEF ≥ 0.93; 50 gal.

$1.11

$0.00

$1.11

0.90

HPWH-INTEGRATED

1-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 40 gal
2-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 50 gal
3-Bedroom: In-unit heat pump water heater (HPWH); UEF ≥ 3.88; 65 gal

$3.35

$0.27

$3.08

1.20

HPWH-SPLIT

1-Bedroom: Split-system heat pump water heater (HPWH); UEF ≥ 3.88; 40 gal
2-Bedroom: Split-system heat pump water heater (HPWH); UEF ≥ 3.88; 50 gal
3-Bedroom: Split-system heat pump water heater (HPWH); UEF ≥ 3.88; 65 gal

$4.16

$0.81

$3.35

1.05

DHW Piping

ELEC RESISTANCE

Supply piping insulated to ≥ R-3.

$0.89

$0.00

$0.89

0.95

HPWH-INTEGRATED

Supply piping insulated to ≥ R-3.

$0.89

$0.00

$0.89

0.95

HPWH-SPLIT

Supply piping insulated to ≥ R-3.

$0.89

$0.00

$0.89

0.95

Water Fixtures

ELEC RESISTANCE

WaterSense certified (Lavatory ≤ 1.2 GPM; Shower ≤ 2.0 GPM; Kitchen ≤ 2.2 GPM).

$2.22

$0.00

$2.22

1.00

HPWH-INTEGRATED

WaterSense certified (Lavatory ≤ 1.2 GPM; Shower ≤ 2.0 GPM; Kitchen ≤ 2.2 GPM).

$2.22

$0.00

$2.22

1.00

HPWH-SPLIT

WaterSense certified (Lavatory ≤ 1.2 GPM; Shower ≤ 2.0 GPM; Kitchen ≤ 2.2 GPM).

$2.22

$0.00

$2.22

1.00

Refrigerator

ELEC RESISTANCE

≤ 600 kWh/yr; electric.

$0.94

$0.00

$0.94

1.10

HPWH-INTEGRATED

≤ 600 kWh/yr; electric.

$0.94

$0.00

$0.94

1.10

HPWH-SPLIT

≤ 600 kWh/yr; electric.

$0.94

$0.00

$0.94

1.10

Dishwasher

ELEC RESISTANCE

≤ 269 kWh/yr; electric.

$0.52

$0.00

$0.52

1.10

HPWH-INTEGRATED

≤ 269 kWh/yr; electric.

$0.52

$0.00

$0.52

1.10

HPWH-SPLIT

≤ 269 kWh/yr; electric.

$0.52

$0.00

$0.52

1.10

Clothes Washer

ELEC RESISTANCE

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 105 kWh/yr; electric.

$0.66

$0.00

$0.66

1.10

HPWH-INTEGRATED

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 152 kWh/yr; electric.

$0.63

$0.00

$0.63

1.10

HPWH-SPLIT

IMEF ≥ 2.06; IWF ≤ 4.2; ≤ 152 kWh/yr; electric.

$0.63

$0.00

$0.63

1.10

Clothes Dryer

ELEC RESISTANCE

Heat pump dryer; ventless; CEF ≥ 8.5.

$1.42

$0.00

$1.42

1.00

HPWH-INTEGRATED

Heat pump dryer; ventless; CEF ≥ 6.

$1.22

$0.00

$1.22

1.00

HPWH-SPLIT

Heat pump dryer; ventless; CEF ≥ 6.

$1.22

$0.00

$1.22

1.00

Stove / Oven

ELEC RESISTANCE

Electric induction cooktop; convection oven.

$0.96

$0.27

$0.69

1.00

HPWH-INTEGRATED

Electric range.

$0.71

$0.00

$0.71

1.05

HPWH-SPLIT

Electric range.

$0.71

$0.00

$0.71

1.05

Lighting

ELEC RESISTANCE

≥ 100% high-efficacy (LED).

$4.00

$0.00

$4.00

0.85

HPWH-INTEGRATED

≥ 100% high-efficacy (LED).

$4.00

$0.00

$4.00

0.85

HPWH-SPLIT

≥ 100% high-efficacy (LED).

$4.00

$0.00

$4.00

0.85

Solar Ready

ELEC RESISTANCE

Exempt. A solar PV system is planned for installation on the building, exempting the project from solar-ready zone requirements.

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

Exempt. A solar PV system is planned for installation on the building, exempting the project from solar-ready zone requirements.

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

Exempt. A solar PV system is planned for installation on the building, exempting the project from solar-ready zone requirements.

$0.00

$0.00

$0.00

1.00

EV Ready

ELEC RESISTANCE

At least 20% of parking spaces wired EV-ready (40-amp Level II; shared circuits with load management allowed).

$0.46

$0.00

$0.46

1.00

HPWH-INTEGRATED

At least 20% of parking spaces wired EV-ready (40-amp Level II; shared circuits with load management allowed).

$0.46

$0.00

$0.46

1.00

HPWH-SPLIT

At least 20% of parking spaces wired EV-ready (40-amp Level II; shared circuits with load management allowed).

$0.46

$0.00

$0.46

1.00

HPWH Ready

ELEC RESISTANCE

N/A

$0.00

$0.00

$0.00

1.00

HPWH-INTEGRATED

N/A

$0.00

$0.00

$0.00

1.00

HPWH-SPLIT

N/A

$0.00

$0.00

$0.00

1.00

Paperwork & Modeling

ELEC RESISTANCE

ENERGY STAR energy model to the target (per-unit HERS or whole-building ASHRAE path), the ENERGY STAR design-review checklist and multifamily workbook, and an HVAC design report.

$0.24

$1.90

-$1.66

1.00

HPWH-INTEGRATED

ENERGY STAR energy model to the target (per-unit HERS or whole-building ASHRAE path), the ENERGY STAR design-review checklist and multifamily workbook, and an HVAC design report.

$0.24

$1.90

-$1.66

1.00

HPWH-SPLIT

ENERGY STAR energy model to the target (per-unit HERS or whole-building ASHRAE path), the ENERGY STAR design-review checklist and multifamily workbook, and an HVAC design report.

$0.24

$1.90

-$1.66

1.00

Testing & Verification

ELEC RESISTANCE

ENERGY STAR field verification: pre-drywall and final inspections, unit air-tightness (blower door), duct-leakage, ventilation and exhaust airflow, and HVAC functional testing.

$0.57

$0.00

$0.57

1.00

HPWH-INTEGRATED

ENERGY STAR field verification: pre-drywall and final inspections, unit air-tightness (blower door), duct-leakage, ventilation and exhaust airflow, and HVAC functional testing.

$0.57

$0.00

$0.57

1.00

HPWH-SPLIT

ENERGY STAR field verification: pre-drywall and final inspections, unit air-tightness (blower door), duct-leakage, ventilation and exhaust airflow, and HVAC functional testing.

$0.57

$0.00

$0.57

1.00