CS87 Energy Code Feasibility Study in Brockton, Massachusetts

Exterior Walls

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

≥ R-23 cavity insulation (2x6 @ 16" o.c.) with ≥ R-6 continuous exterior insulation.

≥ R-23 cavity insulation (2x6 @ 16" o.c.) with ≥ R-6 continuous exterior insulation.

Air Sealing

≤ 0.27 CFM50 per sqft of enclosure (compartmentalization); tested.

≤ 0.23 CFM50 per sqft of enclosure (compartmentalization); tested.

≤ 0.23 CFM50 per sqft of enclosure (compartmentalization); tested.

HVAC

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

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

Natural gas furnace (as modeled); AFUE ≥ 95; cooling by a separate system, cooling only; SEER2 ≥ 16. See HVAC Design Loads.

DHW

1-Bedroom: Heat pump water heater (HPWH) (as modeled); UEF ≥ 3.88; 40 gal
2-Bedroom: Heat pump water heater (HPWH) (as modeled); UEF ≥ 3.88; 50 gal
3-Bedroom: Heat pump water heater (HPWH) (as modeled); UEF ≥ 3.88; 65 gal

Centralized gas hot water heating system with two storage tanks and a temperature-controlled recirculating system; ≥ 0.9 energy factor; 200 gal.

Centralized gas hot water heating system with two storage tanks and a temperature-controlled recirculating system; ≥ 0.9 energy factor; 200 gal.

Dishwasher

≤ 269 kWh/yr; electric.

≤ 240 kWh/yr; electric.

≤ 269 kWh/yr; electric.

Clothes Dryer

Standard electric dryer; vented; CEF ≥ 3.93.

Heat pump dryer; ventless; CEF ≥ 8.

Heat pump dryer; ventless; CEF ≥ 8.

Cost $/sf

$60.77

$61.00

$57.44

Incentive $/sf

$1.90

$1.90

$0.00

Net $/sf

$60.03

$59.82

$58.05

1-Bedroom

1.0

0.9

0.0

2.0

2.8

1.8

8.6 @ 9°F

9.1 @ 5°F

2-Bedroom

2.6

0.7

0.0

3.2

4.2

2.4

13.2 @ 9°F

14.0 @ 5°F

3-Bedroom

3.8

0.9

0.0

3.9

4.8

2.4

15.8 @ 9°F

16.8 @ 5°F

1-Bedroom

2.4

0.9

2.1

1.6

2.7

9.6

0.72

2-Bedroom

3.4

1.5

2.3

2.1

3.7

13.0

0.71

3-Bedroom

3.0

1.9

2.5

2.3

4.1

13.8

0.70

1-Bedroom

8.6 to 20.0 kBtuh rated

≥ 9.1 kBtuh @ 5°F

2-Bedroom

11.7 to 20.0 kBtuh rated

≥ 14.0 kBtuh @ 5°F

3-Bedroom

12.4 to 20.0 kBtuh rated

≥ 16.8 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

v1.2

Note

Code minimum for this permit is v1.1; v1.2 used for v1.2. Confirm certification path matches the incentive or AHJ requirement. Reference wall U is 2021 IECC Table C402.1.4 Group R, wood framed and other (U-0.051 in this zone). v1.2 Table 2, ERI commercial option, uses that column for a 4-story-or-taller building. Footnote 12.i (U-0.064 in Climate Zone 5) applies only when the reference is the 2009 IECC commercial chapter, so it is not used on v1.2. 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 0.039 is the area-weighted Ekotrope assembly U (0.039). The v1.1 wood-framed-wall exception is the Reference U in this table (0.051), not a replacement for a better Ekotrope U.

Walls

≥ R-23 cavity insulation (2x6 @ 16" o.c.) with ≥ R-6 continuous exterior insulation.

Roof

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

Windows

High performance, U ≤ 0.25 / SHGC 0.25-0.30.

Doors

Opaque door, U ≤ 0.20 (R-5.0).

Slab

N/A

69

27,437

7,761

6,200

Opaque exterior walls

27,437 sf

0.039

1,079

0.051

1,399

Roof / ceiling

7,761 sf

0.019

150

0.024

186

Windows & glass doors

6,200 sf

0.250

1,550

0.270

1,674

69

2,779

3,260

85.3%

PASS

Site total

2,779

3,260

85.3%

PASS

Exterior Walls

≥ R-23 cavity insulation (2x6 @ 16" o.c.) with ≥ R-6 continuous exterior insulation. (Product Rec).

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 0.25-0.30. (Product Rec).

Doors

Opaque door, U ≤ 0.20 (R-5.0).

Air Sealing

≤ 0.23 CFM50 per sqft of enclosure (compartmentalization); tested. (Air Sealing Protocol)

HVAC

Natural gas furnace (as modeled); AFUE ≥ 95; cooling by a separate system, cooling only; SEER2 ≥ 16. 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.

Thermostats

Programmable thermostat (as modeled).

DHW

Centralized gas hot water heating system with two storage tanks and a temperature-controlled recirculating system; ≥ 0.9 energy factor; 200 gal. (Product Rec).

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.

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 ≥ 8. (Product Rec).

Stove / Oven

Electric range. (Product Rec).

Lighting

≥ 100% high-efficacy (LED).

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

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.) with ≥ R-6 continuous exterior 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

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

Gas furnace serving these spaces.
Under 225,000 Btu/h: AFUE ≥ 90.
225,000 Btu/h or larger: 81% Et.
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, Exhibit 1, Tables 1 and 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

Centralized gas hot water heating system with two storage tanks and a temperature-controlled recirculating system; ≥ 0.9 energy factor; 200 gal.

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

67.8 F

41 F

OK

2

Class II vapor retarder

0.00

1.13

67.8 F

41 F

OK

3

R-23 cavity insulation with 2x6 wood studs

23.00

24.13

22.4 F

41 F

First below dewpoint

4

Wood sheathing

0.62

24.75

21.2 F

41 F

Below dewpoint

5

Air barrier

0.00

24.75

21.2 F

41 F

Below dewpoint

6

R-6 continuous insulation

6.00

30.75

9.3 F

41 F

Below dewpoint

7

Siding / cladding

0.17

30.92

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

GAS-HEAT

$57.44

$0.00

$58.05

1.01

CURRENT

$61.00

$1.90

$59.82

1.01

ELECTRIC

$60.77

$1.90

$60.03

1.02

Exterior Walls

CURRENT

≥ R-23 cavity insulation (2x6 @ 16" o.c.) with ≥ R-6 continuous exterior insulation.

$7.02

$0.00

$7.02

0.90

ELECTRIC

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

$5.56

$0.00

$5.56

0.95

GAS-HEAT

≥ R-23 cavity insulation (2x6 @ 16" o.c.) with ≥ R-6 continuous exterior insulation.

$7.02

$0.00

$7.02

0.90

Below Grade Walls

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Corridor Walls

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Slab

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Floor Over Unconditioned Space

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Floor Over Garage

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Floor Over Podium

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Rim Joists

CURRENT

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

$0.20

$0.00

$0.20

0.95

ELECTRIC

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

$0.20

$0.00

$0.20

0.95

GAS-HEAT

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

$0.20

$0.00

$0.20

0.95

Roof

CURRENT

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

$2.79

$0.00

$2.79

1.10

ELECTRIC

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

$2.79

$0.00

$2.79

1.10

GAS-HEAT

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

$2.79

$0.00

$2.79

1.10

Windows & Glass Doors

CURRENT

High performance, U ≤ 0.25 / SHGC 0.25-0.30.

$9.49

$0.00

$9.49

1.00

ELECTRIC

High performance, U ≤ 0.25 / SHGC 0.25-0.30.

$9.49

$0.00

$9.49

1.00

GAS-HEAT

High performance, U ≤ 0.25 / SHGC 0.25-0.30.

$9.49

$0.00

$9.49

1.00

Doors

CURRENT

Opaque door, U ≤ 0.20 (R-5.0).

$0.35

$0.00

$0.35

0.95

ELECTRIC

Opaque door, U ≤ 0.20 (R-5.0).

$0.35

$0.00

$0.35

0.95

GAS-HEAT

Opaque door, U ≤ 0.20 (R-5.0).

$0.35

$0.00

$0.35

0.95

Air Sealing

CURRENT

≤ 0.23 CFM50 per sqft of enclosure (compartmentalization); tested.

$1.40

$0.00

$1.40

0.95

ELECTRIC

≤ 0.27 CFM50 per sqft of enclosure (compartmentalization); tested.

$1.29

$0.00

$1.29

0.95

GAS-HEAT

≤ 0.23 CFM50 per sqft of enclosure (compartmentalization); tested.

$1.40

$0.00

$1.40

0.95

HVAC

CURRENT

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

$16.04

$0.00

$16.04

1.15

ELECTRIC

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

$16.04

$0.00

$16.04

1.15

GAS-HEAT

Natural gas furnace (as modeled); AFUE ≥ 95; cooling by a separate system, cooling only; SEER2 ≥ 16. See HVAC Design Loads.

$12.53

$0.00

$12.53

1.10

Ductwork

CURRENT

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

$5.18

$0.00

$5.18

1.00

ELECTRIC

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

$5.18

$0.00

$5.18

1.00

GAS-HEAT

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

$5.18

$0.00

$5.18

1.00

Duct Sealing

CURRENT

≤ 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

ELECTRIC

≤ 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

GAS-HEAT

≤ 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

CURRENT

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

ELECTRIC

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

GAS-HEAT

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

CURRENT

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

ELECTRIC

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

GAS-HEAT

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

Local Mechanical Exhaust

CURRENT

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.

$1.26

$0.00

$1.26

1.05

ELECTRIC

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.

$1.26

$0.00

$1.26

1.05

GAS-HEAT

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.

$1.26

$0.00

$1.26

1.05

Thermostats

CURRENT

Programmable thermostat (as modeled).

$0.15

$0.00

$0.15

1.05

ELECTRIC

Programmable thermostat (as modeled).

$0.15

$0.00

$0.15

1.05

GAS-HEAT

Programmable thermostat (as modeled).

$0.15

$0.00

$0.15

1.05

DHW

CURRENT

Centralized gas hot water heating system with two storage tanks and a temperature-controlled recirculating system; ≥ 0.9 energy factor; 200 gal.

$1.21

$0.00

$1.21

1.00

ELECTRIC

1-Bedroom: Heat pump water heater (HPWH) (as modeled); UEF ≥ 3.88; 40 gal
2-Bedroom: Heat pump water heater (HPWH) (as modeled); UEF ≥ 3.88; 50 gal
3-Bedroom: Heat pump water heater (HPWH) (as modeled); UEF ≥ 3.88; 65 gal

$3.35

$0.00

$3.35

1.20

GAS-HEAT

Centralized gas hot water heating system with two storage tanks and a temperature-controlled recirculating system; ≥ 0.9 energy factor; 200 gal.

$1.21

$0.00

$1.21

1.00

DHW Piping

CURRENT

Supply piping insulated to ≥ R-3.

$0.89

$0.00

$0.89

0.95

ELECTRIC

Supply piping insulated to ≥ R-3.

$0.89

$0.00

$0.89

0.95

GAS-HEAT

Supply piping insulated to ≥ R-3.

$0.89

$0.00

$0.89

0.95

Water Fixtures

CURRENT

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

$2.22

$0.00

$2.22

1.00

ELECTRIC

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

$2.22

$0.00

$2.22

1.00

GAS-HEAT

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

$2.22

$0.00

$2.22

1.00

Refrigerator

CURRENT

≤ 600 kWh/yr; electric.

$0.94

$0.00

$0.94

1.10

ELECTRIC

≤ 600 kWh/yr; electric.

$0.94

$0.00

$0.94

1.10

GAS-HEAT

≤ 600 kWh/yr; electric.

$0.94

$0.00

$0.94

1.10

Dishwasher

CURRENT

≤ 240 kWh/yr; electric.

$0.57

$0.00

$0.57

1.10

ELECTRIC

≤ 269 kWh/yr; electric.

$0.52

$0.00

$0.52

1.10

GAS-HEAT

≤ 269 kWh/yr; electric.

$0.52

$0.00

$0.52

1.10

Clothes Washer

CURRENT

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

$0.63

$0.00

$0.63

1.10

ELECTRIC

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

$0.63

$0.00

$0.63

1.10

GAS-HEAT

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

$0.63

$0.00

$0.63

1.10

Clothes Dryer

CURRENT

Heat pump dryer; ventless; CEF ≥ 8.

$1.42

$0.00

$1.42

1.00

ELECTRIC

Standard electric dryer; vented; CEF ≥ 3.93.

$0.67

$0.00

$0.67

1.00

GAS-HEAT

Heat pump dryer; ventless; CEF ≥ 8.

$1.42

$0.00

$1.42

1.00

Stove / Oven

CURRENT

Electric range.

$0.71

$0.00

$0.71

1.00

ELECTRIC

Electric range.

$0.71

$0.00

$0.71

1.00

GAS-HEAT

Electric range.

$0.71

$0.00

$0.71

1.00

Lighting

CURRENT

≥ 100% high-efficacy (LED).

$4.00

$0.00

$4.00

0.85

ELECTRIC

≥ 100% high-efficacy (LED).

$4.00

$0.00

$4.00

0.85

GAS-HEAT

≥ 100% high-efficacy (LED).

$4.00

$0.00

$4.00

0.85

Solar Ready

CURRENT

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

$0.00

$0.00

$0.00

1.00

ELECTRIC

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

$0.00

$0.00

$0.00

1.00

GAS-HEAT

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

$0.00

$0.00

$0.00

1.00

EV Ready

CURRENT

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

$0.46

$0.00

$0.46

1.00

ELECTRIC

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

$0.46

$0.00

$0.46

1.00

GAS-HEAT

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

$0.46

$0.00

$0.46

1.00

HPWH Ready

CURRENT

N/A

$0.00

$0.00

$0.00

1.00

ELECTRIC

N/A

$0.00

$0.00

$0.00

1.00

GAS-HEAT

N/A

$0.00

$0.00

$0.00

1.00

Paperwork & Modeling

CURRENT

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

ELECTRIC

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

GAS-HEAT

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

$0.00

$0.24

1.00

Testing & Verification

CURRENT

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

ELECTRIC

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

GAS-HEAT

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