30A-044 P16046 23 Lexington Ave Florence Energy Efficiency Plan
ENERGY EFFICIENCY PLAN
Project Address: 23 Lexington Ave, Florence, MA
Conditioned Floor Area 2,757 ft2 (including heated basement)
Volume 24,230 ft3
Building Type Single family detached
Bedrooms 3
Assumptions for Preliminary Home Energy Rating
CET has completed a Preliminary Home Energy Rating based on the construction plans you have provided. Any
energy features not listed below are assumed to meet the prescriptive requirements of the IECC 2015.
Building Envelope Specifications Used in Analysis
Foundation Walls R-15 interior foam board, sealed
Basement Slab uninsulated
Floors over Garage R-30 fiberglass batts, held in contact with subfloor
Rim & Band Joists R-21 fiberglass batts
Exterior Walls, including to Garage R-21 fiberglass batts, all cavities fully enclosed by air barrier on top &
both sides
Windows U-value = 0.29, SHGC = 0.28
Glass Doors U-value = 0.29, SHGC = 0.27
Exterior Doors R-5 / U-0.20
Flat Ceilings 14” loose-blown cellulose (R-52), sealed eave wind baffles
Full insulation contact with sheetrock ceiling
Attic Hatches 4” XPS foam board (R-20), fully gasketed,
framed edge dam to height of surrounding insulation
Blower Door Test 3.0 ACH50 or better
Thermal Enclosure Checklist, sections 2&4 Meet all Checklist Requirements as verified by a HERS rater at pre-
drywall and final inspection
Plumbing & Mechanical Systems Specifications Used in Analysis
Heating Equipment 95% AFUE natural gas or propane furnace
Cooling Equipment N/A
Water Heating Equipment 0.97 EF on-demand natural gas or propane water heater
Domestic Hot Water Pipes 20 feet horizontal distance from water heater to farthest fixture
Bath vanity faucets & showerheads ≤ 2.0 gallons per minute
Duct Leakage 10 CFM25 leakage to outdoors; all ductwork thoroughly sealed,
particularly boots and chases sealed to 2nd floor ceiling.
Duct Location & Insulation 45% Unconditioned Attic R-8, 55% Conditioned Spaces R-0
Whole House Ventilation Continuously operating, variable speed bath exhaust fan <1.0 sones,
Energy Star Certified
ENERGY EFFICIENCY PLAN
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Lighting & Appliances Specifications Used in Analysis
Lighting 100% LED, CFL, or pin-based fluorescent
Refrigerator ENERGY STAR certified
Dishwasher ENERGY STAR certified
Clothes Washer & Dryer ENERGY STAR certified
Preliminary Home Energy Rating Results
Based on the assumptions described above, we have calculated the following Preliminary Home Energy Rating results.
Preliminary HERS Index: 54
Estimated Mass Save Rebate: $1,600*
Note that Confirmed Home Energy Rating results may vary from the Preliminary Home Energy Rating results due to
changes in building plans, energy features installed in the home, RESNET standards, software changes, and other
factors.
* = Mass Save Residential New Construction requirements and incentive amounts can change at any time without
notice at the discretion of program sponsors. We anticipate, but do not guarantee, that current program requirements
and incentive amounts will apply to this project as long as it is completed and inspected by November 30, 2018.
Preliminary Rater: John Saveson
Date: March 6, 2018
Job #: P16046