23 Ford Crossing Prelim HERS
ENERGY EFFICIENCY PLAN
Lot 4 Meadow Run, Village Hill, Northampton MA
Conditioned Floor Area and Volume 3294 ft2, 27,999 ft3 (including basement)
Building Type Single family detached
Bedrooms 4 (including basement)
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-21 Superior Wall Xi+
with R-15 fiberglass batts in cavities (Grade I)
Basement Slab 4” XPS (R-20) underneath
2” XPS (R-10) at edge
Rim & Band Joists 3” closed cell spray foam (R-18)
Exterior Walls
Double stud wall – two 2x4 stud walls with 3” space between
Filled with densepack cellulose (R-35)
Walls capped at top plate and insulation enclosed by interior air barrier
(drywall and/or vapor retarder)
Walls to Garage Same as exterior walls
Windows Triple glazed, Argon gas filled, U-value = 0.23, SHGC = 0.21
48” x 48” window in foundation Double glazed, U-value = 0.30, SHGC = 0.29
Glass Doors Triple glazed, Argon gas filled, U-value = 0.23, SHGC = 0.21
Exterior Doors R-5 / U-0.20
Flat Ceilings 16” loose-blown cellulose (R-60), sealed eave baffles
Attic Hatches 8” XPS foam board (R-40), fully gasketed,
framed edge dam to height of surrounding insulation
Air Sealing & Blower Door Test Aerobarrier run until 0.6 ACH50 or better achieved
Thermal Enclosure Checklist Meet all Checklist Requirements as verified by a HERS rater at pre-
drywall and final inspection
Plumbing & Mechanical Systems Specifications Used in Analysis
Heating & Cooling Equipment:
Living/Kitchen/Dining
Single head ductless mini-split system
13.3 HSPF, 25 SEER
Heating & Cooling Equipment: Bedrooms Multi head ductless mini-split system
10.4 HSPF, 16 SEER
Thermostats Programmable
Water Heating Equipment 2.33 EF heat pump water heater, 80 gallons
Domestic Hot Water Pipes ½ inch diameter - maximum 35 feet
from water heater to farthest fixture
Whole House Ventilation
Energy Recovery Ventilator, 40 watts
70% Sensible Recovery Efficiency, 50% Total Recovery Efficiency
76-95 CFM continuous airflow
ENERGY EFFICIENCY PLAN
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Lighting & Appliances Specifications Used in Analysis
Lighting 100% LED, including interior, exterior, and garage
Refrigerator 550 kWh/year or less
Dishwasher ENERGY STAR certified
Clothes Washer ENERGY STAR certified
Clothes 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: 38
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.
Preliminary Rater: Mark Newey
Date: 4/24/2020
Job #: 19-03197-4