05 -010 P15915 83 Grove Ave Leeds - Energy Efficiency Plan 2017-07-18
ENERGY EFFICIENCY PLAN – revised 7/18/17
Project Address: 83 Grove Ave, Leeds MA
Conditioned Floor Area 2,046 and 896 ft2
Volume 16,598 and 10,734 ft3
Building Type Two family attached
Bedrooms 2 per dwelling unit
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 2x4 stud wall 16” on center Spaced 4.5” from concrete
Packed with cellulose 8” total (R-28)
Basement Slab 4” XPS foam board (R-20) under slab
2” XPS foam board (R-10) at slab edge
Rim & Band Joists 12” cellulose (R-42)
Exterior Walls 2x4 double stud wall 16” on center with 5” gap Packed with cellulose 12” total (R-42)
all cavities fully enclosed by air barrier on top & both sides
Windows U-value = 0.30, SHGC = 0.29
Glass Doors U-value = 0.30, SHGC = 0.29
Exterior Doors R-5 / U-0.20
Flat Ceiling – first floor 11.3” densepacked cellulose (R-40) between 2x12 joists + 3” polyisocyanurate foam board (R-18) on top of roof sheathing
Cathedral Ceilings – second floor
2x12 roof rafters with gusseted 2x4 rafters below, 2.5” gap
17.3” dense-packed cellulose (R-60) Full insulation contact with ceiling
Blower Door Test 1.2 ACH50 or better
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 9.3 HPSF, 19.5 SEER ductless mini-split heat pumps
Water Heating Equipment
0.82 EF electric storage tank water heater
With 128 sqft solar water heating panels, south-facing (64 sqft per dwelling unit)
Domestic Hot Water Pipes
Horizontal distance from water heater to farthest fixture:
40 ft in main house, 30 ft in apartment All hot water pipes insulated to R-3
Whole House Ventilation
Heat Recovery Ventilator – continuously operating
(52 CFM for main house, 38 CFM for apartment), 75% Sensible Recovery Efficiency, 50 watts
ENERGY EFFICIENCY PLAN
Page 2 of 2 ~ The Center for EcoTechnology ~ Tel (413) 586-7350 ext.242 ~ Fax (413) 586-7351 ~ greenhome@cetonline.org
Lighting & Appliances Specifications Used in Analysis
Lighting 95% LED, CFL, or pin-based fluorescent
Refrigerator ENERGY STAR certified
Dishwasher ENERGY STAR certified
Clothes Washer 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: 42 for main house, 43 for apartment
Estimated Mass Save Rebate: $3400 for main house, $2100 for apartment*
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 June 30, 2018.
Preliminary Rater: Mark Newey
Date: 7/18/17
Job #: P15915