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HERS 258 Old Wilson Rd Northampton Energy Efficiency Plan ENERGY EFFICIENCY PLAN Project Address: 258 Old Wilson Rd, Northampton, MA Conditioned Floor Area 3,559 ft2 Volume 45,265 ft3 Building Type Single family detached Bedrooms 4 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 2018. Building Envelope Specifications Used in Analysis Foundation Walls Superior Wall Xi with R-21 fiberglass batts in cavities—Grade 1 (fully lofted and fitted around all obstructions with no gaps, all cavities completely filled with insulation and fully enclosed by rigid air barrier on interior); ≥ 12” deep ½” crushed stone base under slab. Lower Level Floor Slab R-20 sub-slab insulation; Photo-document slab insulation prior to pouring concrete. Rim & Band Joists 4” closed cell spray foam (R-24+) including onto top of foundation wall. Exterior Walls 10” Cavity double 2x4 stud wall with dense-packed cellulose (R-35); Sheathing joints, edges and penetrations taped/sealed. Walls to Garage Same as exterior walls; Garage-side sheathing sealed to top of foundation wall/slab and to wall top plate. Windows & Glass Doors U-value = 0.28, SHGC = 0.28 Door to Garage R-5 / U-0.20, fully gasketed with sweep. Vaulted Trussed Ceilings R-60 dense-pack cellulose in open-web roof trusses; sealed eave wind baffles, full insulation contact with sheetrock ceiling. Blower Door Test/Envelope Airtightness 0.6 ACH50 or lower, achieved with Aerobarrier system. Energy Star, IAP, & ZERH Checklists 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 Ducted air-source heat pumps, 9.5 HSPF, 16 SEER, ≥ MERV 8 filters; Electric resistance supplemental heat: 4,000 watt allowance (2 bathroom wall heaters x 2,000 watts each). Thermostats 7-day programmable Water Heating Equipment 3.39 Energy Factor heat pump water heater Domestic Hot Water Pipes <.5 gallons maximum capacity between water heater and any fixture. Showerheads & Bathroom Lavatory Faucets WaterSense labeled Heating/Cooling Duct Leakage .04 CFM25 total leakage per sq ft conditioned floor area when tested at 25 pascals pressure; 0 leakage to outdoors (100% within conditioned envelope). Whole House Ventilation High Efficiency Heat Recovery Ventilator, 76% ASRE and 32 watts at 73 CFM minimum continuous ventilation; return air duct directly from house; Adjustable speed control. Basis: Broan HRV160TE 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 100% LED, CFL, or pin-based fluorescent Refrigerator ENERGY STAR certified Dishwasher ENERGY STAR certified Clothes Washer & Dryer ENERGY STAR certified Ceiling Fans (if present) 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: 46 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. Available 2018 IECC Stretch Code HERS Index Offsets Offset Photovoltaic system 2.5 kw or greater 5 points Renewable energy primary heating system, including Clean Biomass Heating System, solar thermal array, cold climate air source heat pump (COP of 1.75 at 5 degrees F), or ground source heat pump 5 points Solar thermal array for domestic hot water 2 points Preliminary Rater: John Saveson Date: Sept 22, 2021 Job #: 21-24784-2