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23B-018 HERS-778 26 Hatfield St air leakage reportAir Leakage Property 26 Hatfield St Northampton, MA 01060 Weather:Northampton, MA HERS-778 26 Hatfield St registered.blg Organization Power House Energy Consulting 413-215-7141 David Gagne Builder McCutchen Development Whole House Infiltration ASHRAE 62.2 - Ventilation Requirements The ASHRAE 62.2 flow rates shown above are the CONTINUOUS mechanical fresh air ventilation which will meet the 'whole-building' requirement under that version of the standard. Both values incorporate any appropriate 'infiltration credit'. Intermittent mechanical ventilation may be used if the flow rate is adjusted accordingly. For example, the runtime can be reduced to 12 hours per day using a doubled flow rate, as long as the system provides ventilation at least once every 3 hours. For more detail, refer to the appropriate standard. REM/Rate - Residential Energy Analysis and Rating Software v14.6.3.1 This information does not constitute any warranty of energy cost or savings. © 1985-2016 Noresco, Boulder, Colorado. HERS Confirmed 3/29/17 Rating No:HERS-778 Rater ID:7013322 Duct Leakage Ventilation Blower Door Test Heating Cooling Natural ACH 0.29 0.22 ACH @ 50 Pascals 6.25 6.25 CFM @ 25 Pascals 429 429 CFM @ 50 Pascals 673 673 Eff. Leakage Area (sq.in) 36.9 36.9 Specific Leakage Area 0.00036 0.00036 ELA/100 sf shell (sq.in) 1.32 1.32 Leakage to Outside Units ducts CFM @ 25 Pascals 35 CFM25 / CFMfan 0.0394 CFM25 / CFA 0.0487 CFM per Std 152 N/A CFM per Std 152 / CFA N/A CFM @ 50 Pascals 55 Eff. Leakage Area (sq.in) 3.02 Thermal Efficiency N/A Total Duct Leakage Units CFM25/CFA Total Duct Leakage 0.1671 Mechanical Exhaust Only ASHRAE Sensible Recovery Eff. (%) 0.0 62.2-2010 Total Recovery Eff. (%) 0.0 Rate (cfm) 32 22 Hours/Day 24.0 24.0 Fan Watts 5.0 Cooling Ventilation Natural Ventilation