The Castle Square Apartments deep energy retrofit– case studies The Castle Square Apartments Deep Energy Retrofit of 192 units, while occupied by residents 7 story, 500 affordable apartment units, built in the 1960’s, Boston MA. 73% reduction in whole building consumption. Heating: 94.5% efficient condensing boilers and indirect hot water storage tanks with hydronic baseboards in each unit. Cooling: Energy Star AC units, 7800 Btu/hour cooling capacity, 9.9 EER DHW: Solar Hot Water Ventilation: Renovation of existing system utilizing Aeroseal technology and Constant Air Regulator (CAR) Dampers. Installation of fresh air trickle vents. http://www.castledeepenergy.com

Case studies / Cost benefit: 64,583 sf office cost 20% less than construction average 80% energy savings Energon Offices, Ulm, 2003 Architect; Stephan Oehler 2

Case studies / Cost benefit: Not planned as PH, therefore not designed or oriented for solar gain Still only 5% more than construction average 3

Case studies / Cost benefit: No additional cost mechanical systems cost approximately €150,000 less Savings were invested in Passivhaus Standard windows and additional insulation Montessori school: Architects: Walbrunn / Grotz / Vallentin. 4

building to minimum standards v. optimal standards Do Energy Star, Earthcraft, or EGC prevent comfort or moisture problems? 5

what would be optimal standards? If we followed the .6 ACH50 6

what would be optimal standards? And got the insulation to the themal levels of Passive House 7

graphic of cost differences and what are the actual costs? what you really want to know graphic of cost differences Need to get these this monday We are comparing against EGC, and Earthcraft 8

challenges we have not cracked the utility allowance nut yet trades crews are still coming along we still have to prove we are meeting lower energy standards individual metering direct hood exhaust inferior models don’t recognize solar gain, heat recovery, etc Prescott

case study: Delta Commons at Benning Road Blaise Intro to Delta Commons IV from a developers view

case study: an Owners perspective Blaise Intro to Delta Commons IV from a developers view 11

case study: an Owners perspective Blaise Intro to Delta Commons IV from a developers view 12

integrated design approach case study: an Owners perspective integrated design approach Blaise Intro to Delta Commons IV from a developers view 13

case study: We are like mechanics… Matt Specific descriptions etc… 1963 Ford Falcon : 32.5 MPG @ $.40 /gallon = 14

case study: The efficiency of these buildings needs to sustain the welfare of its residents… Matt Specific descriptions etc… 2014 Honda Fit EV: 118e MPG @ $3.38/gallon= 15

case study (retrofit): Delta Commons @ Benning Road Matt Specific descriptions etc… 16

case study (retrofit): Delta Commons @ Benning Road Matt Specific descriptions etc… 17

case study: Delta Commons @ Benning Road Passive House principles revisited orientation super-insulate/air seal (envelope), and utilize ERV Matt Specific descriptions etc… optimize window performance utilize passive space conditioning utilize high efficiency active strategies 18

#1 design order of operations: orientation case study (retrofit): #1 design order of operations: orientation Matt Specific descriptions etc… 19

#1 design order of operations: orientation case study (retrofit): #1 design order of operations: orientation Matt Specific descriptions etc… we can not turn the buildings, => regulate solar gain (as best practically) with shading assemblies ly 20

response to solar gain: shading assemblies case study (retrofit): response to solar gain: shading assemblies JANUARY 29, 10a APRIL 21, 10a Matt Specific descriptions etc… JULY 21, 10a OCTOBER 21, 10a 21

#2 design order of operations: envelope case study (retrofit): #2 design order of operations: envelope Matt Specific descriptions etc… 22

#2 design order of operations: envelope case study (retrofit): #2 design order of operations: envelope Matt Specific descriptions etc… 23

#2 design order of operations: utilize energy recovery (ERV) case study (retrofit): #2 design order of operations: utilize energy recovery (ERV) Matt Specific descriptions etc… 24

#2 design order of operations: utilize energy recovery (ERV) case study (retrofit): #2 design order of operations: utilize energy recovery (ERV) Matt Specific descriptions etc… 25

a better way Bruce continues intro/global view 26