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Deep energy retrofit– case studies Deep Energy Retrofit of 192 units, while occupied by residents 7 story, 500 affordable apartment units, built in the.

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Presentation on theme: "Deep energy retrofit– case studies Deep Energy Retrofit of 192 units, while occupied by residents 7 story, 500 affordable apartment units, built in the."— Presentation transcript:

1 deep energy retrofit– case studies Deep Energy Retrofit of 192 units, while occupied by residents 7 story, 500 affordable apartment units, built in the 1960s, Boston MA. 73% reduction in whole building consumption. DHW: Solar Hot Water Ventilation: Renovation of existing system utilizing Aeroseal technology and Constant Air Regulator (CAR) Dampers. Installation of fresh air trickle vents. 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 The Castle Square Apartments

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

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

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

5 building to minimum standards v. optimal standards

6 what would be optimal standards?

7

8 and what are the actual costs? what you really want to know graphic of cost differences

9 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 dont recognize solar gain, heat recovery, etc

10 case study : Delta Commons at Benning Road

11 case study : an Owners perspective

12

13 case study : an Owners perspective integrated design approach

14 case study : We are like mechanics… 1963 Ford Falcon : 32.5 $.40 /gallon =

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

16 case study (retrofit) : Delta Benning Road

17 case study (retrofit) : Delta Benning Road

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

19 case study (retrofit) : #1 design order of operations: orientation

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

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

22 case study (retrofit) : #2 design order of operations: envelope

23 case study (retrofit) : #2 design order of operations: envelope

24 case study (retrofit) : #2 design order of operations: utilize energy recovery (ERV)

25 case study (retrofit) : #2 design order of operations: utilize energy recovery (ERV)

26 a better way


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