Deep energy retrofit– case studies
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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.

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Deep energy retrofit case studies

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

Case studies / Cost benefit:

  • 64,583 sf office

  • cost 20% less than construction average

  • 80% energy savings

Energon Offices, Ulm, 2003

Architect; Stephan Oehler


Case studies cost benefit1

Case studies / Cost benefit:

  • Not planned as PH, therefore not designed or oriented for solar gain

  • Still only 5% more than construction average


Deep energy retrofit case studies

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.


Deep energy retrofit case studies

building to minimum standards v. optimal standards


Deep energy retrofit case studies

what would be optimal standards?


Deep energy retrofit case studies

what would be optimal standards?


Deep energy retrofit case studies

and what are the actual costs?what you really want to know

graphic of cost differences


Deep energy retrofit case studies

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


Deep energy retrofit case studies

case study: Delta Commons at Benning Road


Deep energy retrofit case studies

case study: an Owners perspective


Deep energy retrofit case studies

case study: an Owners perspective


Deep energy retrofit case studies

case study: an Owners perspective

integrated design approach


Deep energy retrofit case studies

case study: We are like mechanics…

1963 Ford Falcon : 32.5 MPG @ $.40 /gallon =


Deep energy retrofit case studies

case study: The efficiency of these buildings needs to sustain the welfare of its residents…

2014 Honda Fit EV: 118e MPG @ $3.38/gallon=


Deep energy retrofit case studies

case study (retrofit):

Delta Commons @ Benning Road


Deep energy retrofit case studies

case study (retrofit):

Delta Commons @ Benning Road


Deep energy retrofit case studies

case study: Delta Commons @ Benning Road

Passive House principles revisited

  • orientation

  • super-insulate/airseal (envelope), and utilize ERV

  • optimize window performance

  • utilize passive space conditioning

  • utilize high efficiency active strategies


Deep energy retrofit case studies

case study (retrofit):

#1 design order of operations: orientation


Deep energy retrofit case studies

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


Deep energy retrofit case studies

case study (retrofit):

response to solar gain: shading assemblies

JANUARY 29, 10a

APRIL 21, 10a

OCTOBER 21, 10a

JULY 21, 10a


Deep energy retrofit case studies

case study (retrofit):

#2 design order of operations: envelope


Deep energy retrofit case studies

case study (retrofit):

#2 design order of operations: envelope


Deep energy retrofit case studies

case study (retrofit):

#2 design order of operations:

utilize energy recovery (ERV)


Deep energy retrofit case studies

case study (retrofit):

#2 design order of operations:

utilize energy recovery (ERV)


Deep energy retrofit case studies

a better way


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