1. 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.

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 2

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

4. 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

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

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

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

8. 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

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 don’t recognize solar gain, heat recovery, etc
Prescott

10. case study: Delta Commons at Benning Road
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 11

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

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

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

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

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

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

18. 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

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

20. #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

21. 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

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

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

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… 24

25. #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

26. a better way
Bruce continues intro/global view 26