Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 ·...
Transcript of Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 ·...
![Page 1: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/1.jpg)
Upping the Ante:Affordable, Multifamily Passive
Housing through Integrated DesignDylan Lamar, Intern Architect, CPHC
Alex Boetzel, Construction Manager, CPHC
7th Annual North American Passive House ConferenceSeptember 27-30, 2012 Denver CO
![Page 2: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/2.jpg)
Session Learning Objectives:• Learn about current progress on affordable, multifamily
Passive House work in Portland, Oregon• Better understand an Integrated Design process in
implementing the Passive House standard to this building type
• Understand key details of implementing the Passive House standard on this project
7th Annual North American Passive House ConferenceSeptember 27-30, 2012 Denver CO
![Page 3: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/3.jpg)
The Location
6.2 acre parcel in Hillboro, OR
Affordable, Multifamily Passive Housing through Integrated Design
![Page 4: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/4.jpg)
The Site
General text
master plan
Affordable, Multifamily Passive Housing through Integrated Design
![Page 5: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/5.jpg)
The Orchards at Orenco
• Total build out: 150 units in 2‐3 phases.• Phase 1: 57 units. • The total building size is 56,965 sq ft., 40,968 of
that is for the units and the rest is common, circulation, mechanical and electrical.
• The unit breakdown is 41‐ 1 Bedrooms and 16‐ 2 Bedrooms for a total of 57 units.
• Target market: workforce housing
Affordable, Multifamily Passive Housing through Integrated Design
![Page 6: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/6.jpg)
Affordable Housing
• Target population: 50% AMI ($32,400 family of 3)• Rents approximately $650‐$775 • $1/sf/month roughly 1/2 of adjacent market rate development• Utility Cost 1/2 of County allowance $23‐29/month
Affordable, Multifamily Passive Housing through Integrated Design
![Page 7: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/7.jpg)
PROJECT TEAM
Client: REACH Community DevelopmentProject Manager: Housing Development CenterArchitect: William Wilson ArchitectsPassivhaus Consultant: Green Hammer Design‐BuildMEP Consultants: PAE Consulting EngineersContractor: Walsh Construction
Affordable, Multifamily Passive Housing through Integrated Design
![Page 8: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/8.jpg)
INTEGRATED DESIGN PROCESS
• CPHC brought onto project at Conceptual Design phase
Affordable, Multifamily Passive Housing through Integrated Design
• Increased cost‐effective decision‐making
• Allowed collaborative relationships to form before major design decisions were made (i.e. siting/massing)
• Sustainable Goal‐Setting Charrette
• Included project and community stakeholders
• Highlighted key challenges / proposed some solutions through group discussion
![Page 9: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/9.jpg)
INTEGRATED DESIGN PROCESS
Affordable, Multifamily Passive Housing through Integrated Design
• Bi‐weekly meetings held to allow group design process
DESIGNDECISIONS
ENERGY MODELING
COST ESTIMATING
FACILITATEDGROUP
DISCUSSION
![Page 10: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/10.jpg)
DESIGN & ENERGY MODELING
• Early Decisions: Simplify the Problem
Affordable, Multifamily Passive Housing through Integrated Design
• Elevator, laundry rooms, garbage chutes removed from thermal envelope• Minimize envelope assembly variations & complexity
![Page 11: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/11.jpg)
DESIGN & ENERGY MODELING
Section view of unconditioned spaces
Affordable, Multifamily Passive Housing through Integrated Design
![Page 12: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/12.jpg)
DESIGN & ENERGY MODELING
• Early Decisions: Simplify the Problem
Affordable, Multifamily Passive Housing through Integrated Design
• Recirculating range hoods + HRV boost in kitchen & bathroom• Plumbing vents & roof drains aggregated in discrete, insulated “cold stacks”
• Early Decisions: Occupant Control
• Thermostat in each unit• Ventilation boost
![Page 13: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/13.jpg)
Schematic Envelope Assembly Investigations
![Page 14: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/14.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
• Fenestration design is uniform since units have single exterior wall• Exterior shading varies by orientation
![Page 15: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/15.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
• Explored climbing vines as a shading element for east/west orientations
• No active cooling: passive night ventilation primary cooling strategy
![Page 16: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/16.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
• Consultant’s biggest challenge: exploring myriad design options and digesting complexity of the PHPP into clear and succinct deliverables
![Page 17: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/17.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
![Page 18: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/18.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
![Page 19: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/19.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
![Page 20: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/20.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
![Page 21: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/21.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
![Page 22: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/22.jpg)
DESIGN & ENERGY MODELING
Affordable, Multifamily Passive Housing through Integrated Design
• Energy feedback kiosks to help inform residents…
![Page 23: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/23.jpg)
What will it cost?
• Initial estimates (not Passive House): $131/sf• versus $150/sf (built to PH standard)• Working to VE to $144/sf
Affordable, Multifamily Passive Housing through Integrated Design
![Page 24: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/24.jpg)
How to pay for it?
• Incentives: Energy Trust of Oregon• incentivizes soft costs and “cost effective” EEMs• Superinsulation is not considered cost effective
• Grants• more access to funds through cutting edge of PH and TOD• It can be replicated
• Higher compensation for Low Income Housing Tax Credit• more interest by investors because of PH
Affordable, Multifamily Passive Housing through Integrated Design
![Page 25: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/25.jpg)
How to quantify other financial benefits of PH?
Passive House reduces Vacancy?• Industry standard is 93% occupancy• Will more comfort result in higher occupancy?• An increase by 5% would result in $25,000
additional revenue • Simple payback 30 years
Passive House reduces Maintenance?• If maintenance cost are reduced by 20%• Simple payback will be 20 years
Affordable, Multifamily Passive Housing through Integrated Design
![Page 26: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/26.jpg)
Air-Tightness in MultifamilyPassive House Buildings
Built project in the projects in the Pacific Northwest by Walsh Construction:
• Sitka Apartments• Pearl Family Housing• UW Poplar• UW Alder
Affordable, Multifamily Passive Housing through Integrated Design
![Page 27: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/27.jpg)
Sitka Apartments
• 1.6 ACHnatural• 2006
Affordable, Multifamily Passive Housing through Integrated Design
![Page 28: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/28.jpg)
Pearl Family Housing• 0.22 cfm/sf (1.2 ACH50?)• 2010
Affordable, Multifamily Passive Housing through Integrated Design
![Page 29: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/29.jpg)
UW Poplar Hall• 0.29 cfm/sf (1.6 ACH50?)• 2011
Affordable, Multifamily Passive Housing through Integrated Design
![Page 30: Upping the Ante: Affordable, Multifamily Passive Housing through Integrated … · 2018-12-12 · Upping the Ante: Affordable, Multifamily Passive Housing through Integrated Design](https://reader036.fdocuments.in/reader036/viewer/2022081406/5f115fc455ddfb7f443deffc/html5/thumbnails/30.jpg)
UW Alder Hall• 0.18 cfm/sf (<1 ACH50?)• 2012
Affordable, Multifamily Passive Housing through Integrated Design