Mastering Passive House Assembliesmidwestenergyconference.com/Horton.pdf · Slide 2 SDM5 This slide template is a suggested way of introducing yourself to your audience. We are keeping

Mastering Passive House Assemblies

Mastering Passive House Assemblies Brandon Weiss and Jason LaFleur

Meet Your Speakers

Jason LaFleurEco Achievers

Brandon WeissEvolutionary Home Builders

2013 Master Certified Green Pro of the year,

2012 Northern IL HBA Builder of the Year,

PHIUS Certified Builder, Graduate Master Builder, WELL AP, Living Future Accredited, LEED AP, Master CGP, BPI Certified Building Analyst

Certified Passive House Consultant (CPHC),PHIUS+ Rater,PHIUS+ Large Building Verifer,NGBS Green Verifier,LEED Green Rater,RESNET HERS Rater

SDM5

Slide 2

SDM5 This slide template is a suggested way of introducing yourself to your audience. We are keeping it simple here -matching a name and company with a face. We reserved the contact information slide until the end when you are wrapping up your presentation.Sober DeNio, Monica, 11/20/2016


Session Description

Passive houses are increasing in popularity within the building community, and during this session, you will hear from a builder and rater who has constructed and tested multiple passive house assemblies. Data from one multifamily and five single-family passive houses constructed with different assemblies in the Chicago metro area will be shared, as well as challenges and lessons learned. Discover what works and what doesn't, and uncover the secrets to meeting the aggressive performance standards of a passive house.


Session Learning Outcomes

• Review the goals and key principles of passive house construction.

• Analyze passive house wall assembly materials and construction

techniques.

• Explore and compare costs, advantages, and disadvantages of

passive house wall assemblies and details.

• Discuss lessons learned from certified Passive house case studies.


Credit(s) earned on completion of this course will be reported to AIA CES for AIA members upon completion of the AIA/CES Session Participation Forms found in the back of this session room and online at www.BuildersShow.com. Certificates of Completion for both AIA members and non-AIA members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

American Institute of Architects (AIA) Continuing Professional Education


Image

A typical day at the office


Image

A(nother) typical day at the office.



May 2013


May 2013As of Jan 21, 2016

38% of all new homes sold in the nation


Institute for Market Transformation www.imt.org


• 32 homes

• Ages 107 – 4 years old

• 2%-5% sales price premium

Real Estate Valuation


• 43 homes with solar PV

• Across 6 states

• $3.78 per watt premium

https://emp.lbl.gov/

Home Value + Solar

$3.57 per watt installed cost (Oct 2016)


River Forest, IL

PHIUS Certified

0.40 [email protected] kBTU/ft2yrHERS 27

R25 ICF Wall Construction6” EPS (R24)

R80 blown cellulose attic6” EPS sub slab

2 ductless mini splits1 ducted ERV

Solar thermal DHWHeat pump hot water


$2,649 Baseline Utility Costs$1,052 As-Built Utility Costs

$1,597 annual savings


The Appraiser’s Green ToolkitNet Present Value (NPV) HERS = 27

– REM Rate reference home: $2,649 – REM Rate Passive House: $1,052 ($1,597 savings)

Appraiser used to support energy adjustment of 4%More at www.ecoachievers.com/toolkit

Term Rate Savings Present Value30 yr 4% $1597 $27,6150


It’s Okay!

Have your clientWrite a Letter toTheir Lender to request a Competent Appraiser!

More at www.ecoachievers.com/toolkit


Question 1: What is the biggest barrier for you to build high performance?a. Too expensiveb. Energy cost savings doesn't matter to my clientsc. Real estate valuation not accounting for high

performanced. Clients focused on construction cost, not operating

costse. None of my competition is doing high performance


Getting technical

Baselines Vary


Baselines Vary


The Continuum from Green to Sustainable



Question 2: What green certifications have you built to (choose multiple is okay)?a. HERS Ratingb. ENERGY STAR or DOE Zero Energy Ready Home

programc. Local green building programd. LEEDe. NGBS ICC-700f. Passive House / PHIUS


Passive House Delivers Savings


Principles of Passive House1. Super Envelope

– Control the sun– Airtight– Thermal bridge free

2. No cold surfaces (MRT)3. Minimal Mechanicals4. Balanced Ventilation5. Modeled & Tested

PERFORMANCE


PH or : Should performance adjust for climate?


The Pillars of Passive House: Performance Metrics

Annual Heating Demand4.75 kBtu/sf/yr

~ 5.8 kBtu/sf/yr Heating4.2 kBtu/sf/yr Cooling

Primary Energy Demand38 kbtu/sf/yr

~ Peak Heating Load: 5.0 btu/sf Peak Cooling Load: 4.2 btu/sf

Air Tightness0.60 ACH 50

~0.05 CFM50 /

shell area


Super Envelope: Foundation Insulation

Typically 2-4” on Foundation walls and under slab.


Super Envelope: Foundation InsulationFrost-Protected Shallow FoundationFoam bathtub isolates basement slab


Thick Walls

Super Envelope: Insulation2 layers of 2” thick rockwool panels

4” EPS


Super Envelope: Thermal Bridging Details

ICF Brick Ledge w/ top chord bearing truss 4” exterior polyiso “outsulation” on 2x6 24 o.c.


PHIUS+ Certified Windows

• Ask about R-value• Thermally broken frame• Most are tilt-turn style• Few domestic options

Many installs use affordableU-0.21 (R5) windows.

Super Envelopes: Passive House Windows


Never can have enough exterior window shading!

Rainscreens actually reduce radiant heat gain too

Easy to control windows facing N and SWindow SHGC can be fine-tuned

depending on exposure

Super Envelope: Radiant Energy Control


A little bit of shadinggoes a long way…

Radiant Gain


Super Envelope: Rigorous Air Infiltration


Passive House Blower Door Testing

Rough Test Final test

Pressurization Test Results


Super Envelope: Multifamily Air Infiltration tests


a. Never had a blower door testb. > 5.0 ACH @ 50 pac. Between 2.5 and 5.0 ACH @ 50 pad. Between 1.0 and 2.5 ACH @ 50 pae. Between 0.60 and 1.0 ACH @ 50 paf. < 0.60 ACH @ 50 pa

Question 3: What is the tightest infiltration rate your homes have achieved?


Air Barrier Fail: Yay for spray foam!

Except air still flows here! (7.23 ACH 50 / 0.32 CFM50 per sq ft enclosure)

Underside of Cantilivered Floor

Installation Matters.


Super Envelope: Air Barrier Choices Abound!

FluidSheetTapeSealantsFoam ConcretePlastic How do they perform?


6 Projects / Assemblies (CZ 5 and 6)


Constructed in 2012; River Forest, ILSquare footage: 4763 sfVolume: 46,023 cfHERS: 27Project Team: Brandon Weiss and

Tom Basset-DilleyAir barrier: ICF walls, plywood w/SIGA ceiling

1. Chicago’s First Passive House

MCT = 0.50 ACH 50


Constructed in 2014; River Forest, IL4,766 sf; Volume: 42,364 cfRHERS: 31Project team: Brandon Weiss

and Patrick DanaherAir barrier: Prosoco walls, plywood w/SIGA ceiling

2. Adaptation House

MCT = 0.40 ACH 50


ROOF: R-8214” TJI w/dense-pack fiberglass,plywood sheathing/air barrier,5” polyiso,plywood roof deck

WALL: [email protected]. w/ dense-pack fiberglass,plywood sheathing/air barrier,4” polyiso,rainscreen sidingSLAB: R-274” conc o/6” EPS;ring beam per ASCE w/4” EPS in/6” out

Constructed in 2015; Oak Park, IL1,854 sf; Volume: 16,418 cf2x8 24 oc; R22 cavity + R28 4” polyisoR82 roof; 6” EPS (R27) slab HERS: 31

Project team: Brandon Weiss and Tom Bassett-Dilley

Air barrier: Prosoco walls, sealed attic

3. Right-Sized Home

MCT = 0.46 ACH 50


Constructed in 2016; Madison, WI2x6 R21 Batt; 4” Polyiso (R28) R50 above deck; R10 slab37,323 sq ft Volume: 313,052 cu ftHERS: -15* (projected)Project team: Heartland HousingAir barrier: Tremco

4. Madison Supportive Housing

MCT = 0.35 ACH @ 50


Constructed in 2015; Chicago, IL2x6 staggered on 2x8 plate; R27R50 attic, R10 2” xps slab2,460 sf; Volume: 24,376 cfHERS: 45Project team: Greenline Dev. Air barrier: Henry Blueskin

5. Greenline #8 (Spec home non-PH)

MCT = 1.2 ACH 50


Constructed in 2015; Chicago, IL2x6 staggered on 2x8 plate; R27R50 attic, R10 2” xps slab3,753 sf; Volume: 40,729 cfHERS: 54 Project team: Greenline Dev. Air barrier: Henry Blueskin

Compartmentalization: caulking

6. Greenline 2-flat (non-PH)

MCT = 1.2 ACH 50


Air Barrier Testing ResultsProject Chicago’s

First PHAdaptation Home

Right Sized Madison MSH60-units

Non-PH Spec Home

Non-PH Custom

Year 2012 2014 2015 2016 2015* 2015*Air Barrier ICF + SIGA

tapeProsocoR-Guard

ProsocoR-Guard

Tremco Henry Blueskin / stagger stud

Henry Blueskin / stagger stud

Area (sf) 4,763 4,766 1,854 37,323 2,460 3,753Volume (cf) 46,023 42,364 16,418 313,052 24,376 40,729Mid CFM50 384 283 129 1067 517 864Mid ACH50 0.50 0.40 0.46 0.35 1.27 1.27Final CFM50 214 233 113 2188 235 588

Final ACH50 0.38 0.33 0.43 0.42 0.58 0.57

CFM50 Post % improved

44.3% 17.7% 12.4% -105% 54.5% 31.9%

ACH50 Post % improved

44.0% 17.5% 6.5% -20% 54.3% 55.1

Mastering Passive House Assemblies Brandon Weiss and Jason LaFleurThe Secret to Meeting Passive House:


a. Housewrap (e.g. Tyvek, HomeSlicker, etc)b. Continuous foamboard with taped seamsc. ZIP panelsd. Butyl-based adhesive wrap (e.g. Blueskin, etc)e. Fluid applied (e.g. Sto, Prosoco, etc)f. Other

Question 4: What is your preferred air barrier approach?


Thermal Bridging ControlRadiant Heat Gain ControlMoisture ControlAir Leakage ControlEnergy Resilience

Passive House Bonus: Vapor Control = Less Risk!With < 5.0 ACH, no vapor barrier needed. (IRC)Let your walls dry in either direction.

Envelope Summary: CONTROL


Mechanicals in a Passive House

Look through hole to determine exact size


Mechanicals in a Passive House

Cooling loads will drive system sizing (even in WI)

Ductless Mini Split VRF (multifamily) Ducted ERV


Located in ceiling of second floor hall.

Short runs supply each bedroom

Central return.Ventilation supply air

ducted separately

Ducted Mini-Split Heat Pump

SDM6

Slide 54

SDM6 This slide is a sample layout and it is not required, just a suggestion. Please feel free to be as creative as you would like while keeping it easy to read when projected onto a large screen. Make your font sizes as large as possible, keeping in mind education rooms at the IBS typically accommodate 250+ attendees. Less is more when it comes to words on your PowerPoints slides in this setting. Save your real meat for your handouts. Attendees are very grateful for meaty handouts so they can focus on listening to you speak, rather than taking notes.Sober DeNio, Monica, 11/20/2016


Radiant panels throughout as much as possible.

Ventilation ducted separately.

Dehum ventilation system to manage humidity.

Radiant heating and cooling


a. No mechanical ventilation (just operable windows)b. Supply-side motorized damper / AirCyclerc. Continuous exhaust fand. Balanced (e.g. ERV or HRV)

Question 5: What is your standard ventilation system?


Typical PH design:Separate ventilationSupply fresh air to bedroomsExhaust baths, kit area, laundry

Balanced VentilationVia ERV is Critical

January 2015 issue Fine Homebuilding


Humid Climates:Must dehumidify ventilation air

Ventilation Install must meet Design


Distribution per Zero Energy Ready HomeHeat pump water heatersCO2 water heaters

Hot Water Efficiency


Avg 5%-7% premium to buyerReduce your warranty costsNot only premium for energy

but top-quality products“Cash-flow positive” from Month 1

What about Cost?

www.gologic.us


a. Continuous insulationb. Advanced air barrier system to get below 1.0 ACH @ 50 pac. Balanced ventilation (ERV or HRV)d. Pursue an entire Passive House

Question 6: What will you explore differently for your next project?


Let’s Connect.Jason LaFleurEco AchieversChicago, ILTwitter: @[email protected]/EcoAchievers

Brandon WeissEvolutionary Home BuildersGeneva, [email protected]

Resources

www.PassiveHouse.us

Passive House Training:www.PHAUS.orgwww.PassiveHouseAcademy.org

Green Real Estate:www.EcoAchievers.com/Toolkit

Documents

Mastering Passive House Assembliesmidwestenergyconference.com/Horton.pdf · Slide 2 SDM5 This slide template is a suggested way of introducing yourself to your audience. We are keeping