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Efficiency Vermont is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program will be reported to
AIA/CES for AIA members. Certificates of Completion for both AIA
members and non-AIA members are available upon request. !
This program 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. !
Questions related to specific materials, methods, and services will be
addressed at the conclusion of this presentation.
Learning Objectives!At the end of this program, participants will be able to:!
•" Make fair comparisons between window replacement and window retrofit
attachment options.
•" Summarize the key attributes of retrofit window and attachment options
•" Compare window retrofit options on a level playing field
•" Recommend to clients the highest performance, most cost-effective window
retrofit options
Options
Interior
!" Blinds
!" Drapes
!" Roller shades
!" Fixed panel
!" Quilt
!" Cellular shades
!" Films
Replace
!" Full unit
!" Insert
!" Sash replacement
!" Storms
!" Shutters
!" Awnings
!" Roller shades
!" Screens
!" Landscaping
Exterior
Attributes
Thermal
!" Insulation
!" Air tightness
!" Solar heat gain
!" Comfort
!" Condensation resistance
Use
!" Ease of operation
!" Adjustability
!" Ease of cleaning/repair
!" Maintenance/durability
!" Visual transmittance
!" View
!" Daylighting
!" Glare
!" Privacy
!" aesthetics
Visual
Attributes (cont’d)
Economics
!" Materials/equipment costs
!" Installation costs
!" Heating/cooling savings
!" Service life (attachment)
!" Service life (window)
Other
!" Ease of install
!" Availability
!" Acoustics (noise reduction)
!" Role in ventilation
!" Security
NFRC - Attachments
!" Applied Films (label)
!" Awnings
!" Exterior Attachments
!" Interior Attachments
!" Storms (next?)
The LBNL Project !" Advisory Committee – mix of private industry
representatives, expert consultants, LBNL research staff
!" Literature Review – “gray” and “white” information resources
!" Field Testing – Comparative IR imaging under standard conditions & supported by additional metrics
!" Guidance Tools – DOE fact sheets and web-based tool (decision process, including modeling/calculators)
Advisory Committee !" John Gant – Glen Raven
(awnings)
!" Mike Cienian – Hunter Douglas (cellular shades)
!" Steve DeBusk – CP Films (surface-applied films)
!" “honorary” member – Gordon Clements, Gordon’s Décor (cellular shades)
!" Tom Culp (storms)
!" John Carmody & Kerry Haglund (CSBR)
!" Nils Petermann (ASE)
!" LBNL Steve Selkowitz Charlie Curcija Dariush Arasteh Christian Kohler Robert Hart Howdy Goudey
LBNL Literature Review !" Early stages – laboratory testing, field testing, modeling—
it’s pretty early in the game all around
!" Research mosaic – different countries, test methods, base cases, options – it’s a jungle out there.
!" Results alignment – surprisingly good - e.g. Energy Plus and ESP-r
!" Terminology & classification – it’s a jungle out there (two jungles – science community and general public)
!" Quality of manufacturer-posted info
!" Window/attachment interactions
Field Testing !" Obtain visually-compelling, comparative, thermal-
performance portrayals of residential windows with and without the benefit of window retrofits.
!" Achieve this with the combination of thermocouple and heat flux sensors, IR and digital camera images.
!" Develop above into a protocol or standardized test.
interior low-e storm over “vintage” single-pane
wood frame double hung
Interior low-e storm over “base case” double low-
e Ar sash inserts
“base case” dual glazed low-e Ar double
hung sash inserts
storm double IGU double storm triple
Room facing low-e film on single wood framed double
hung with exterior clear storm and !P
Interior low-e storm over “base case” double low-
e Ar sash inserts
Honeycomb shade with side tracks over “base case” double
low-e Ar double hung sash inserts
storm double IGU double + insulating shade storm triple room side low-e
Interior Low-e Storm Over “Vintage” Single-pane Wood Framed Double Hung With Varied Pressure Difference
No !P 10 Pa !P 16 Pa !P
DePaola Home
Existing Conditions
!" 60-year old ranch
!" Madison, WI (7800 HDD)
!" 224 sq. ft. wood, (mostly) double-hung, friction-slides, single-pane
!" Conventional aluminum, triple-track exterior storms
!" Beautiful mahogany window trim (interior)
Issues
!" Storms fog or ice up
!" Cold drafts near windows
!" Double-hungs “stick” or won’t stay open
!" Some windows no longer lock
!" UV degradation
!" Storm operation is also poor
DePaola Home - Options !" Repair
!" Replace
!" Single-pane + Cellular Shade
!" Single-pane + exterior storm low-e
!" Single-pane + interior film
!" Double-pane + one of the above
Modeling !" WINDOW – NFRC
simulation tool from LBNL (free)
!" RESFEN – whole house tool from LBNL (free)
!" HomeEnergySaver (HES) & HESPro
DePaola Home - Decision !" Repair – yes, but went beyond to get more of what
they wanted
!" Insulating shades – did not solve enough issues and they did not like the aesthetics
!" Interior storm – no: still need weather-protection of x-storm; no ventilation; other issues unchanged
!" New low-e storms – not enough ROI, still operation problems with existing sashes
!" WINNER – sash replacement (over inserts or full replacement)
Tell us where you live. 01501
Notes: This question determines relevant climate conditions.
Back Next Get Results
Zip Code:
Check all special conditions that apply:
! Wind"
!""Snow load
! Window protection (catastrophic weather)"
! I rent or live in a condo
! My house is in a historical district"
Notes: This question helps determine vital features of the final results. For example if Window protection is needed then exterior storms and/or exterior roller blinds will be recommended.
Back Next Get Results
What are your biggest issues?
Notes: Results can be narrowed using this table. Ranking the requirements allows the tool to focus on the most important issues.
Back Next Get Results
1st 2nd 3rd N/A
Fading !
Hurricane protection !
Condensation !
Security !
Storm protection !
Solar heat gain !
Drafty windows !
Glare !
Privacy !
Heat loss !
Windows don’t work !
do
Determinate Existing Conditions
Notes: These questions may be used to determine cost/savings analysis for later versions of the tool.
Back Next Get Results
Scope of Retrofit: Windows
Total Number of Windows
OR
West facing windows
East facing windows
South facing windows
North facing windows
Scope of Retrofit: Area
Option 1: Total sq. ft. of window area
Option 2: Total sq. ft. of floor area
! Low window to floor area ratio ! Medium window to floor area ratio ! High window to floor area ratio
Window Condition
! Brand New ! Must be replaced for safety/fogging ! Performance properties
7 95
Notes: Some retrofit options will be ignored (or greyed out) depending on the budget input.
Back Next Get Results
How much are you willing to spend?
#" Total $
OR
#" $ per sq. ft. of window
OR
#" $ per window 500
do
Notes: This page shows the top 4 results along with a summary of answered questions.
Back
Ranked Results
! Exterior Metal Rolling Shutter
! Exterior Storm (tinted)
! Exterior Fabric Roller Shade
! Interior Roller Shade
01501 Zip Code:
Special conditions:
! Wind"
! Window protection (storm)
Total Number of Windows
Total sq. ft. of window area
Window Condition ! Brand New
7
95
1st 2nd 3rd
Fading !
Hurricane protection !
Security !
Solar heat gain !
Privacy !
$ per window 500
Summary
Compare Results
do
Notes: This is an example page of a specific window treatment.
Back
Best Option
Exterior Metal Rolling Shutter
Attributes:
Caveats:
do
Notes: This is an example page of a specific window treatment options compared.
Back
Exterior Metal Rolling Shutter
Attributes:
Caveats:
Exterior Storm (tinted)
Attributes:
Caveats:
Results Comparison
Coming Soon! !" Website (downloadable fact sheets)
!" Web tool
!" Summer (shade) IR-based field testing
Course Evaluations!
In order to maintain high-quality learning experiences, please access the evaluation for this course by logging into CES
Discovery and clicking on the Course Evaluation link on the left side of the page.