What Should I Do About My Windows? Peter Yost BuildingGreen February 9, 2011

Transcription

1 What Should I Do About My Windows? Peter Yost BuildingGreen February 9, 2011

2 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.

3 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

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5 What to do about my windows? Options Attributes

6 Options Interior!" Blinds!" Drapes!" Roller shades!" Fixed panel!" Quilt!" Cellular shades!" Films Exterior!" Storms!" Shutters!" Awnings!" Roller shades!" Screens!" Landscaping Replace!" Full unit!" Insert!" Sash replacement

7 Attributes Thermal Visual Use!" Insulation!" Air tightness!" Solar heat gain!" Comfort!" Condensation resistance!" Visual transmittance!" View!" Daylighting!" Glare!" Privacy!" aesthetics!" Ease of operation!" Adjustability!" Ease of cleaning/repair!" Maintenance/ durability

8 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

9 NFRC - Attachments!" Applied Films (label)!" Awnings!" Exterior Attachments!" Interior Attachments!" Storms (next?)

10 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)

11 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

12 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

13 Field Testing!" Obtain visually-compelling, comparative, thermalperformance 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.

14 Field Test Site

15 Field Test Site

16 Field Test Window

17 Test Team

18 Test Setup Equipment credit: Nathan Yost

19 What the Window Sees

20 Double-pane low-e, no attachment, -20 Pa

21 Interior Storm Panel single-pane

22 Insulated cellular shade (ST), double-pane low-e

23 Window quilt, low-e double pane

24 Single-pane, no attachment

25 storm double storm triple IGU double interior low-e storm over vintage single-pane wood frame double hung Interior low-e storm over base case double lowe Ar sash inserts base case dual glazed low-e Ar double hung sash inserts

26 storm double room side low-e storm triple IGU double + insulating shade 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 lowe Ar sash inserts Honeycomb shade with side tracks over base case double low-e Ar double hung sash inserts

27 Interior Low-e Storm Over Vintage Single-pane Wood Framed Double Hung With Varied Pressure Difference No!P 10 Pa!P 16 Pa!P

28 Interior screen (Inflector) radiant side in (winter)

29 Interior storm Indow Window

30 Interior storm panel (WindowSaver)

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33 Home Energy magazine: July/August 2002

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35 DePaola Home Existing Conditions!" 60-year old ranch!" Madison, WI (7800 HDD)!" 224 sq. ft. wood, (mostly) double-hung, frictionslides, 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

36 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

37 Modeling!" WINDOW NFRC simulation tool from LBNL (free)!" RESFEN whole house tool from LBNL (free)!" HomeEnergySaver (HES) & HESPro

38 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)

39 Window Retrofit Web-based Tool Wireframes

40 Tell us where you live. Zip Code: Back Get Results Next Notes: This question determines relevant climate conditions.

41 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" Back Get Results Next 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.

42 What are your biggest issues? 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! Back Get Results Next Notes: Results can be narrowed using this table. Ranking the requirements allows the tool to focus on the most important issues.

43 Determinate Existing Conditions Scope of Retrofit: Windows Scope of Retrofit: Area Total Number of Windows OR 7 Option 1: Total sq. ft. of window area 95 Option 2: Total sq. ft. of floor area do West facing windows East facing windows South facing windows North facing windows! 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 Back Get Results Next Notes: These questions may be used to determine cost/savings analysis for later versions of the tool.

44 How much are you willing to spend? #" Total $ OR #" $ per sq. ft. of window OR #" $ 500 per window Back Get Results Next Notes: Some retrofit options will be ignored (or greyed out) depending on the budget input.

45 Ranked Results! Exterior Metal Rolling Shutter Zip Code: Summary 01501! Exterior Storm (tinted)! Wind" Special conditions:! Exterior Fabric Roller Shade! Window protection (storm) do! Interior Roller Shade Total Number of Windows Total sq. ft. of window area 7 95 Compare Results Back 1st 2nd 3rd Fading! Hurricane protection! Security! Solar heat gain! Privacy! Window Condition! Brand New $ per window 500 Notes: This page shows the top 4 results along with a summary of answered questions.

46 Best Option Exterior Metal Rolling Shutter Attributes: do Caveats: Back Notes: This is an example page of a specific window treatment.

47 Results Comparison Exterior Metal Rolling Shutter Exterior Storm (tinted) Attributes: Attributes: Caveats: Caveats: do Back Notes: This is an example page of a specific window treatment options compared.

48 Coming Soon!!" Website (downloadable fact sheets)!" Web tool!" Summer (shade) IR-based field testing

49 The R-value of a Vermont Cat

50 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.

51 BuildingGreen, Inc. " Founded in 1985 " " " " Based in Brattleboro, Vermont 20 employees Supported by subscriptions, book sales, online memberships Does not carry advertising BuildingGreen offices in the old Estey Organ Factory, Brattleboro