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WEATHERIZATION ASSISTANCE PROGRAM

WEATHERIZATION ASSISTANCE PROGRAM. Weatherization Assistance Program Standardized Training Curriculum August 2010. Mobile Home Training. Introduction to Mobile Homes. MOBILE HOME TRAINING. WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010.

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WEATHERIZATION ASSISTANCE PROGRAM

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  1. WEATHERIZATION ASSISTANCE PROGRAM Weatherization Assistance Program Standardized Training Curriculum August 2010 Mobile Home Training

  2. Introduction to Mobile Homes MOBILE HOME TRAINING WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010

  3. By attending this session, participants will become aware of: The history and development of mobile homes Construction details and materials related to mobile homes Problems related to energy efficiency of mobile homes Differences between pre- and post-1976 mobile homes Standard weatherization priorities for mobile homes Opportunities for improving comfort, safety, and energy efficiency Benefits of various retrofit options Learning Objectives INTRODUCTION TO MOBILE HOMES

  4. Opportunities Mobile homes comprise at least 25% of the households that qualify for Weatherization nationwide Advances in Weatherization materials and retrofit techniques open up huge opportunities for energy savings INTRODUCTION TO MOBILE HOMES Photo courtesy of the US Department of Energy

  5. Some Mobile Home Characteristics Wooden frame bolted to a steel chassis Constructed in long narrow segments in a factory; delivered and completed on site Shallow roof cavities Interior panels provide structural rigidity Single framing for door and window openings Sealed combustion heating systems INTRODUCTION TO MOBILE HOMES

  6. Mobile Home Belly System INTRODUCTION TO MOBILE HOMES Photo courtesy of PA WTC

  7. Mobile Home Components #1 INTRODUCTION TO MOBILE HOMES • Main beam • Outrigger beam • Rodent barrier • Floor joists Lengthwise Floor Joist System 4 1 3 2 Crosswise Floor Joist System

  8. Mobile Home Components #2 INTRODUCTION TO MOBILE HOMES 12 8 4 8 11 7 9 3 6 5 10 2 1 • Main beam • Band joist • Rough window opening • Bowstring trusses • Floor joists • Heating/AC duct • Top plate • Ceiling joist cavity • Wall section • Rough door opening • Vapor barrier • Blown-in insulation

  9. Mobile Home Components #3 INTRODUCTION TO MOBILE HOMES Wall Detail Furnace Installation Photo courtesy of PA WTC Photo courtesy of PA WTC

  10. Problems and Opportunities #1 Mobile homes built before 1976 consume 1.5 to 2 times more energy than a site-built home. Why? Low thermal mass (thin and poorly insulated floors, walls, and ceilings) Conductive materials (metal windows and door frames) Large open areas and penetrations in the floor system High surface-to-floor area ratio Poor duct design, components, and installation INTRODUCTION TO MOBILE HOMES Photos courtesy of PA WTC

  11. Problems and Opportunities #2 INTRODUCTION TO MOBILE HOMES Photo courtesy of PA WTC

  12. Problems and Opportunities #3 INTRODUCTION TO MOBILE HOMES Photo courtesy of PA WTC

  13. Problems and Opportunities #4 INTRODUCTION TO MOBILE HOMES How many mobile home junk yards have you seen recently? Photo courtesy of PA WTC

  14. Problems and Opportunities #5 INTRODUCTION TO MOBILE HOMES “Oh boy, do we have deal for you!” Photo courtesy of PA WTC

  15. Mobile Home Construction Eras Pre-HUD Code (before 1976) Little or no insulation (less than R-6) 2 x 2 or 2 x 3 stud walls Jalousie windows HUD Code and upgrades (post-1976) Set insulation standards per climate zones 2 x 4 exterior walls and single-hung slider windows Bathroom and kitchen exhaust fans Vapor barriers in ceiling R-8 or better insulation levels INTRODUCTION TO MOBILE HOMES Construction era should drive retrofit strategies Photo courtesy of PA WTC

  16. Determining the Construction Era INTRODUCTION TO MOBILE HOMES Data Plate Identifying post-1976 HUD Code (mobile) homes Certification label

  17. Sample Measure Selection Priority List INTRODUCTION TO MOBILE HOMES

  18. Retrofit Options – Duct Systems INTRODUCTION TO MOBILE HOMES Open ended duct Performance-based duct treatments are challenging but very important. They include: • Visual and diagnostic assessment • Sealing and repair • Converting belly return system • Cleaning • Removing obstructions • System balancing • Replacing damaged registers • Post-repair diagnostics Photo courtesy of Tony Gill Repair Challenging but very important! Photo courtesy of Tony Gill

  19. Retrofit Options – Heating Systems INTRODUCTION TO MOBILE HOMES Heating system retrofits include: • Visual and diagnostic testing • Cleaning dirty burners • Cleaning and adjusting blowers • Replacing furnace filters • Repairing excessive temperaturerise problems • Adjusting operating temperatures • Replacing unsafe or inefficient furnaces Should only be attempted by qualified heating technicians Photo courtesy of WV GOEO

  20. Retrofit Options – Belly Insulation INTRODUCTION TO MOBILE HOMES Re-insulating the mobile home belly is almost always cost-effective Benefits: • Increases thermal performance • Air leakage reductions between 25% and 50% are possible • Enhances occupant comfort Very challenging but achievable with the right tools and good training Photo courtesy of PA WTC

  21. Re-insulating sidewalls is also usually a very cost-effective retrofit Benefits: Increases thermal performance Reduces air leakage Reduces noise Retrofit Options – Sidewall Insulation INTRODUCTION TO MOBILE HOMES Photo courtesy of Tony Gill Technically not difficult or time consuming

  22. Retrofit Options – Roof Insulation INTRODUCTION TO MOBILE HOMES • Re-insulating roof cavities on mobile homes is typically cost-effective • Benefits: • Increases thermal performance • Provides cooling savings • Reduces roof rumble Moderately challenging but achievable with the right tools and good training Photo courtesy of the US Department of Energy

  23. Retrofit Options - Other Measures INTRODUCTION TO MOBILE HOMES • Window and door replacement • Hot water conservation measures • Health and safety measures • Standard base load measures • Cooling measures for hot climates, including: • Reflective roof coatings • Shade screens and awnings • Window films • Incidental repairs Photo courtesy of WV GOEO

  24. Sequence of Retrofit Options Perform blower door-guided air sealing Diagnose, repair, seal, and improve duct systems Diagnose, repair, or replace furnace Prepare and insulate the belly cavity Prepare and insulate walls Prepare and insulate roof cavity Inspect and apply domestic water heater improvements and standard base load measures Inspect and repair, or replace windows and doors INTRODUCTION TO MOBILE HOMES

  25. Summary Mobile homes are throughout the U.S. and are here to stay. Mobile home construction details differ depending on the era the home was built. The year the mobile home was built drives the retrofit strategy. Huge opportunities exist for improving the efficiency of these structures through well-thought-out weatherization measures. Weatherization technicians should apply cost-effective retrofit options. INTRODUCTION TO MOBILE HOMES

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