VIP Call Girl Jamshedpur Aashi 8250192130 Independent Escort Service Jamshedpur
2011 09-14 eeba - nahbrc building america high performance retrofits
1. BA High Performance
Retrofits
Amber Wood
Manager, Energy Programs
EEBA Conference 2011
September 14, 2011
Driving Innovation in Housing Technology
2. Building America
Private/public R&D
partnership sponsored by
DOE
Energy-efficient solutions
for new and existing
housing
Technologies/Systems
Whole-House Test Homes
Quality Processes
3. Greenbelt Homes, Inc.
Privately-owned
co-op
1,600 units
4 units/building
1930’s-40’s
Roosevelt work-
force housing
4. 1970’s Energy Upgrade
Insulation Install 52 gal
Attic electric water
Crawlspaces heaters
Exterior walls Upgrade electrical
Replace steel
frame windows
Remove oil-fired
boilers
Install electric
baseboard
4
5. GHI Pilot Program
Community Goals:
Upgrade in 2015 Health & safety
Comfort
7 buildings, 28 Increased IEQ
units Durability
3 block
2 frame Affordability
2 brick
6. Why?
Motivations for pilot program:
Lower utility bills
Comfort
Lower life-cycle costs
Maintenance & replacement
Photo by Doriann Asch courtesy of www.greenbelthomes.net
7. Pilot Program
Baseline Monitoring (2010-2011)
Pre-Retrofit baseline
Install Monitoring Equipment
Air infiltration
Temperature/Humidity/Energy Use
Humidity
Building Envelope Upgrades (2011-2012)
Retrofit building envelopes
Monitor envelope upgrade
HVAC Upgrades (2012-2013)
Retrofit HVAC
Monitor upgrade package
8. Pilot House Assessment
Walk-Through Evaluation
Visual Inspection
Homeowner Operation
Utility Bills
Short-term Testing
8
Photo by Celestine Ranney-Howes courtesy of www.greenbelthomes.net
9. Walk-Through Evaluation
Dimensions
Insulation
Walls, ceilings, and foundations,
Baseboard heaters
Locations , calculating capacity
Hot water system
Appliances
9
11. Baseline Short-term
Testing
Blower door test
Multi-point house depressurization
Simultaneous blower doors in
adjacent units
Significant air leakage
Attic access panels
Air conditioners
Penetrations
11
13. Simulation Parameters
13 of the 28 homes Frame w/Brick
Painted block End & inside units
End & inside units Frame w/Vinyl
Block w/ Vinyl End & inside units
End & inside units End, front addition
End & inside units w/ End, side addition w/ large
basement glass area
End, full rear addition
Inside, full rear addition
13
Artwork by Isabelle Gournay courtesy of www.greenbelthomes.net
14. Beopt Energy Simulation
Optimizations
All electric
Source savings = electricity savings
Annualized cost of the upgrades + utility costs
30 years at 7%
Block unit example:
14
15. Energy Simulation
Optimization
Block unit example
Costs & savings comparison
15
16. Installation Costs for Building
Envelope Improvements
Evaluated on a per-building
basis
Do not include remediation
associated with environmental
hazards (such as lead paint,
radon, or asbestos)
Costs are exclusive of
management fees
16
24. Energy & Performance
Monitoring
Indoor air temperature and relative
humidity in multiple locations;
Crawlspace and outdoor temperature and
relative humidity;
Heating energy use (where feasible);
Hot water energy use;
Dryer energy use (if applicable); and
Total electric energy use.
24
Photo courtesy of www.greenbelthomes.net
28. Retrofit Solutions for
Enhancing Energy Efficiency
Energy Savings: Household to National
Comfort: Temperature swings to
consistency
Moisture: Reduce potential problems
Indoor Air: Controlled ventilation
Technology: Options and performance
Installation: Contractor training/QA
Cost: Installation/operation/savings
Value: Demonstrate values at sale
30. Thank You!
Amber Wood
NAHB Research Center
Manager, Energy Programs
400 Prince George’s Blvd Upper Marlboro, MD 20774
(direct) 301.430.6309 (fax) 301.430.6180
www.nahbrc.com
Driving Innovation in Housing Technology
Notas del editor
Oil fired boilers replaced for safety reasons – changed to baseboard heatingIndividually controlled baseboard electric heaters were installed in each room, except in kitchens and bathrooms where ceiling fan-coil heaters with wall-thermostats were installed; Upgraded electrical and installed individual meters for each unitFifty-two (52) gallon electric water heaters were installed for use in every home;Insulation was added in attics, crawl spaces and exterior walls of vinyl-sided frame homes; in attics and crawl spaces of brick homes and in crawl spaces of block homes.Original steel-frame casement windows were replaced with vinyl or aluminum double-glazed window units.
BackgroundGoals: Health & safety Comfort Increased IEQ Durability Affordability Lower utility bills Maintenance
Collaboration of GHI, NAHBRC, & NREL
Recording house and window dimensions (including additions),Determining insulation levels in the walls, ceilings, and foundations,Documenting equipment and appliance models,Noting locations of baseboard heaters,Calculating capacity of heating and cooling equipmentDetermining the hot water system configuration
The Research Center performed short-term testing in conjunction with the walk-through evaluations. This testing included performing a blower door test for each unit (hot water temperatures and fixture flow rates were also measured). Multi-point house depressurization measurements provided total air leakage (which would include leakage to adjacent units) and leakage to the outdoors. Leakage to outdoors was determined by simultaneously running blower doors in adjacent units. Significant air leakage was consistently noticed at the attic access panels, around through-wall and through-window air conditioners, doors, mail slots, and windows, particularly the windows that were unlatched due to malfunction. Frame houses all had significant leakage through the floor at electrical and plumbing penetrations, particularly at the water heater closet. A duct blaster test was performed on the one unit with a ducted system. The air flow of the bath exhaust fans was measured using a flow hood. The actual air leakage measurements were used in simulation models for specific units.
Plus visual inspection & utility bills
Energy Simulation Optimization
Energy Simulation Optimization
Features that are not directly responsible for increased energy efficiency were added to the estimated cost analysis to enhance building durability and/or indoor air quality. These are: Mechanical ventilation and controls to provide point source and whole house air exchange; andRemediate crawlspaces to improve insulation performance and indoor air quality through minimizing moisture entrance to the home through the crawlspace
While it is admittedly tidy and perhaps overly-simplistic, the majority of the building envelope improvements recommended have been assigned useful life spans of 30 years. The life span coincides with the estimated life of the assumed mortgage (if used to purchase the upgrades). GHI reserve estimates have placed various life spans from 35 to 40 years (vinyl siding on smaller frame homes and windows) to 85 years (exterior doors) on these building elements. Because they are each integral components of the building system, replacement should be planned to occur at the same time to protect the integrity of the buildings. For internal reporting and reserve calculations, the useful lives can be adapted to reflect the experience of GHI and warranty periods offered by the manufacturers whose products are selected for the pilot study.
Exterior Wall Insulation2” thickness (extruded polystyrene, XPS, or polyisocyanurate) or 3” expanded polystyrene or polyisocyanurate materialThe masonry block and masonry brick frame crawlspace foundations extend continuously around the buildings encompassing the front and rear porch slabs, as well as the conditioned spaces. Where these do not have an addition (conditioned space) above, two inches of closed cell SPF, R-12, should be applied to the bottom of the slab, accessible from the crawlspace. Unconditioned porch slabs average roughly 400 square feet per building.
Attic insulation currently is about R-16
For this building type, it is recommended that the existing siding be removed and a weather resistant barrier (WRB) is installed over the wood sheathing and sealed. One inch thickness of rigid foam, R-5 to R-7, installed beneath the horizontal vinyl siding that is scheduled for replacement between 2015 and 2023, is also recommended to compensate for the blown-in cavity insulation which may have settled in the wall. The WRB or the foam should be installed and taped to provide an air barrier over the exterior sheathing which consists of 1”x6”/1”x8” boards.