energy efficiency in rehab late 1980s – rip early 1990s – energy standards developed approx 20...
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HELPHPWESPILOT
Energy Efficiency in Rehab
Late 1980s – RIP Early 1990s – energy standards developed
Approx 20 pages Prescriptive Lowering energy usage Controlling moisture
Late 1990s – HELP Duke Energy awards $$ to NCHFA (Special Needs
Energy Products Program) Duke Energy/NCHFA agreement (1997)
Goal of HELP
To encourage the inclusion of high-performance energy-efficiency standards in the rehabilitation of scattered-site single-family housing owned and occupied by low-income customers of Duke Energy Carolinas.
And to make homes
• more affordable - via lower monthly energy bills;
• more comfortable;• more healthy and safe.
It also:• HELPs Duke reduce need to continually
produce more electricity and better control peak demand;
• AND society benefits by reduced carbon/greenhouse gases.
Energy Efficiency in Rehab
Late 1990s - 2005 - 2011, HELP funds used with SFR to pay for energy-efficiency measures in comp rehab
2005 HPwES symposium held at ACI in Austin Texas
HPwES
Home Performance with ENERGY STAR, a national program from the U.S. EPA and U.S. DOE, offers a comprehensive, whole-house approach to improving energy efficiency and comfort of existing homes, while helping to protect the environment.
HPwES & Affordable Housing
2006, some HPwES principals Air-sealing, ES appliances) introduced in SFR Energy-Efficiency Standards
2006 – 2009, HPwES model in the affordable housing market conceptualized at NCHFA
2009 – 2010, NCHFA & AE massage and refine pilot program structure
HPwES & Affordable Housing
2010 - AE & NCHFA work toward developing model HPwES Standards
Early 2011 – HPwES Program standards formulated and adopted for HPwES Pilot Program
Definitions
Sponsor (Advanced Energy)
NCHFA Partner (Pool Member)
(Executes Tri-Party Agreement, NCHFA & AE)
HPwES Contractor (requires BPI certification)
Executes a participation agreement with the Sponsor
Whole House Performance Assessment (HPwES audit)
Performed by HPwES Contractor
Definitions
Rehab Specialist Responsible for WWU & const mgt
Contractor
Responsible for completing EEMs
May or may not be HPwES Contractor
Verification Inspection
Performed by HPwES Contractor
HPwES Summary Certificate
Issued by AE
The HPwES Processs
AE trains Member staff (Rehab Specialist) HPwES Contractor performs HPwES audit
Audit results and HC data to AE HC data reviewed for complexity
AE approves unit, Member reserves funds Rehab Sp generates WWU & CE Contractor installs EEMs HPwES Contractor does post assessment QA by AE – 1st 3, then 10% Approval & HPwES certification
Benefits
HPwES provides Members with structured training and a consistently applied energy-efficiency process.
It provides Members with a HPwES manual containing illustrated technical materials which can be used for “job-site” training of contractors and workers.
HOUSE CHARACTERIZATION
Tech sheet – critical details
Tech sheet – critical details
Tech sheet – critical details
Benefits
HPwES quality assurance process gives Members and NCHFA confidence that the work was appropriate and performed correctly.
HPwES Standards
Air Tightness Ventilation Insulation & Windows HVAC Sizing & Installation Combustion Safety Crawlspaces
Air Tightness
There shall be a continuous, durable air barrier enclosing the conditioned space. This includes features such as chases, knee walls, soffits, garage interfaces, intersecting walls and dropped ceilings.
Air Tightness
Air sealing shall be required for the following building planes:
Attic plane – The highest priority for air sealing shall be given first to any plane adjacent to attic space.
Air Tightness
Exterior walls—Windows, doors, and any visible hole or crack leading from the building to the exterior
Crawlspace/Basement—All plumbing penetrations (e.g., “P” trap) between the conditioned and unconditioned space shall be sealed.
Air tightness
Air tightness
Air tightness
Ventilation
There shall be a filtered whole-house mechanical fresh air ventilation system in compliance with ASHRAE 62.2., 2007.
Ventilation
All bathrooms shall have a fan vented to the outside
All ventilation ducts shall terminate at or beyond the exterior skin of the building.
Insulation, Windows and Doors
Insulation shall be installed to manufacturer specifications without gaps, voids, compression or wind intrusion.
Insulation, Windows and Doors
Insulation and the air barrier in physical contact with each other.
Accessible attics shall be insulated to R-38 or greater.
Replacement windows, if installed, shall be ENERGY STAR labeled.
Knee walls shall be insulated and backed with support material
HVAC Sizing and Installation
Heat pumps shall have an outdoor thermostat installed to prevent supplementary heater operation when the heat pump is capable of meeting the load.
All accessible duct connections shall be sealed with a UL-listed bucket mastic product.
HVAC Sizing and Installation
Duct leakage shall meet the Advanced Energy approved Duct Location Table targets.
New mechanical systems (HVAC) shall be properly sized to ACCA Manual J
Replacement furnaces, if installed, shall be 90 percent efficient or greater.
Combustion Safety
If existing gas equipment will remain atmospherically vented safety testing protocol must be completed and needed repairs must be performed immediately
Combustion safety
Combustion Safety
Homes containing vent-free gas logs or space heaters shall not be retrofitted until units are removed or disabled.
Combustion Safety
One carbon monoxide (CO) detector shall be installed outside of each bedroom area and to manufacturer specifications in homes that have a combustion appliance or an attached garage (minimum 1 per floor).
Crawlspaces
All crawlspaces shall have a 100 percent ground cover of 6 mil thickness or greater.
Houses having crawlspaces with standing water shall not be included in the program unless drainage is a part of the retrofit plan.
HPwES subsidy
1. $7,500 ( including hard & soft costs) if work includes energy-efficiency measures necessary to meet HPwES energy standards; or
2. $10,000 ( including hard & soft costs) if work includes installation of a heat pump.
HPwES and Affordable Housing
HPwES Pilot Program - 7 HELP Members
Currently an option under NCHFA’s Home Energy Loan Program (HELP) when Energy-Efficiency measures applied in the comprehensive rehabilitation of single-family homes
HPwES and Affordable Housing
2012 - incorporate HPwES standards into NCHFA’s HOME-funded Single-Family Rehabilitation