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Measure Guideline: Air Conditioner Diagnostics, Maintenance, and Replacement

Description: This guideline responds to the need for an efficient means of identifying, diagnosing, and repairing faults in air conditioning systems in existing homes that are undergoing energy upgrades. Inadequate airflow due to constricted ducts or undersized filters, improper refrigerant charge, and other system defects can be corrected at a fraction of the cost of equipment replacement and can yield significant savings. The guideline presents a two-step approach to diagnostics and repair.
Date: March 1, 2013
Creator: Springer, D. & Dakin, B.
Partner: UNT Libraries Government Documents Department

Measure Guideline: Ventilation Cooling

Description: The purpose of this measure guideline on ventilation cooling is to provide information on a cost-effective solution for reducing cooling system energy and demand in homes located in hot-dry and cold-dry climates. This guideline provides a prescriptive approach that outlines qualification criteria, selection considerations, and design and installation procedures.
Date: April 1, 2012
Creator: Springer, D.; Dakin, B. & German, A.
Partner: UNT Libraries Government Documents Department

Sonoma House: Monitoring of the First U.S. Passive House Retrofit

Description: The Sonoma Deep Retrofit is a single-story deep retrofit project in the marine climate of Sonoma, California. The design was guided by Passive House principles which promote the use of very high levels of wall, ceiling, and floor insulation along with tight envelope construction to maintain a comfortable indoor environment with little or no need for conventional heating or cooling.
Date: December 1, 2012
Creator: German, A.; Weitzel, B.; Backman, C.; Hoeschele, M. & Dakin, B.
Partner: UNT Libraries Government Documents Department

Measure Guideline: Evaporative Condensers

Description: The purpose of this measure guideline on evaporative condensers is to provide information on a cost-effective solution for energy and demand savings in homes with cooling loads. This is a prescriptive approach that outlines selection criteria, design and installation procedures, and operation and maintenance best practices. This document has been prepared to provide a process for properly designing, installing, and maintaining evaporative condenser systems as well as understanding the benefits, costs, and tradeoffs.
Date: March 1, 2012
Creator: German, A.; Dakin, B. & Hoeschele, M.
Partner: UNT Libraries Government Documents Department

Super Energy Efficiency Design (S.E.E.D.) Home Evaluation

Description: This report describes the results of evaluation by the Alliance for Residential Building Innovation (ARBI) Building America team of the 'Super Energy Efficient Design' (S.E.E.D) home, a 1,935 sq. ft., single-story spec home located in Tucson, AZ. This prototype design was developed with the goal of providing an exceptionally energy efficient yet affordable home and includes numerous aggressive energy features intended to significantly reduce heating and cooling loads such as structural insulated panel (SIP) walls and roof, high performance windows, an ERV, an air-to-water heat pump with mixed-mode radiant and forced air delivery, solar water heating, and rooftop PV. Source energy savings are estimated at 45% over the Building America B10 Benchmark. System commissioning, short term testing, long term monitoring and detailed analysis of results was conducted to identify the performance attributes and cost effectiveness of the whole house measure package.
Date: December 1, 2012
Creator: German, A.; Dakin, B.; Backman, C.; Weitzel, E. & Springer, D.
Partner: UNT Libraries Government Documents Department

Feasibility Study: Ductless Hydronic Distribution Systems with Fan Coil Delivery

Description: The primary objectives of this study are to estimate potential energy savings relative to conventional ducted air distribution, and to identify equipment requirements, costs, and barriers with a focus on ductless hydronic delivery systems that utilize water-to-air terminal units in each zone. Results indicate that annual heating and cooling energy use can be reduced by up to 27% assuming replacement of the conventional 13 SEER heat pump and coil with a similarly rated air-to-water heat pump.
Date: July 1, 2012
Creator: Springer, D.; Dakin, B. & Backman, C.
Partner: UNT Libraries Government Documents Department

West Village Community: Quality Management Processes and Preliminary Heat Pump Water Heater Performance

Description: West Village, a multi-use project underway at the University of California Davis, represents a ground-breaking sustainable community incorporating energy efficiency measures and on-site renewable generation to achieve community-level Zero Net Energy (ZNE) goals. The project when complete will provide housing for students, faculty, and staff with a vision to minimize the community's impact on energy use by reducing building energy use, providing on-site generation, and encouraging alternative forms of transportation. This focus of this research is on the 192 student apartments that were completed in 2011 under Phase I of the West Village multi-year project. The numerous aggressive energy efficiency measures implemented result in estimated source energy savings of 37% over the B10 Benchmark. There are two primary objectives of this research. The first is to evaluate performance and efficiency of the central heat pump water heaters as a strategy to provide efficient electric water heating for net-zero all-electric buildings and where natural gas is not available on site. In addition, effectiveness of the quality assurance and quality control processes implemented to ensure proper system commissioning and to meet program participation requirements is evaluated. Recommendations for improvements that could improve successful implementation for large-scale, high performance communities are identified.
Date: November 1, 2012
Creator: Dakin, B.; Backman, C.; Hoeschele, M. & German, A.
Partner: UNT Libraries Government Documents Department

Air-to-Water Heat Pumps With Radiant Delivery in Low-Load Homes

Description: Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).
Date: December 1, 2013
Creator: Backman, C.; German, A.; Dakin, B. & Springer, D.
Partner: UNT Libraries Government Documents Department