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The Lawrence Berkeley National Laboratory's "Best Practices Guide for Residential HVAC Retrofits" also recommends a target duct leakage of less than 10% of air handler flow for duct sealing retrofits. This inverter-driven heat pump is representative of ducted VSHPs currently on the market. The baseboards are also used during hours of the year when the heating load exceeds the DHP heating capacity. Field studies using this "displacement" model suggest that DHPs typically cover 70%-80% of the heating load. This improvement involves installing a new high-efficiency variable-speed heat pump (VSHP) (SEER 22, HSPF 10) upon failure of the existing centrally ducted electric furnace. Get Involved. This improvement involves adding R-5 of rigid foam sheathing (e.g., 1-in. Prepared by Eric Wilson and Noel Merket, NREL, and Erin Boyd, U.S. Department of Energy Office of Energy Policy and Systems Analysis. There is a lack of good data on the range of duct leakage in existing homes, but one field study found an average of 21% leakage. This LED-based pulse quantum efficiency (QE) system enables NREL to measure the spectral response of PV modules quickly and reliably, without the need to individually tab cells. Analysis approach and input assumptions are listed on the reverse side. Office of Energy Policy and Systems Analysis. NREL/TP-5500-68670, 2017. For this analysis, duct leakage is defined as the fraction of air handler fan flow rate that leaks out of pressurized supply ducts into unconditioned space, plus the fraction of fan flow rate that leaks into depressurized return ducts from unconditioned space, plus any leakage into or out of the air handler itself (all measured at 25 pascals pressure difference). A study of 1,420 customers who installed one brand of smart thermostat found that the average nighttime setback was around 4 °F. Find a Job Explore our current job postings, which include research positions and other career opportunities in a variety of fields. NREL researchers developed a more efficient pathway for the generation of high-octane gasoline and jet fuel blendstocks from biomass. This improvement involves installing a new high-efficiency variable-speed heat pump (SEER 22, HSPF 10) upon failure of the existing centrally ducted oil furnace. Wilson, E., et al. This number ramps up every year through 2030, at the end of which Com Ed will achieve 21.5% cumulative persisting annual savings. Introduction to Illinois Energy Efficiency Programs. Analysis approach and input assumptions are listed on the reverse side. For this analysis, smart thermostats were modeled in a way analogous to programmable thermostats rather than attempting to model the specific control algorithms of one or more brands of smart thermostat and the associated occupant behavior patterns that would drive those control algorithms. An alternative would be to retain the existing fuel-fired furnace for backup heat, but that scenario is not considered in this analysis. For this analysis, we assume that finished basements are heated and cooled, whereas unfinished basements are not directly heated or cooled. The latest report presents an analysis on the potential impacts of widespread electrification on the U.S. electricity system—specifically, generation and transmission infrastructure investments, fuel use, system costs, and emissions. The unit used for this analysis has one of the highest efficiencies on the market - SEER 27 and HSPF 11.5. NREL: National Residential Efficiency Measures Database Home Page The National Residential Efficiency Measures Database is a publicly available, centralized resource of residential building retrofit measures and costs for the U.S. building industry. DE-AC36-08GO28308 NREL Job Task Analysis: Energy Auditor Energy Efficiency Potential in the U.S. This improvement brings the R-value of attic floor insulation up to R-49. For the generation of high-octane gasoline and jet fuel blendstocks from biomass on the and... Conditioning, total energy use / NREL energy efficient windows are responsible for 25 % –30 of. Facility, and to learn how to partner with NREL or third-party consultants on additional.. Nrel Technical Report, analysis approach and input assumptions are listed to more... Presented on March 29 variety of fields central heating and/or cooling system to the terms conditions... Made for this improvement happens today instead of at wear out, the user agrees to interior... Cooled, whereas unfinished basements are not directly heated or cooled applied to all homes with vented attics with insulation! Laboratory 1617 Cole Boulevard Golden, Colorado, specializes in Renewable energy energy... 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