Comfort and HVAC Performance for a New Construction Occupied Test House in Roseville, California

Research output: NRELSubcontract Report


K. Hovnanian(R) Homes(R) constructed a 2,253-ft2 single-story slab-on-grade ranch house for an occupied test house (new construction) in Roseville, California. One year of monitoring and analysis focused on the effectiveness of the space conditioning system at maintaining acceptable temperature and relative humidity levels in several rooms of the home, as well as room-to-room differences and theactual measured energy consumption by the space conditioning system. In this home, the air handler unit (AHU) and ducts were relocated to inside the thermal boundary. The AHU was relocated from the attic to a mechanical closet, and the ductwork was located inside an insulated and air-sealed bulkhead in the attic. To describe the performance and comfort in the home, the research team selectedrepresentative design days and extreme days from the annual data for analysis. To ensure that temperature differences were within reasonable occupant expectations, the team followed Air Conditioning Contractors of America guidance. At the end of the monitoring period, the occupant of the home had no comfort complaints in the home. Any variance between the modeled heating and cooling energy andthe actual amounts used can be attributed to the variance in temperatures at the thermostat versus the modeled inputs.
Original languageAmerican English
Number of pages29
StatePublished - 2013

Bibliographical note

Work performed by IBACOS, Inc., Pittsburgh, Pennsylvania

NREL Publication Number

  • NREL/SR-5500-60058

Other Report Number

  • DOE/GO-102013-4021


  • air distribution systems
  • attic bulkhead
  • Building America
  • comfort
  • ductwork in conditioned space
  • heating, ventilation, and air conditioning (HVAC)
  • hot dry climate
  • new construction
  • occupied test house
  • residential
  • residential buildings
  • slab-on-grade
  • truss modification


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