Installed correctly, comprehensive vented attic upgrades can significantly reduce utility costs while improving comfort, indoor air quality, and durability of the attic structure.
Installed correctly, comprehensive vented-to-unvented attic upgrades can significantly reduce utility costs while improving comfort, indoor air quality, and durability of the attic structure.
Guide describing how to install flashing that is integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit.
In addition to the savings that come with being an efficient heat pump, ductless heat pumps save energy and money by avoiding the use of ducts or using much more compact duct layouts inside the conditioned space. That’s because ducts are often sources of heat loss where not properly insulated and...
A home energy rater will conduct an in-depth energy performance assessment of a home using diagnostic testing equipment, such as a blower door test, a duct leakage tester, a combustion analyzer, and infrared camera to determine the amount and location of air leaks in the building envelope, the...
The intent of this brief is to provide code-related information about ductless mini-split heat pumps to help ensure that the measure will be accepted as being in compliance with the code.
Presentation describing the Georgia State Minimum Standard Energy Code air barrier requirements, envelope concepts including air flow and thermal properties, and common missed insulation and air-sealing opportunities.
This brief discusses the provisions in the 2015 International Energy Conservation Code (IECC) and International Residential Code (IRC) related to evaporative cooling.
Case study describing a builder in Georgia that designs energy-efficient homes for a green community, yielding homes with HERS scores as lowas 59 and electric bills as low as $50 a month.
The focus of this brief is on boiler efficiency, sizing requirements, controls, combustion air, and pipe insulation for the 2015 version of the IRC/IECC.
Case study describing a new construction building project of 20 homes that earned HERS scores that represent greater than 50% energy savings in heating and cooling over the 2004 IECC.
The intent of this brief is to provide code-related information about gas-fired boilers to help ensure that the measure will be accepted as being in compliance with the code. Providing notes for code officials on how to plan reviews and conduct field inspections can help builders or remodelers...
Poorly air-sealed homes are less comfortable and cost more to maintain because they provide a pathway for drafts, cold spots, moisture, and insects into the home. Comprehensive draft protection includes a continuous air barrier around the whole house along with caulking and sealing in all holes and...
Many homes are missing whole-house fresh air systems that ensure adequate dilution of moisture, dust, pollen, and particulates inside the home. These contaminants can trigger asthma and allergy attacks as well as other health problems. Balanced heat recovery ventilation (HRV) and enthalpy recovery ventilation (ERV) provide an equal amount of supply and exhaust air adequate for effective dilution of contaminants. HRV’s include a heat exchanger to capture heat from exhaust air in the winter and supply air in summer for added efficiency. ERV’s also help remove unwanted outdoor moisture in summer and retain desired indoor moisture in winter for added comfort. However, critical installation best practices need to be followed to ensure a successful project. Use this checklist to get the significant health and enhanced comfort benefits possible from a quality installed balanced HRV/ERV fresh air system.
Guide describing the types of whole-house fans, installation details to reduce energy loss, and how to operate them for comfort and energy savings based on climate zone.
Information guide describing things to consider in the attic, ceiling, or roof before attempting retrofits of items including HVAC, wiring, or structural systems.
Case study about Artistic Homes of Albuquerque, New Mexico, the first home builder in the United States to offer true net zero energy construction to the average home buyer on every home it builds.
Case study poster describing a DOE Zero Energy Ready Home 2020 Housing Innovation Award winning affordable home in the hot-humid climate that used 5.5-inch, R-20 open-cell spray foam wall insulation, and a 17.5 SEER ducted mini-split heat pump to achieve a HERS score of 44 without PV.
Webinar answering code-related questions on duct leakage tests, moisture levels in attics and crawlspaces, combustion equipment in conditioned attics, ventilation in multifamily buildings, and continuous insulation in residential construction.
Information guide describing how to apply a whole-house approach to home improvement with energy efficiency upgrades, improved indoor air quality, and increased comfort.
Many homes are missing whole-house fresh air systems that ensure adequate dilution of moisture, dust, pollen, and particulates inside the home. These contaminants can trigger asthma and allergy attacks as well as other health problems. Supply integrated with HVAC fresh air systems draw in adequate outdoor air for effective dilution of contaminants through a duct tied into the HVAC system return duct ahead of the filter. However, critical installation best practices need to be followed to ensure a successful project. Use this checklist to get the significant health benefits possible from a quality installed supply integrated with HVAC fresh air system.
Case study poster describing a DOE Zero Energy Ready Home 2020 Housing Innovation Award winning affordable home in the mixed-humid climate that used 2x6, 24-inch on-center R-33 wall insulation, triple-pane windows and both ductless and ducted mini-split heat pumps to achieve a HERS score of -2 with...
In many homes, bathrooms exhaust fans are missing or very ineffective removing moisture from washing and bathing which can increase the risk of mold and mildew. High-efficiency exhaust fans quietly exhaust bathroom air to the outside, and can operate continuously as a whole-house fresh air system to help dilute moisture, dust, pollen, and particulates inside the home. However, critical installation best practices need to be followed to ensure a successful project. Use this checklist to get the significant health and durability benefits possible from a quality installed bathroom exhaust fan.
Many homes are missing whole-house fresh air systems that ensure adequate dilution of moisture, dust, pollen, and particulates inside the home. These contaminants can trigger asthma and allergy attacks as well as other health problems. Balanced supply plus exhaust fresh air systems provide an equal amount of supply and exhaust air adequate for effective dilution of contaminants. However, critical installation best practices need to be followed to ensure a successful project. Use this checklist to get the significant health benefits possible from a quality installed balanced supply plus exhaust fresh air system.
Information guide describing things to consider in the basement or crawlspace before attempting retrofits of adjacent items including HVAC, wiring, or structural systems.
Gas water heaters in many homes have low efficiency and use natural draft exhaust with the potential to back draft or spill combustion gases. High-efficiency gas tank water heaters reduce heat losses with highly insulated tanks, use efficient burners, and have ducted supply and exhaust air that cannot backdraft combustion gases. However, critical installation best practices need to be followed to ensure a successful project. Use this checklist to get the significant energy savings and safety benefits possible from a quality installed gas tank water heater.
Guide providing information on how cool roofing and wall cladding surfaces work, which climates can most benefit from them, and how to find and select cool roofing and wall cladding products.
The intent of this brief is to provide code-related information about controlling moisture in unvented attics by installing a vapor diffusion port/vent that would convey water vapor from an unvented attic to the outside when air-permeable insulation materials are installed and can be verified as being in compliance with the related codes and standards for residential construction. Providing consistent information to document compliance with codes and standards to all relevant parties responsible for verifying compliance (e.g., code officials, builders, contractors, designers, etc.) is expected to result in increased compliance and more timely, less challenging and more uniform plan review and field inspections.
The intent of this brief is to provide code-related information about heat recovery ventilation to help ensure that what is proposed regarding the heat recovery ventilator ‘product’ itself as well as ventilation measures can be verified as being in compliance with the code. Providing consistent information to document compliance with codes and standards to all relevant parties responsible for verifying with those codes and standards (e.g., code officials, builders, contractors, designers, etc.) is expected to result in increased compliance and more timely, less challenging and more uniform plan review and field inspections.
Guide describing the planning and installation process for Heat Pump Water Heaters (HPWHs) in single-family homes, including model selection, installation location, thermal resource adequacy, and condensate removal.
Guide describing the use of attic ventilation fans to mechanically pull outside air through the attic in an attempt to cool the attic, control moisture, and prevent ice dams.