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Basics & Theory

Home Tips: How Dehumidifiers Work
Home Tips describes, with a picture, how a dehumidifier works.

HVAC School: Impact of Adding or Removing Water From Air
HVAC School says we often add water to the air (humidify) and remove water from the air (dehumidify) as part of our work. they take a different look at what happens when we do that.
Issues & Performance

CMHC: Effectiveness of Dehumidifiers In Controlling Moisture In Houses
CMHC study determined a practical and cost-effective method of assessing effectiveness of dehumidifiers in controlling moisture in houses, and assessd usefulness of dehumidifiers in controlling general moisture conditions in houses in different regions of Canada. Results showed that in most regions of Canada, dehumidification is beneficial during the non-heating season, while year-round operation can be beneficial for houses located in milder coastal climates. (PDF)

Home Energy: Dehumidifier Metering Study
Home Energy Magazine summarizes a Wisconsin metering study to figure out just how much energy typical Wisconsin households use to dehumidify their homes.

NRCan: Energy Efficient Dehumidifiers
NRCan provides information and resources on energy efficient dehumidifiers.

NREL: Test Report for Six Energy Star Dehumidifiers
US National Renewable Energy Laboratory report Laboratory Test Report for Six Energy Star Dehumidifiers documents the measured performance of six residential Energy Star vapor compression dehumidifiers. (PDF)

US DOE: Performance Of Residential Dehumidifiers Under Cyclic Operation
US Department of Energy report Measured Performance of Residential Dehumidifiers Under Cyclic Operation summarizes tests on the part load performance of four residential dehumidifiers. (PDF)

Building Performance Podcast: Mastering Dehumidification
Building Performance Podcast on mastering dehumidification discusses macro-drying philosophy, down to the nitty gritty of ERVs and hairdryers and wet spots on your carpet.

Building Science: Residential Dehumidification Systems For Hot-Humid Climates
Building Science report Residential Dehumidification Systems For Hot-Humid Climates summarizes research on twenty homes that were tested and monitored in the hot-humid climate of Houston, Texas, to evaluate the humidity control performance and operating cost of six different integrated dehumidification and ventilation systems that could be applied by production homebuilders. The system providing the best overall value, including humidity control, first cost, and operating cost, involved a standard dehumidifier located in a hall closet with a louvered door and central-fan-integrated supply ventilation with fan cycling.

Building Science: Supplemental Dehumidification For Humid Climates
Building Science online slide show presentations describes considerations for supplemental dehumidification for humid climates. (PDF)

Building Science: Supplemental Dehumidification In Warm-Humid Climates
Building Science report Supplemental Dehumidification In Warm-Humid Climates covers a description of the need and applied solutions for supplemental dehumidification in warm-humid climates, especially for energy efficient homes where the sensible cooling load has been dramatically reduced. (PDF)

Energy Vanguard: Perfect Weather for a Dehumidifier
Energy Vanguard discusses what types of weather warrant use of a dehumidifier.

GBA: Deep Dive Into Dehumidification
Green Building Advisor online video provides a deep dive into dehumidification. Humidity control in homes is not just a building durability issue, it’s also a significant health issue, and not just because of mold. And mechanical dehumidification is no longer just an issue for hot/humid climate zones.

GBA: Dehumidifiers & Energy Costs
Green Building Advisor describes why lowering your indoor relative humidity is usually a good idea, with the only downside being energy cost.

GBA: Pros & Cons Of Running A Dehumidifier
Green Building Advisor discusses pros and cons of running a dehumidifier, and whether or not a dehumidifier might overheat your superinsulated house in the summertime.

HIRL: Dehumidification in Humid & Hot-Humid Climates
Home Innovation Research Labs online tech note Humidity Control: Supplemental Dehumidification in Hot-Humid Climates, provides an overview of strategies for improving humidity control in hot-humid climates (applicable as well in other humid climates). (PDF)

HVAC School: Dehumidifier Facts & Troubleshooting
HVAC School provides some dehumidifier facts and considerations for troubleshooting them.

HVAC School: How to Reduce Indoor Humidity
HVAC School describes why and how humidity inside a home should be maintained between 30% and 60% relative humidity.

JLC: Can Dehumidifier Be Added To Forced Air
Journal of Light Construction Q & A says it is possible to add a dehumidifier to a forced-air system, but there is really no good reason to do so.
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