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1349 Three Approaches to Ventilation - Insulation Energy Efficiency - Venting Spaces
 
1349 Three Approaches to Ventilation - Insulation Energy Efficiency - Venting Spaces -

Image Text: 1: exhaust only > example: clothes dryers, central vacuum, kitchen and bath exhaust fans > drafts > fan > PRO: cold, dry infiltrating air has drying effect on structure > CON: uncomfortable, drafty > can cause back drafting of combustion appliances > no heat recovery > uses electricity > 2: supply only > air leakage > example: central supply system > fan > PRO: more fresh air is brought into the house > CON: uncomfortable, drafty > forces warm, humid house air into building structure > no heat recovery > uses electricity > 3: balanced > example: HRV (Heat Recovery Ventilator) > fan > fan > PRO: no pressurization or depressurization problems (better comfort) > CON: may not have heat recovery > uses electricity

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INSULATION

The Basics, Air/Vapor Barriers (Vapor Retarders), Venting Roofs, Venting Living Spaces, Attics, Flat and Cathedral Roofs, Walls Above Grade, Basements and Crawlspaces, Floors over Unheated Areas, Ventilation Systems

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