ACI Home Performance Conference 2007

ThPM 06 - House Depressurization & Resilient Combustion Venting: Challenges & Solutions (Advanced)

Thursday, April 26, 2007 · 1:30 PM - 5:00 PM

Ignoring the issue all together, or power venting are often the default strategies when activities to increase building tightness run up against house depressurization limits. Examine a triage approach to weigh strategies for ensuring the natural draft combustion equipment will operate safely versus power venting options. Interactions can be difficult to predict. The house depressurization limit trumps building tightness guidelines. Prior understanding of combustion safety testing, blower door air sealing, and duct diagnostics / repair and cost-effectiveness is recommended.

By attending this session, attendees will

Learn how to use the “Tooley” chart to assess spillage likelihood now and after proposed work, as well as estimate likely depressurization from fan flow when it is too windy to measure
Learn how HVAC imbalance and leakage can multiply exhaust fan effect with door closure and how to predict reduced depressurization resulting from pressure balancing
See what to do with robust solutions including NFPA 54 venting, isolation with sealing and combustion air to mechanical closet, upgrading large intermittent fans with small continuous duty fans, duct sealing and shell sealing in supply dominant areas, power venting, and more

Keyword(s): air sealing, auditing, blower door, combustion safety, cost effectiveness, design, Duct Blaster^®, duct sealing, durability, health & safety, interactions, mechanical ventilation, pressure balancing
Type: Half-Day
CEU: National Association of the Remodeling Industry (NARI)

Course Presenter(s):

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