1:5:10:365 EcoTip Blog

September 5, 2008

:249 Remodeling Air Flow Control

Welcome to today’s 1:5:10:365 Tip for becoming a better steward for our home and planet environment.

1:5:10:2489 EcoTip: Controlling air flow by creating a negative air pressure in the remodeling zone can help prevent dust from traveling to other clean parts of the home – especially when used in combination with a dust curtain in doorways and other openings (:248).

Caution when you create a negative pressure you may cause back drafting of combustion appliances – so read tips :113 and :114 to learn how to safeguard against accidentally causing this very dangerous situation when following this 1:5:10:365 Ecotip.

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 Additional Information:

Suggested Review: :039, :040, :113, :114, :248

A simple way to create a negative pressure in the remodeling area is to seal a box fan into a window so that it will blow outside. Use quick release tape and polyethylene plastic (if necessary) to seal the fan to the window so the air flow must go through the fan and not around it. Allow a cross ventilation to bring fresh air into the work area from the opposite side of the room. This make up air should be enough to allow good ventilation but not so much that the negative pressure is lost. You can check negative air flow and pressure visually by using the techniques discussed in :039 and :040. In this case you want an air flow from the outside of the building into the work area. A puff of test smoke placed at the dust curtain should not travel into the clean parts of the home, but should be pulled into the remodeling area. As noted above in the caution – you don’t want the negative pressure in the construction area to create a back drafting of you hot water heater, fire place, furnace or other combustion appliances.

This is serious stuff. If you don’t understand how to use air flow controls with a dust curtain safely – don’t do it because it could cause a fire or carbon monoxide poisoning if done improperly.

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