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ESTAPLACE.COM REAL ESTATE - FREE LISTING SERVICE -
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Nesgroup address: alt.building.construction - Date & Time for the message: Fri, 09 Sep 2005 22:08:05 GMT
/ Author of the message: "CWatters" |
Title of the message: |
Re: how to measure air freshness in house?
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Text of the message: |
"Larry" <calbert7@mchsi.com> wrote in message news:ggeUe.318150$x96.131120@attbi_s72... > I am getting ready to install an energy recovery ventilator (ERV) in my > new house. It will condition the temperature and humidity of incoming > fresh air from the outside with the exiting stale air from inside. In > order to determine a good exchange rate (fan speed), I would like some > way to measure fresh air quality. The usual measure is the "number of air changes per hour". Measure the volume of the house. Measure the airflow rate. Divide one by the other. Hint choose the right units of measurement! I believe the recommended figure for continious ventillation is 0.25 - 0.5 changes per hour. Higher figures are only used for fans that don't run all the time (eg a bathoom fan wired to a timer triggered by the light switch should achieve 6 changes per hour but for just the bathroom). More.. |
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Estaplace.com is one the Ceglia Giovanni projects, started on 20 July 2005, and online since 20 August as a real estate platform for listings, mainly operating on the Italian and American/English market in the Internet, Estaplace would like to become the point of referiment for home sellers and home buyers, a site where private owners or real estate agencies can have the possibility to show their offers to the world. Estaplace.com is only one of the Giovanni Ceglia's sites. Everyday Giovanni Ceglia works to improve new Internet tools and services for online marketing and business. Estaplace.com will become the biggest portal for real estate business and investments online.