Did you ever feel too hot, too cold, or just stuffy in a room or office? All to often duct sizing and configuration is left to chance or just not addressed at all to get a job knocked out, or to save money.
When you get the lowest bid for a HVAC installation, what are you sacrificing?
It has been my experience a good air flow rule is 1 cfm per square foot. That is "cubic foot per minute" of air flow per square foot of living area floor space in a room. This translates over to the duct size of what it is rated to carry in a nominal situation. Of course this is not necessarily applicable to commercial applications.
This by no means takes the place of load calculations....this should be the minimum. For instance ever see a 14x14 bedroom with 2 outside walls with a 6" round duct feeding it?? It is too small. A 12x12 bedroom would be just "skating by". These issues affect comfort, as well as health and indoor air quality.
Contact me by email with your comfort issues, I'll provide a free consultation.
rick@rlenvirocare.com
Next time we'll cover register placement.
Friday, May 10, 2013
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