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Knowledgebase : General Ventilation Questions
Please submit a ticket HERE [http://www.bvc.com/kayako/index.php?/Tickets/Submit] to get help identifying the missing parts for correct shipping. Please include in the ticket a copy of your sales receipt and shipping information (Name, number, street ad...
Wattage is amperage multiplied by voltage. Take the listed amperage from the motor info and multiply by 120 volts to find wattage. keywords - watt, wattage, watts
CFM stands for Cubic feet per minute and is the measurement of a fans performance.
Roof pitch refers to the angle that your roof is sloped. For instance, a 5/12 pitch would mean that for every 12 inches of length towards the peak, the roof rises 5 inches in height.
* Ventilation promotes a cooler attic in the summer and a drier attic in the winter. * By exhausting heated air from the attic, a good ventilation system will help keep the living area cooler with less energy usage. * In cold months, ventilation pr...
Depending on your local building code, you may need to either provide 1 square foot of ventilation per 150 sq. feet of attic space or 1 sq. ft. per 300 sq. feet. Once you determine the square footage of your attic, divide by either 150 or 300 to get...
Over ventilation is possible if you exceed the 50/50 rule of having half intake and half exhaust. There are minimum amounts of ventilation required by city codes. Usually this is either 1/150 or 1/300 or 1 sq. ft. of ventilation per 150/300 of attic sq. f...
Excess exhaust ventilation is preferable too insufficient intake ventilation. If a powered ventilator does not have enough intake ventilation, damage may occur to the motor. If a powered ventilator has too much exhaust ventilation, nothing damaging will o...
The difference between vents is the location. As hot air rises, the vents the air flows out of are exhaust. So by extension, the vents on the top of the roof are exhaust and the vents on the bottom where air flows in to the attic are intake.
We do not recommend using ridge vent with a Power Attic Vent. The PAV will pull air from the ridge vent and will not move as much air from the rest of the attic. The prefered setup is to have the PAV pull air from the soffit vents and exhaust air throu...
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There is not best product. There are units that are better suited to the application. Some customers might prefer using a solar system instead of electric power vents. For electrically powered vents, the CX3000 comes with a life time warranty but if money...
Net Free Air (NFA) is a standard of measurement for the unobstructed area of a ventilator through which air may flow. A 1 ft. by 1 ft. hole is is 1 sq. ft. of NFA while a 1 ft. by 1 ft. hole with a screen has the 1 sq. ft. reduced by the amount of screen ...
Ventilation is a method of regulating the air in a particular area. For attics, generally the result expected is a reduction in temperature. A properly ventilated attic allows outside cooler air to enter an attic and push the hot air up and out. Another...
Attic temperatures should be within 15 degrees of outside air. A smaller temperature difference is preferable. Temperature differences in the attic cause more work for Air Conditioning systems and can also cause extra humidity in the attic.
It comes from normal household activities, such as showers, laundering and cooking activities that can release as much as three to five gallons of water vapor a day. If this water vapor becomes trapped in the attic, it can cause roof decking and shingles ...
Just as houses have to breathe to create a healthy environment for the people living in them, attics also need to "breathe" in order to keep the roofing components "healthy," well-functioning, and structurally sound.