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hvac:roof_vent [2020/04/06 13:14] frater_secessus [sizing] |
hvac:roof_vent [2020/04/06 13:48] frater_secessus [wind-powered vents] |
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The industry standard for RV roof vents is 14"x14".((http://www.arizonarvpartscenter.com/standard-14-x-14-rv-vent-lids-s/468.htm)) RV OEM vents are often substandard, lacking cowling around the fan that would move more CFM. | The industry standard for RV roof vents is 14"x14"((http://www.arizonarvpartscenter.com/standard-14-x-14-rv-vent-lids-s/468.htm)) and can be as simple/inexpensive or fancy/expensive as one wants. |
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See also [[hvac:roof_vent#nonstandard_vents|non-standard vents]] below. | See also [[hvac:roof_vent#nonstandard_vents|non-standard vents]] below. |
===== nonstandard vents ===== | ===== nonstandard vents ===== |
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Although 14x14" vents are standard in the camper world, there are other options. | Although 14x14" vents are standard in the camper world, there are other (usually smaller) options. The smaller vents often have greatly-reduced flow, as measured in CFM((cubic feet/minute)). Some of the smaller ones give cubic feet measurements, //but are given for an hour//. Example: 900 cubic ft/hour == only **15** CFM. |
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| 'Dwellers looking to maximize solar real estate may be able to mount low-rise vents //under// raised solar panels. |
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| ==== mushroom vents ==== |
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| RV-style mushroom vents are typically mounted in 5" to 6.25" holes. They may be always-open or openable, [[https://amzn.to/2UPaOF0|powered]] or passive. [[https://amzn.to/2UL5ulK|Solar powered versions]] exist. |
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| ==== wind-powered vents ==== |
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| [[https://amzn.to/39K80wV|{{ https://m.media-amazon.com/images/I/61kgY7E413L._AC_UY218_ML3_.jpg?125}}]][[https://amzn.to/39K80wV|Flettner-style vents]] use breezes (5-10mph+((https://www.flettner.co.uk/flettner-frequently-asked-questions/))) to rotate fan blades. |
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Marine style mushroom vents | |
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