Differences

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--- hvac:roof_vent [2017/06/10 17:36]
frater_secessus [features]
+++ hvac:roof_vent [2019/10/19 14:50]
frater_secessus [sizing]
@@ Line 5: / Line 5: @@
 The industry standard for RV roof vents is 14"x14".((http://www.arizonarvpartscenter.com/standard-14-x-14-rv-vent-lids-s/468.htm))  OEM vents are often substandard, lacking cowling around the fan that would move more CFM.
+===== power consumption =====
+[[https://www.reddit.com/r/vandwellers/comments/83sjqg/for_anyone_wondering_how_much_power_a_maxxair_fan/|{{ https://i.redd.it/ii18f5vmm9l01.jpg?150}}]]Fans will use various levels of power at their different speed settings.  For example, a 10-speed Maxxair consumes between 0.1A at lowest speed to almost 3A at full speed.  See the pic to the right for one user's measurements.
+----
@@ Line 34: / Line 40: @@
   * rain detection and auto-close
   * remote
+===== roof vents in summer =====
+Since hot air rises, you may get best results in summer by using the fan to **blow air out of the camper**.  If you have a [[hvac:ventilation|ventilation]] intake under your vehicle you may be able to pull in relatively cool air.
+===== roof vents in winter =====
+In winter you may want to run the vent on the lowest setting **pulling air into the camper**.  This will preserve your warm air at the roof, contribute to circulation of air, and help control [[hvac:dehumidifier|humidity]].

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