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--- hvac:ventilation [2020/07/20 14:02]
frater_secessus [why vans need ventilation]
+++ hvac:ventilation [2020/10/11 19:48]
@@ Line 1: / Line 1: @@
-====== Ventilation ======
-Ventilation is an essential part of any van build.
-===== why vans need ventilation =====
-==== temperature control ====
-It is often hotter inside the van than outside.  Heat comes from several sources:
- * greenhouse effect from light entering windows
- * reradiated heat from the body panels
- * mammal body heat
- * cooking
-When it is hotter inside than outside the vehicle can be cooled by pulling outside air through the van.  The fan cannot lower the van's internal temps lower than the outside temp.
-==== humidity control ====
-Humidity is a serious concern for people living in sealed metal boxes.   It can cause mold, mildew, and discomfort.
-Humidity can come from:
- * mammal perspiration (seen)
- * mammal skin evaporation (not seen)
- * mammal respiration (breathing), up to 20ml/hour at rest.((https://pubmed.ncbi.nlm.nih.gov/22714078/))
- * cooking
- * cleaning
- * spills
- * incompletely sealed water storage
-Up to 28% of the fluids you take in will be released into the air through skin or lungs.((https://qph.fs.quoracdn.net/main-qimg-8a5cca20750ccd6f848cd744459f97bb))
-Ventilating with lower-humidity air from outside can [[hvac:dehumidifier|help control humidity]].
-==== smoke/vapor control ====
-Cooking, smoking, or vaping inside releases particles that can be reduced by ventilating.
-==== smells ====
-Unpleasant smells can be reduced by ventilating
-===== effective ventilation =====
-Ventilation requires **air entering** and **exiting** the vehicle.  Running a fan in a closed vehicle is not ventilation.  Running a nice [[hvac:roof_vent|roof vent]] without some way for air to enter the van accomplishes little.
-**Location of the air entrance/exit** is critical for cross-ventilation (moving air throughout the van). Cracking a window near the roof vent does little for areas further away in the van.  For best results, place the main vent at one end and the passive intake (or second vent) at the other end.

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