RV and vandwellers wiki

User Tools

Site Tools

Trace:
hvac:insulation

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
Next revision Both sides next revision
hvac:insulation [2022/01/21 23:03]
princess_fluffypants [Tips and Tricks] 		hvac:insulation [2022/01/21 23:14]
princess_fluffypants [The effect of "Total" R-Value]
Line 25: Line 25:
 ===== The effect of "Total" R-Value ===== ===== The effect of "Total" R-Value =====
  
-Total R-Value is the //total// R-Value of a given construction.  This takes into account the fact that different parts of a building (or a van) will have different inherent thermal transfer/insulation properties.  For example, a well-constructed residential wall in a house in a cold climate might have an R-Value of 20 (1/2" plywood, then 1" of Poly-Sty, then a vapor barrier, 3.5" of fiberglass batting with wood studs forming the wall, then 1/2" drywall), while a solid-core door might have an R-Value of 4 and double-pane windows might have an R-Value of 2.5.+Total R-Value is the //total// R-Value of a given construction, taking into account all the different R-values of the different sections that it might have. For example, a well-constructed residential wall in a house in a cold climate might have an R-Value of 20((https://www.e-education.psu.edu/egee102/node/2064)) (1/2" plywood, then 1" of Poly-Sty, then a vapor barrier, 3.5" of fiberglass batting with wood studs forming the wall, then 1/2" drywall), while a solid-core door might have an R-Value of 4 and triple-pane windows might have an R-Value of 2.5-3((https://homesteady.com/differences-single-double-pane-glass-8600425.html)).
  
-Total R-Value is the calculation that works out, when given the square inches/footage of the different R-Values, what the effective R-value of the whole structure will be.+A basic van insulation build for the walls will have an R-Value of **~5** ((some sheet insulation like 400 thinsulite, some mini-cell foam for the floor and a basic liner to cover up all of the ribs and make sure we don't have any exposed metal)), and a crazier build for ski bums might have an R-Value as high as **8-10** ((Filling every single nook and cranny with 600 Thinsulite, mini-cell foam and poly-sty sheet for the floors, maybe poly-sty for the walls as well covered with plywood or wood slats or even 4-way stretch carpet)).
  
-Vans are really hard to insulate well in the first place, because they've got a metal skin which is connected directly to metal ribs which act as fantastic (or terrible) thermal bridges. A basic van insulation build for the walls will have an R-Value of **~5** ((some sheet insulation like 400 thinsulite, some mini-cell foam for the floor and a basic liner to cover up all of the ribs and make sure we don't have any exposed metal)), and a crazier build for ski bums might have an R-Value as high as **8-10** ((Filling every single nook and cranny with 600 Thinsulite, mini-cell foam and poly-sty sheet for the floors, maybe poly-sty for the walls as well covered with plywood or wood slats or even 4-way stretch carpet)). +Single-pane windows (Such as used in cars) has an **R-Value of 1** ((actually closer to .91)). 
- +
-Single-pane windows (Such as used in cars) has an R-Value of 1 ((actually closer to .91)). **This is why you really need to insulate your windows!!!**+
  
 Let's look at some examples of how this dramatic heat loss from windows affects the total insulation of your van using [[https://www.cascadiawindows.com/tools/r-value-u-value-calculator|this total R-Value calculator]]. Let's look at some examples of how this dramatic heat loss from windows affects the total insulation of your van using [[https://www.cascadiawindows.com/tools/r-value-u-value-calculator|this total R-Value calculator]].
Line 56: Line 54:
  
 //WILL YOU LOOK AT THAT!// Just by covering the windows, poorly, and insulating the rest of the van to a kinda-mediocre level, you've got NEARLY TWICE the total system insulation as if you did a completely nutso, bonkers, over-the-top insulation job but haven't covered the windows! //WILL YOU LOOK AT THAT!// Just by covering the windows, poorly, and insulating the rest of the van to a kinda-mediocre level, you've got NEARLY TWICE the total system insulation as if you did a completely nutso, bonkers, over-the-top insulation job but haven't covered the windows!
 +
 +**TL;DR - COVER YOUR DANG WINDOWS IF YOU'RE TRYING TO STAY WARM**
 +
 +Speaking of...
 +----
 ===== Windows ===== ===== Windows =====
  
hvac/insulation.txt · Last modified: 2023/08/22 21:36 by princess_fluffypants

Page Tools

affilliate disclosure | the RVwiki runs on a virtual server from Phanes

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki