gyre wrote:Someone put reflectix scrim over an rv last year and reported good results.
Ratty wrote:I'm picking up some new remnants of 'swimming pool cover' this morning. It's opaque , blue, heavy duty bubble wrap. I plan to cut it to cover my windows. I hope it keeps my van cooler. I know it will help me sleep-in a little longer by just blocking the sun.
Canoe wrote:Shiny plastic (like cheap store-bought vehicle window/windshield reflectors) reflects sun light, but absorbs a large portion of the heat.
Bounce530 wrote:Canoe, are you saying that if you make a 'coozy' for a cooler with those cheap store foil bubble wraps, that it would actually warm up the cooler, rather then keep it at a lower temp, then if it had nothing on it?
skippy3k wrote:Canoe wrote:Shiny plastic (like cheap store-bought vehicle window/windshield reflectors) reflects sun light, but absorbs a large portion of the heat.
Damn. I just finished my truck window reflector project using cheap store-bought vehicle window/windshield reflectors.Where were you while I was standing in the store deciding on the material to use???
Heat Cheat Sheet For the Most Comfort (and Least Need for A/C)
Stop Hot Air from getting inside – Seal air vents, windows & roof vents (and doors you won't use)
- tape openings and seams with painter's, freezer or gaffer's tape (no duct tape!)
- when taping outside, do not leave any pull-tabs or lose scraps of tape for the wind to catch – a strong or lasting wind can rip the tape off
- Bonus: helps keep dust out too!Seal or cover on the inside, not outside, if you want to be able to remove seal/cover to open something without having to go outside first.
Fresh air? Emergency Use?
Block Sun and Heat – Cover windows, skylights, roof vents and windshield
- foil-sided bubble-wrap works well – reflects sunlight & heat away; easy to store and reuse
- cover windows, skylights & roof vents – and their frames!!!
- tape covering material to the surrounding surface, completely sealing all edges
- with covers on the:
- Outside – gaffers tape is the most reliable
- if the tape gets sun, protect the tape with a cheap foil tape
- Inside – painter's or freezer tape works well
- extend the cover onto the surrounding surface to reduce heat from heat-creep
- if the frame gets sun – for best heat rejection cover the frame on the outside (can extend a bit onto the window to also shade the frame behind glass), with easily removed tape (and way better with a cheap foil tape on top of that tape!)
- North-facing windows (not in sun) benefit from a cover against radiated heat
- cover on inside to avoid having to climb on roof.
- Use two or three layers of foil-sided bubble-wrap to maximize heat rejection.
- Cover a larger area out onto the surrounding ceiling (reduces heat-gain from heat-creep).
- for super heat blocking:
- add a second layer of foil-sided bubble-wrap to windows
- put a layer of foil-sided bubble-wrap on the whole ceiling
Optional: Use a Swamp-Cooler (and Instead of A/C)
- cools while providing some humidity
- provides fresh air, but without the heat (or dust)
- cools on demand
- Playa-Tested designs available, including irrigated self-dust-cleaning filtration
- components available that run on 12 VDC (deep-cycle battery)
- uses little power, and specific power requirements are well known
- easy DIY build with inexpensive parts (and with ePlaya support)
- no A/C heat-exchanger fins to get clogged or corroded
- save wear & tear on your A/C unit
Ratty wrote:So. Does that mean that my pool cover painted with silver , (plastic bonding), paint is good or bad? It's just heavy duty bubble wrap.
Canoe wrote:...If it's not silver already, then see what paint will reflect the most, both for sun (visible) and heat...Ratty wrote:So. Does that mean that my pool cover painted with silver ...
Canoe wrote:... I had tracked down some rattle-cans that had suitable reflective paint, but I don't know if I saved that info. I'll look.
...Edit: apparently, what we'd want for heat reflective paint is "vacuum metallized aluminum pigment in lieu of a standard aluminum flake".
Canoe wrote:... goth sunlight and heat.
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