VISTA AC

Single AC unit serving 2-story 1,200 sq ft paint store show room. Done on a 103 degree day. Immediately dropped interior air temp 7 degrees. Next day, also 103 degrees. Manager called and said it was 12 degrees colder than before the RCC was applied to the AC unit.

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by Hal Skinner on August 7, 2014 at 8:41pm

In most cases, water and a brush.  If the surface area is filthy, oily, greasey, what works best is liquid tide with bleach.  We will wet down the surface area, AC unit, metal roof etc, spray on liquid tide with bleach from a garden sprayer, scrub it, rinse it, let it dry.   100% environmentally friendly.  Once dry, spot prime any rust.  Spray or roller on the RCC.  Cooling effect is immediate.

Comment by Eric Kjelshus on August 7, 2014 at 6:35pm

what do you clean it with?  Most RTU are just nasty - grease from Kitchen to concrete  dust to road tar to bird dropping 

Comment by Hal Skinner on August 7, 2014 at 3:20pm

Our RCC is such a good sealant it is used as an encapsulant material for asbestos.  But, that had no bearing on this application.

 

I apologize for lack of good editing on here.  My vision is bad enough it is very difficult.

Comment by Hal Skinner on August 7, 2014 at 2:43pm

Hi Eric,

I did this one myself.  I cleaned it, masked off all the ID plates and stickers and painted on our RCC.  Nobody did anything with the outside air intake.

Our RCC has Solar Reflectivity of 0.83

                                 Emissivity of  0.90

Here is how that was explained to me by a couple of folks from energy labratories.

Using our numbers;  83% of the sun's heat energy is reflected away from the material.

This leaves 17% that actually enters the surface of the material.

Of THAT 17%, 90% of that is emitted back into the atmosphere.

Do the math and that leaves 1.7% that actually goes past  the RCC and enters the building.

 

If your numbers are referring to ther 'coloor spectrum, I will give an example of a white RCC does vs standard white paint.

@00,000+ sq ft metal building.  Egg processing pl;ant in Texas.  Metal roof was white from the factory (Baked enamel?)  Walls were a light yellowish tan from the factory.

First thing cpoated was the roof..  That immediately dropped the surface temperature from 196 degrees down

to 110 degrees.  It also dropped the attic air teperature by 60 degrees.  Iy was a 108 degree day.

The surface temperature of our RCC will alway be within 5 degrees of whatever the ambient air teperature is at that moment..

IT AINT PAINT!  :)

 

Comment by Eric Kjelshus on August 7, 2014 at 12:59pm

I have seen roof top units leak 45% on both supply and return.   I have see the slitter between supply and return just rot with leaking air- conditioned air hits hot air than rains.   Yours is more just color than sealing, black is 93% and white is 7% solar heat pick up.  How much of that is from closing the outside air off?

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Eric Kjelshus commented on Jeremy Begley's blog post The Home Envelope : Does it Really Matter in a Heat Loss Caculation
"IT all matters,  I lot of sealing,  A lot of air barrier.  A lot of "R" A…"
8 hours ago
Michael Dunseith posted a status
"BPI Infiltration and Duct leakage (IDL) Certified"
13 hours ago
Jeremy Begley posted a blog post
17 hours ago
Kim Burnett joined Sean Lintow Sr's group
Thumbnail

Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what…See More
17 hours ago
Kent Mitchell commented on Adam Swain's blog post Top Worst Crawl Space Insulation Ideas
"Hi Adam - It sounds like you may be referring to enclosed crawlspaces - Here in the NW we've…"
19 hours ago
peter chang replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"I think it is quite possible the greatest savings will be realized by the lowest volume users. I…"
20 hours ago
Marie Fuentes is now a member of Home Energy Pros
20 hours ago
peter chang replied to peter chang's discussion Programmable tstat for electric baseboard?
"Good plan, thanks. That looks pretty much like how I used to program mine (when I had one). Maybe…"
20 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service