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.

Views: 29

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.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Green Training USA posted events
1 minute ago
Crosbey Archery posted a photo

Timber-Double-doors

This door is made and hand finished at Bradford workshops by skilled craftsmen.…
4 hours ago
Green Training USA updated an event
Thumbnail

BPI CEU's - Online Anytime at Online

December 4, 2014 to December 3, 2015
Get All 30 BPI CEUAvoid BPI's Written Exams for Certification Renewal…See More
5 hours ago
David I. Shepherd-Gaw added a discussion to the group Job Board
Thumbnail

JOB: Energy Efficiency Specialist @ Cowlitz PUD

Primarily a position with a residential focus in a great community. Opportunities to expand your…See More
10 hours ago
David I. Shepherd-Gaw joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
10 hours ago
John Wilkerson posted a discussion

Aeroseal Machine for Sale

Hello All, We have an Aeroseal SmartSeal system (w/ compressor and plenty of leftover…See More
11 hours ago
Rob Buchanan commented on Jose Macho's blog post Why Don't Homeowners Spend Money on Energy Saving Upgrades??? Blame "Cognitive Biases"
"I think this is an interesting comparison, but I would also want to know whether similar surveys…"
18 hours ago
Bob Blanchette commented on Jose Macho's blog post Why Don't Homeowners Spend Money on Energy Saving Upgrades??? Blame "Cognitive Biases"
"The bigger problem is the way water is billed. Most of the charges are a fixed monthly amount that…"
18 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service