I saw that presentation. I must say the food was very good.
The full presentation of facts was nowhere to be seen or spoken.
Your already HAVE a radiant barrier on your ducts.
The radiant barrier on the insulation that they peddle at several thousands of dollars is incredibly inexpensive the "RadiantGUARD Radiant Barrier Ultima FOIL Insulation Roll 500 sq ft | 48-inch by 125-feet | U-500-B | HEAVY DUTY Perforated Foil Radiant Barrier Attic Insulation - Blocks 97% of Heat" from Amazon is less than 20 cents a square foot. I believe the special show price was 15.00 a square foot installed for an identical product.
If you believe the presentation then buy it from Amazon and pay someone handsomely to install it any you'll save several thousands of dollars.
The main problem with the "facts" presented is you are never told how much of the home's heat gain comes from heat radiating down into the home. It's 25 to 35% if there is NO INSULATION.
Let's say that is the case, to make this example extremely favorable to radiant barrier let's say that every month is as hot as August. Since 50 to 60% of your total electric bill is HVAC let's say you have a very high electric bill of 250/month let's go even more ludicrous and say there are no fees on this bill and all of it is for electric consumption. Let's go all in and say this radiant barrier is 100% effective.
So, $250 X 60% consumption in hvac X 35% savings = $52.50 monthly savings. 630.00 annually. At the prices I was quoted it would take over 12 years to recover.
But: every month is not August and you do have insulation and a large portion of your utility bill has nothing to do with your incremental consumption.
By my calculations the radiant barrier would recover it's cost in 76 years.
I have better ideas on how to invest my money.
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