R-value


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R-value

A measure of the heat conductivity of material.The higher the R-value,the better the insulating qualities.The Federal Trade Commission,in something called the R-Value Rule,requires certain disclosures regarding insulation. Among other things, new home sellers must put the following in every sales contract: the type, thickness, and R-value of the insulation that will be installed in each part of the house.Failure to make the required disclosures amounts to a deceptive trade practice and is punishable by fines.For full text of the rule, see 16 CFR 460 available at the Government Printing Office Web site at www.gpo.gov.

References in periodicals archive ?
Chord size did not affect the R-value for assumed chord lengths of 4 to 40 feet.
With this insulation we get a good R-value without having to add a lot of bulk.
Frasen said the insulation required by the building code jumped a total of two R-values in some instances (from R-20 to R-22).
When the geometry of the duct and insulation materials and the inner and outer surface film resistances are considered, however, the true R-value of the insulation can be significantly different than the nominal rating (Palmiter and Kruse 2006).
The thermal performance evaluation of the homes was based on R-value data from Oakridge National Laboratories.
The acting R-Value of Durisol (R30-R40) is approximately double that of standard stud wall construction.
When replacing windows look for the R-value of the panes, which marks the effectiveness of preventing heat loss.
The origins of the R-value Rule date back to the energy crisis of the late 1970s when skyrocketing home heating and cooling prices caused a spike in demand for quality residential insulation products, which in turn led to an increase in the number of firms manufacturing these products.
The polystyrene and air gaps in the block add insulative properties and, when sealed, give a 10-inch-thick wall an R-value of 36, more than twice that of traditionally framed walls.
a three-string (wheat straw) bale laid flat (23 inches wide) [has] an R-value of R-54.
The new high R-value glass system provided by Serious Energy above the trading floor will improve our energy efficiency and provide another example of our commitment to sustainable operations.