Caption: Kingspan underscores Kooltherm K20's potential to attain higher thermal performance in thinner profiles than conventional insulation boards: R-value
up to R17 in 2-in.
Pearson corelation after treatment in this group showed conversion of significant negative correlation prior to intervention (p-value 0.003 and r-value
-0.955) to non significant positive correlation (p-value 0.513 and r-value
Conversely, through the criteria based only on [pH.sub.45min], on [pH.sub.45min] and R-value
(HONIKEL & FISHER, 1977) and only on [L.sup.*] (MAGANHINI et al., 2007), most of the samples (53 to 68%) were classified as RFN, whereas a large part of them (32 to 38%) was classified as PSE.
rates reflect a product's ability to restrict heat flow which, in turn, reduces energy costs: the higher the R-value
, the better the product's insulating ability.
Poor sealing characteristics were a problem in some, and many had R-values
too low to prevent frost from building on the surface of the door panel.
The performance of the constructed models was evaluated on the basis of R-value
and MSE analyses.
The thermal conductivity of the panel with 5-mm layers was 0.0532 W [m.sup.-1] [K.sup.-1], which corresponds with a US R-value
of 6.8 (2.7/in.
Density, k-factor, R-value
and percent closed-cell content were measured.
* Polyiso (polyisocyanurate) or polyurethane foam installed under the roof system, instead of in the attic floor, helps seal the building against leaks and helps increase the R-value
of the roofing system.
Both are available in rolls and batts with an R-value
of between three and four per inch of thickness.
Table 1 shows that with a calculated r-value
of 0.400, there is significant relationship between multiple taxation and tax evasion in Lagos State.
Griffiths and Zuluaga (2004) used a two-dimensional, steady-state FEM to calculate the effective R-value
of ducts buried under three levels of loose-fill insulation, as shown in Figure 1.