Posted by:
promist
at Fri Nov 12 07:21:00 2004 [ Email Message ] [ Show All Posts by promist ]
The bubble foil doesn't give much in the way of actual R-value due to material type and density, rather it is rated mostly on the reflective value due to the foil facing. The rigid board insulation such as Celotex, Tuff-R and other brands will provide a greater material R-value and the reflective value due to the aluminum facing. With the rigid insulation, you will not only gain from the reflectivity of the foil, but you will also reduce conductive losses as well, so I do recommend the rigid insulation if it is an option. If not, the bubble foil is an alterative to reduce the radiant losses through the bottom of a cage. Bubble foil will be less effective on the side or top of a cage as the fundementals regarding methods of heat loss are different and the rigid insulation would be much more effective if used on these surfaces.
Remember that an airspace has to be provided between the heated surface and the foil face so the energy can reflect off the surface. Most manufactures recommend a minimum of a 3/4" airspace bewteen the heated surface and the foil. If the foil is placed directly against the surface, one will gain little benefit for the effort.
Bob @ Pro Products
Pro Products
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RE: DZ & Bill... - promist, Fri Nov 12 07:21:00 2004