Air Bubble In Thermal Reflective Insulation

Ask The Expert – Q & ACategory: Reflective FoilAir Bubble In Thermal Reflective Insulation
RIMA Expert Staff asked 10 months ago

In regards to thermal reflective insulation material with aluminum foil on both sides and polyethylene air bubble enclosed between the two layers of aluminum foils – what is the role of the air bubble and how does it contribute by reducing the heat transfer by radiation?

1 Answers
Best Answer
RIMA Expert Staff answered 10 months ago

The air bubble only contributes a small amount of resistance to heat flow by CONDUCTION. It has no effect on the radiant transfer. The other function of the bubble material is as a medium for holding the reflective surface(s) in place and providing a structure for easy installation.