OTHER PRODUCTS

WHAT IS THIN MULTIFOIL INSULATION?
Definition
How does it work?
Measure of the thermal efficiency

WHY CHOOSE THIN MULTIFOIL INSULATION?
THE RANGE
INSTALLATION GUIDELINES










How does it work?

Thin multifoil insulation acts against all forms of thermal transfer simultaneously (radiation, conduction, and convection).

Unlike traditional thick insulation - which principally acts against thermal losses occurring via conduction - the specific nature of thin multifoil insulation, combined with its application between two air gaps, forces energy to be transmitted via radiation rather than by conduction or convection.



LEARN MORE: Forms of thermal transfer

Heat is a form of energy which is transmitted from a hot zone to a cold zone, due to temperature difference. Heat is transmitted in 4 different ways, which are also the forms of thermal loss: radiation, convection, conduction and phase change (humidity/wind).

RADIATION:
Thermal transfer without physical contact
E.g. you can feel the heat being given off by a fire when you sit near to it.

How ACTIS insulation acts against radiation:
The external reflective foils of ACTIS insulation are extremely effective at reflecting infrared radiation back towards the source of heat (heating systems in the winter, and solar radiation in the summer). Each internal reflective foil acts as an additional barrier to thermal transfer by radiation.



CONVECTION:
Movement of warm air due to a difference in temperature and volume : hot air rises and heat dissipates.
E.g. A radiator heats the air in contact with it (conduction) and the hot air escapes upwards (convection).
How ACTIS insulation acts against convection:
Actis insulation reduces cold air infiltration in the winter, and warm air infiltration in the summer, which create thermal losses.



CONDUCTION:
Heat transfer via physical contact between solids, liquids or gases.
E.g. An electric hob in contact with a saucepan transmits heat by conduction.
How ACTIS insulation acts against conduction:
The low density separators (wadding, foam, etc.) between the reflective foils of ACTIS insulation products, create insulating air gaps, which are also barriers against conduction (same principle as double glazing)

  • Outside the multifoil insulation
    Installing the multifoil between 2 air gaps – so it is not in contact with the surface to be insulated – significantly reduces thermal transfer by conduction (the only conduction occurs between the insulation and the air – which acts as an insulator).
  • Within the multifoil insulation
    Very little conduction occurs given that the foils are separated by materials which create small air gaps which act as barriers to conduction.


PHASE CHANGE:
Heat transfer by change in physical state: solid, liquid, gas (the change from gas to a liquid state gives off heat).
E.g. condensation on the bathroom mirror is due to warm water which condenses on the cold mirror.
How ACTIS insulation products acts against phase change:
ACTIS insulation products are water tight.






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