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Keder Energy Saving Comparisons
We are really proud of the high quality and energy saving properties of the Keder cladding system and we are delighted to share the comparisons of our 9 layer laminate against other materials used in typical greenhouse or polytunnel construction.
R-Value Thermal Resistance
Thermal resistance is the temperature difference (at a steady state) between two defined surfaces.
The higher the number, the better it is
Keder 1.7
Single Glazed Glass Greenhouse 0.7
Single Glazed
PE Film 0.7
Single Glazed
Polycarbonate 0.7
Double Glazed
Polyethylene with
2" air gap 0.7
U- Value Thermal Conductance
Thermal conductance is the rate of time (at a steady state) the heat flows through a measured unit of material, induced by a temperature difference.
The lower the number, the better it is
Keder 0.5
Single Glazed Glass Greenhouse 1.4
Single Glazed
PE Film 1.4
Single Glazed
Polycarbonate 0.9
Double Glazed
Polyethylene with
2" air gap 0.7
K- Value Thermal Conductivity
Thermal conductivity is the rate of time (at a steady state) the heat flows through a homogeneous material, induced by a temperature gradient.
The higher the number, the better it is
Keder 27.0
Single Glazed Glass Greenhouse 2.3
Single Glazed
PE Film 3.1
Single Glazed
Polycarbonate 8.7
Double Glazed
Polyethylene with
2" air gap 4.9
Although we are comparing very different products, at first glance consumers often confuse a Keder Greenhouse with a Polytunnel and often expect our prices to be in line with Polytunnel prices.
Buyers of polytunnels often say to us "If they had their time over again, they would invest in a Keder, as the long life, easy maintenance, diffused light and extremely superior materials is well worth the initial investment".
As you can see from the figures above, there really is no comparison.
Which is why Keder is the experts choice