Nakajima Glass Company, Inc.

Insulating Glass Unit

Heated Insulating Glass Unit / For Freezers / Twin Thermo Glass

Thermal InsulationCondensation Prevention
Space-Saving High Insulation
Thinner Air Layer
We offer argon gas, which has better insulation performance than air, and even higher‑performance krypton gas as gases for the insulating layer, to meet your specific requirements.
 Air
12mm
Argon
10mm
Krypton
6mm
Thermal transmittance
(W/m2·K)
2.892.802.78
Multi‑Layering with Heat Mirror
Even when further multi‑layering is required for higher insulation performance, multi‑layering using Heat Mirror keeps additional thickness and weight to a minimum, as only the air layer is added.
Comparison of multi-layer structures using glass and Heat Mirror
Heated Type
Uniform Heating
Because the heated type uses a surface heater, the entire surface heats evenly, quickly removing condensation across the whole surface (electrode areas do not generate heat. For the perimeter, where the influence of spacers is greater, we recommend the use of cord heaters).
Thermographic confirmation of uniform heating
Stable Inorganic Heating Element
Inorganic materials are used for the heating element, providing high stability and reliability even under changing operating conditions.
High Efficiency
The heating surface coating is designed with low emissivity to reduce heat transfer into the refrigerated space, improving insulation performance and warming the condensation surface efficiently.
RoHS Compliant
Lead‑free solder and electrode paste are used for the heated glass, and the product complies with RoHS regardless of whether the heated specification is selected.
Specifications / Precautions

Minimum dimensions: 180×350mm
Maximum dimensions: 2,400×3,200mm
(HM spec): 1,800×3,200mm
Maximum weight: 350kg
Total thickness: 18–52mm

  • Argon and krypton gases are inert gases (colorless, odorless, and non‑toxic).
  • The values shown are in‑house calculated results based on simulations.
  • This product may fall under Japan’s PSE (Electrical Appliance and Material Safety) Law. Since it is supplied as a built‑in component, please obtain PSE certification for the final assembled product.
  • Please also read the precautions for Twin Glass.