Wall Hatch WHT

Raise the air conditioning efficiency by A-4 grade high airtight type. 300 × 300, 450 × 450.

Installation Location

  • Inner Wall

Main Features

  • A-4 Grade Airtightness Performance
  • Raise the Air Conditioning Efficiency



  • 300×300(mm)
  • 450×450(mm)

Opening and Closing Part

  • Standard Specification (Key: only P201)

    The key is standard equipment. The door can open by right and left.

Color Variation

  • Silver Color

  • White Color (Baked Coating)


Airtightness Performance


Test Standard JIS A 1516-1994
Test Model: WHT-303・454

Test Results

A-4 Grade

Airtightness grade and airtightness grading line conform to JIS A 4706 (sash).

*Data are our test values and not guaranteed values.



Outer Frame, Inner Frame / Extruded Aluminum A6063S-T5 Anodized (Custom-Made Color Available)

Model No. / Dimensions

□300 □450
Model No. Key Type Silver WHT303 WHT454
White WHT303W★ WHT454W★
Dimensions Standard Dimensions 303×303 454×454
Wall Opening Dimensions 305×305 456×456
Inner Finishing Board Dimensions 258×258 409×409

* ★ is made-to-order. Please contact sales department about delivery date.
*Key type white’s decorative plate and cylinder part could not to be white color.


Custom-Made Color Available