Series AL and SL Return / Exhaust Air Louvers have fixed horizontal louvre blade spaced on approximate 32mm (AL) and and 45mm (SL) Centre. The louvre blade are arranged to overlap each other to be vision proof with the deflection facing away from the line of sight.

HINGED TYPE AIR LOUVRES (FIXED BLADE)
SERIES : AHTL, SHTL Series AHTL and SHTL Return inlets have fixed horizontal louvre blade spaced or approximate 32mm (AHTL) and 45mm (SHTL) Centre. They each form a single unit return louvre with hinged to mounting frame with space for a filter pad. The are designed to function as intake grilles on unit air conditioners of on unit ventilators which are norminally suspended in the ceiling soffit or located low in the sidewall.

FEATURES Series: AL, AHTL • Overlap Margin — 1-1/4 inches wide (3/4" and 1/2" available if specified)
• Aluminium Construction Heavy Gauge extruded Aluminium Blade and Margin.
Baked and powder coating finish, special paint and anodic finish available.
Series: SL, SHTL • Overlap Margin— 1-1/4" inches wide (3/4" & 1/2" available if specified)
• Mild Steel — Heavy Gauge Steel construct margin and blades.
• Baked Enamel and powder coating finish special paint finishes available.
HOW TO SPECIFY: AL : Aluminium Air Louvre.
AHTL : Aluminium Hinged Type Air Louvre
SL : Mild Steel Air Louvre.
SHTL : Mild steel Hinged Type Air Louvre
Series: AWPL are recommended to install at External wall of Building. And was specically designed for Fresh Air Intake and Extract purposes.

型號：AL，SL AL 及SL型號百葉簾廣泛用於排風和回風功能上，葉面分別有32mm（鋁合金）45mm（鋼製）兩種葉距，所有葉片會有適當重疊，使視線不能直達風管內，確保美觀。 型號：AHTL，SHTL AHTL及SHTL型號門較式風口，葉面分別有32mm（鋁合金）45mm（鋼製）兩種葉距，每一個風口均能活動開關方便維修隔網或其他用途，此種設計在牆壁或天花吊頂均適合安裝。

特性 型號：AL，SL特性 冚口邊 - 有1-¼”，1"，¾” 闊供選擇，配合客人要求。 鋁合金面經過無色陽極化處理，也可由客人自選顏色焗漆上色。 型號：AHTL，SHTL特性 冚口邊 - 任何尺寸均可指定訂做，標準供應為1-¼”。 鋼製風口可由客人自選顏色焗漆上色，標準供應為白色。