manufacturers of windows
Ontario  888-738-0738
Toronto  905-738-1870
Independent laboratory testing proves that Clera Windows by FM Industries are among the very best available on the market today.

Our Results:
Clera Casement- A3, B7, C5
Clera Awning- A3, B7, C3
Clera Double Hung- A3, B4, C4
Clera Double Slider- A3, B3, C4
Clera High Profile Fixed- F, B7, C5
Clera Low Profile Fixed- F, B7, C5

How Is Testing Performed?
Our windows are certified by the Canadian Standards Association in accordance with CAN/CSA - A440-00 . Testing is performed by an independent testing laboratory.

Window Certifications Explained
Air Tightness (A)
The air tightness test measures the volume of air that would pass through a closed window at an air pressure differential that represents a wind speed of 40 kph (25 mph). Performance is indicated by a number rating from A1 to A3. The higher the number, the more airtight the window.

Water Tightness (B)
The performance rating for water tightness is represented by the letter 'B'. Water tightness testing involves applying a uniform water spray at increasing air pressure (to simulate wind-driven rain) until water penetrates the window. Performance is indicated by a number ranging from B1 to B7 for windows. The higher the number, the more watertight the product

Wind-Load Resistance (C)
The performance rating for wind-load resistance is represented by the letter 'C'. Resistance to wind-load is a measure of the product's structural strength and is tested by applying increasing levels of air pressure to simulate the wind force. Air pressure is applied until until the product's operation is impaired. There are five levels of wind resistance for windows, C1 to C5. The higher the number, the better the performance.

Forced-Entry Resistance (F)
The performance rating for forced-entry resistance is represented by the letter 'F'. The standards for windows include a test to indicate how well the product may thwart entry within five minutes. One of two ratings is assigned, F1 or F2. For windows, F1 means the product has a lock, while F2 indicates it has a lock and it passes hand and tool manipulation tests. This test is optional for windows that are installed higher than two meters from the ground. F2 represents the higher level of security.

Screen Strength/ Ease of Operation (S/E)
The performance rating for screen strength is represented by the letter 'S'. Insect screens are not intended to serve any purpose other than to keep insects out. They are tested for tear, damage or retention in windows when subjected to loads. A rating of S2 is stronger than S1.