Calculator ducts

STANDARDS FOR MEASUREMENT OF RECTANGULAR DUCT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1- The unit of measurement for the calculation of formulas is the meter and its result m².

2- Any result above formulas below indicate them 1 be billed as 1 m².

3- Perimeter flashing mouth increased by over, minimum 1 ml.

4- The telescopic necks are billed as two separate pieces, tion1 m long. everyone.