
5" x 25' R8 Insulated Flex Duct HVAC Silver Gray Flex 4GF-8*5
Part/SKU: 4GF-8*5 BAGGED
$19.80
In stock
Available to order: 5.
Enter the total quantity you need. We will confirm availability and a quote before you order.
Request this quantity →This durable HVAC air duct calculator from LIMA is an essential tool for contractors, engineers, and technicians. Designed for field and shop use, it provides a fast and accurate way to calculate:
Duct conversion from round to equivalent rectangular sizing
Register & grille selection for effective air velocity, CFM throw, and terminal pressure loss
Duct weight per linear foot, simplifying material and cost estimates
Features:
Intuitive slide calculator design
Ideal for ductwork layout and sizing during system installation or retrofits
Used in HVAC performance evaluation and airflow diagnostics
Compact and easy to store in tool bags or field kits
Model: Air Duct Calculator
Brand: LIMA
REM Number: 4G8341
Made for: HVAC airflow systems – not intended for gas systems
Whether you’re sizing duct registers, estimating weight, or checking airflow, this is your go-to manual calculator for quick reference in the field.
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Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.
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