Is "round duct" flex duct or rigid spiral duct?

This calculator is for rigid duct only, so the proper answer is rigid.

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📐 Elevate your airflow game with precision and style!

DUAL SCALE MASTERY - Seamlessly switch between imperial and metric units for global-ready duct sizing.
ULTRA LIGHT PORTABLE - At just 86g and slim profile, carry precision duct calculations anywhere with ease.
ASHRAE RECOMMENDED DESIGN - Built-in airflow velocity guidelines ensure industry-standard accuracy every time.
VIBRANT MULTICOLOR CODING - Quickly identify measurements with intuitive red, green, blue, and more hues—no guesswork needed.
LIGHT TRANSMITTING PROTECTIVE SLEEVE - Durable, translucent cover safeguards your tool while keeping readings crystal clear.

The Trane TD1 Sleeve-Equipped Duct Size Calculator is a lightweight, battery-powered plastic tool featuring dual imperial and metric scales, a multicolor design for easy reading, and a translucent protective sleeve designed to meet ASHRAE airflow velocity standards—perfect for HVAC professionals seeking accuracy and portability.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Brand	Trane
Model Number	TD1
Product Dimensions	26.04 x 22.23 x 0.33 cm; 86.18 g
Color	red
Material	Plastic
Power Source	Battery Powered
Are Batteries Included	No
Item Weight	86.2 g

Trane TD1 スリーブ付きダクトサイズ計算機

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