---
product_id: 266345517
title: "(Calculator) - Air Duct Sizing Calculator"
brand: "hvac charts"
price: "$85.98"
currency: USD
in_stock: false
category: "Hvac Charts"
url: https://www.desertcart.ec/products/266345517-calculator-air-duct-sizing-calculator
store_origin: EC
region: Ecuador
---

# Water-resistant durability Precision duct sizing Multi-method calculation (Calculator) - Air Duct Sizing Calculator

**Brand:** hvac charts
**Price:** $85.98
**Availability:** ❌ Out of Stock

## Summary

> 📐 Master your airflow game with precision and style!

## Quick Answers

- **What is this?** (Calculator) - Air Duct Sizing Calculator by hvac charts
- **How much does it cost?** $85.98 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/266345517-calculator-air-duct-sizing-calculator)

## Best For

- hvac charts enthusiasts

## Why This Product

- Trusted hvac charts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Portable:** Constructed with thick, water-resistant paper and riveted edges for long-lasting field use.
- • **Optimized for Efficiency:** Quickly determine recommended duct velocities and sheet metal gauges to streamline your workflow.
- • **All-in-One HVAC Reference:** Front and back scales cover friction, velocity, duct weights, surface areas, and pressure drop charts.
- • **Compact Yet Comprehensive:** Measuring just 4 x 8.5 inches, it fits easily in your toolkit without sacrificing critical data.
- • **Precision at Your Fingertips:** Handheld sliding calculator ensures exact duct sizing with equal friction & velocity reduction methods.

## Overview

The Air Duct Sizing Calculator is a compact, handheld sliding tool designed for HVAC professionals to accurately size supply and return ducts using equal friction and velocity reduction methods. Featuring dual-sided scales and charts for friction, velocity, duct dimensions, weights, and pressure drops, it offers a comprehensive reference in a durable, water-resistant format measuring 4 by 8.5 inches and weighing just 27 grams.

## Description

The Duct Sizing Calculator is a hand held sliding calculator used for sizing supply and return duct systems using the equal friction, or velocity reduction design method. Front of calculator includes scales for friction, velocity, round duct size, weight per linear foot of round duct, surface area in square feet per lineal foot of round duct, rectangular equivalents of round duct sizes, weight per linear foot of rectangular duct and surface area in square feet per linear foot of Rectangular duct. Back of calculator has equivalent feet of straight duct for commonly used fittings, corrected pressure drop chart, and many HVAC formulas. Pull out slide has recommended duct velocities, recommended gauges for sheet metal, and much more. The photo shows front side of the tool. This slide is made of thick durable water resistant paper stock with glued edges and corner rivets. Tool measures 4 inches high and 8.5 inches wide. Picture shows front and back.

## Features

- Air Duct Calculator
- Equal Friction Method
- Duct Sizing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006XIQ7DM |
| Adapter | HVACcharts |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #122,193 in Office Products ( See Top 100 in Office Products ) #123 in Scientific |
| Brand | HVAC Charts |
| Compiler | HVACcharts |
| Date First Available | 31 December 2012 |
| Display Type | Physical |
| Item Dimensions LxWxH | 10.2 x 21.6 x 0.1 Centimeters |
| Item Weight | 27 g |
| Item model number | 9W-7LPQ-JTV2 |
| Manufacturer | Nash Enterprise |
| Marimba | HVACcharts |
| Material | Other |
| Model | 9W-7LPQ-JTV2 |
| Power Source | Battery Powered |
| Product Dimensions | 10.16 x 21.59 x 0.1 cm; 27 g |
| Reader | HVACcharts |
| Recorder | HVACcharts |
| Standing screen display size | 4 Inches |
| Transcriber | HVACcharts |

## Product Details

- **Brand:** HVAC Charts
- **Calculator Type:** Engineering/Scientific
- **Colour:** Calculator
- **Power Source:** Battery Powered
- **Screen Size:** 4 Inches

## Images

![(Calculator) - Air Duct Sizing Calculator - Image 1](https://m.media-amazon.com/images/I/915Uh0HFT8L.jpg)

## Questions & Answers

**Q: Does the problem with sticker placement still exist?**
A: No.  Product identification stickers are easy peel removable labels.  Labels can be removed with little effort.

**Q: Would this be the appropriate calculator for flex ducting? It says round but I don't know if that's metal or flex.**
A: This calculator is not for flex ducting.  Flex ducting has a different friction loss and varies by manufacturer so there is no universal calculator that works for all flex ducting.

## Frequently Bought Together

- Air Duct Sizing Calculator
- REVISED AND UPDATED! HVAC Tables, Equations & Rules of Thumb Quick-Card
- Trane TD1 Ductulator with Sleeve, Duct Sizing Calculator

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**Shop now:** [https://www.desertcart.ec/products/266345517-calculator-air-duct-sizing-calculator](https://www.desertcart.ec/products/266345517-calculator-air-duct-sizing-calculator)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-01*