---
product_id: 374383964
title: "Air Duct Sizing Calculator"
brand: "hvac charts"
price: "C$3657"
currency: NIO
in_stock: true
url: https://www.desertcart.ni/products/374383964-air-duct-sizing-calculator
store_origin: NI
region: Nicaragua
---

# Water-resistant durable build Precision sizing scales Dual-sided multi-functional design Air Duct Sizing Calculator

**Brand:** hvac charts
**Price:** C$3657
**Availability:** ✅ In Stock

## Summary

> 📏 Master your airflow game with precision and style!

## Quick Answers

- **What is this?** Air Duct Sizing Calculator by hvac charts
- **How much does it cost?** C$3657 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/374383964-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

- • **Built to Last On-Site:** Crafted from thick, water-resistant paper with reinforced edges and rivets to withstand daily jobsite wear.
- • **Compact & Ready to Go:** Slim 4x8.5 inch design fits effortlessly in your tool belt or bag—never leave critical calculations behind.
- • **Instant Reference Guide:** Includes recommended duct velocities, sheet metal gauges, and essential HVAC formulas—no more flipping through manuals.
- • **All-in-One Dual Sided Tool:** Front scales meet back fitting equivalents and pressure drop charts—your portable HVAC bible.
- • **Precision at Your Fingertips:** Accurately size supply and return ducts using equal friction or velocity reduction methods for flawless HVAC performance.

## Overview

The Air Duct Sizing Calculator by Nash Enterprise is a compact, dual-sided HVAC tool designed for professionals to accurately size supply and return duct systems using equal friction or velocity reduction methods. Made from durable, water-resistant materials with reinforced edges, it features scales, fitting equivalents, pressure drop charts, and essential HVAC formulas all in one portable device measuring just 4 by 8.5 inches.

## 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

- Versatile HVAC Calculator: Sizes supply and return duct systems using equal friction or velocity reduction design method
- Dual-Sided Design: Front features scales for various duct sizes and properties, while the back offers fitting equivalents, pressure drop charts, and HVAC formulas
- Durable Construction: Made of thick, water-resistant paper stock with glued edges and corner rivets for long-lasting use
- Practical Reference Guide: Includes recommended duct velocities, gauges for sheet metal, and other essential HVAC data
- Compact and Portable: Measures 4 inches high and 8.5 inches wide, fitting easily into tool belts or bags for on-the-go use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Nash Enterprise |
| Brand | HVAC Charts |
| Model number | 9W-7LPQ-JTV2 |
| Product Dimensions | 10.16 x 21.59 x 0.1 cm; 27 g |
| Color | Rust |
| Material Type | Other |
| Manufacturer Part Number | 9W-7LPQ-JTV2 |
| Item Weight | 27 g |

## Product Details

- **Brand:** HVAC Charts
- **Colour:** Rust
- **Calculator Type:** Engineering/Scientific
- **Power source:** Battery Powered
- **Screen size:** 4 Inches

## Images

![Air Duct Sizing Calculator - Image 1](https://m.media-amazon.com/images/I/915Uh0HFT8L.jpg)
![Air Duct Sizing Calculator - Image 2](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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ni/products/374383964-air-duct-sizing-calculator](https://www.desertcart.ni/products/374383964-air-duct-sizing-calculator)

---

*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-03-20*