Does the problem with sticker placement still exist?

No. Product identification stickers are easy peel removable labels. Labels can be removed with little effort.

Would this be the appropriate calculator for flex ducting? It says round but I don't know if that's metal or flex.

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.

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📐 Size it right, size it fast — your HVAC edge on the go!

PORTABLE POWERHOUSE - Slim 4x8.5 inch size fits seamlessly into your tool belt or bag for instant on-site calculations
BUILT TO LAST ON THE JOB - Thick, water-resistant paper with reinforced edges and rivets withstands tough HVAC environments
ALL IN ONE HVAC REFERENCE - Includes fitting equivalents, pressure charts, formulas, and recommended duct velocities in one compact tool
DESIGNED FOR THE HVAC PRO - Optimized for equal friction and velocity reduction methods, ensuring industry-standard accuracy every time
PRECISION AT YOUR FINGERTIPS - Dual-sided design with friction, velocity, and pressure drop scales for exact duct sizing

The Air Duct Sizing Calculator by HVAC Charts is a compact, dual-sided sliding calculator designed for HVAC professionals to size supply and return duct systems accurately using equal friction or velocity reduction methods. Made from durable, water-resistant paper with reinforced edges, it features scales for duct sizes, pressure drop charts, fitting equivalents, and essential HVAC formulas. Measuring just 4 by 8.5 inches and weighing 27 grams, it fits easily into tool belts, making it an indispensable portable reference for on-site duct design and verification.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

R890

Duties & taxes incl.

South Africastore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Brand	HVAC Charts
Manufacturer	Nash Enterprise
Model	9W-7LPQ-JTV2
Product Dimensions	10.16 x 21.59 x 0.1 cm; 27 g
Item model number	9W-7LPQ-JTV2
Compiler	HVACcharts
Standing screen display size	4 Inches
Display Type	Physical
Power Source	Battery Powered
Batteries Included	No
Batteries Required	No
Adapter	HVACcharts
Reader	HVACcharts
Material	Other
Marimba	HVACcharts
Recorder	HVACcharts
Transcriber	HVACcharts
Manufacturer	Nash Enterprise
Item Weight	27 g

(Calculator) - Air Duct Sizing Calculator

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