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Air Duct Sizing Calculator

Air Duct Sizing Calculator

$35.64
$32.99
& FREE delivery
  • ["Air Duct Calculator", "Equal Friction Method", "Duct Sizing", "<li>Brand: HVAC Charts</li>", "<li>Brand: HVAC Charts</li>", "<li>Brand: HVAC Charts</li>", "<li>Brand: HVAC Charts</li>"]
Brand: HVAC Charts
Part Number: 9W-7LPQ-JTV2
Manufacturer: Nash Enterprise
Product Dimensions: 8.75 x 4.0 x 0.3 inches
Item Weight: 0.8 ounces
Brand: HVAC Charts
Part Number: 9W-7LPQ-JTV2
Manufacturer: Nash Enterprise
Product Dimensions: 8.75 x 4.0 x 0.3 inches
Item Weight: 0.8 ounces
  • ["Air Duct Calculator", "Equal Friction Method", "Duct Sizing", "<li>Brand: HVAC Charts</li>", "<li>Brand: HVAC Charts</li>", "<li>Brand: HVAC Charts</li>", "<li>Brand: HVAC Charts</li>"]
Brand: HVAC Charts
Part Number: 9W-7LPQ-JTV2
Manufacturer: Nash Enterprise
Product Dimensions: 8.75 x 4.0 x 0.3 inches
Item Weight: 0.8 ounces
Brand: HVAC Charts
Part Number: 9W-7LPQ-JTV2
Manufacturer: Nash Enterprise
Product Dimensions: 8.75 x 4.0 x 0.3 inches
Item Weight: 0.8 ounces
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.

Shipping Fees

  • LnBMall.com offers FREE SHIPPING everywhere in the United States for ALL orders.
  • Packages are shipped from Monday to Friday.
  • No additional fees and charges.

Delivery Times

The usual time for processing an order is 24 hours (business days), but may vary depending on the availability of products ordered. This period excludes delivery times, which depend on your geographic location.

Estimated delivery times:

  • Standard Shipping: 3-8 business days
  • Expedited Shipping: 2-5 business days

Shipping method varies depending on what is being shipped.  

Tracking
All orders are shipped with a tracking number. Once your order has left our warehouse, a confirmation e-mail with a tracking number will be sent to you. You will be able to track your package at all times. 

Damaged Parcel
If your package has been delivered in a PO Box, please note that we are not responsible for any damage that may result (consequences of extreme temperatures, theft, etc.). 

If you have any questions regarding shipping or want to know about the status of an order, please contact us or email to support@lnbmall.com.

 

You may return most new, unopened items within 30 days of delivery for a full refund. 

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.

Additional non-returnable items:

  • Gift cards
  • Downloadable software products
  • Some health and personal care items


To complete your return, we require a tracking number, which shows the items which you already returned to us.

There are certain situations where only partial refunds are granted (if applicable)
Book with obvious signs of use

  • CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened
  • Any item not in its original condition, is damaged or missing parts for reasons not due to our error
  • Any item that is returned more than 30 days after delivery


Items returned to us as a result of our error will receive a full refund,some returns may be subject to a restocking fee of 7% of the total item price, please contact a customer care team member to see if your return is subject. Returns that arrived on time and were as described are subject to a restocking fee.

Items returned to us that were not the result of our error, including items returned to us due to an invalid or incomplete address, will be refunded the original item price less our standard restocking fees.

If the item is returned to us for any of the following reasons, a 15% restocking fee will be applied to your refund total and you will be asked to pay for return shipping:
 

  • Item(s) no longer needed or wanted.
  • Item(s) returned to us due to an invalid or incomplete address.
  • Item(s) returned to us that were not a result of our error.


You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.
 

Shipping Cost

We'll pay the return shipping costs for ALL orders.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

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