Simple Duct Sizing - Part 2

[@catherinegeiling5625]

Your videos are so informative - we're renovating (okay completely gutting) a 100 year old house and the existing ductwork is quite 'odd'. Your videos helped us immensely in making sense of what should be ... and cross your fingers what will be. Thanks!

[@abledistributors]

Thank you, best of luck. Brian...

[@markdion9932]

Thanks been waiting for this video , now I can work out my problem areas.👍

[@abledistributors]

good luck, here to help.

[@alex68aguilar]

Following from the city of chihuahua mexico Keep up the good videos Thanks!

[@abledistributors]

thanks for checking out the video, I'm working on a bunch more, stay tuned . Brian..

[@JoeShepardsLife]

Great info!! I'm doing a house right now that I bought, it's a small 750 sq ft house with two bedrooms. it's on a crawl space and the current furnace is a 40,000 BTU payne brand upflow furnace that was turned upside down to make a downflow. But the flex ducts that are run under the house are disconnected, full of trash and there is no plenum. They just all connect together underneath the floor. So I'm thinking about turning the furnace upright again making it a upflow and running the Supply ducts through the attic with a 16x8 plenum. Then I will have one large return in the middle of the house pulling the heat down to the floor. That way I don't have to mess around in the crawl space reinstalling the pipes, especially because it will need dug out. I know the floor may be a little bit cold but I'm okay with that.

[@abledistributors]

Flex duck is used sometimes to often, it cuts down air flow, it makes it difficult to clean, won't keep out mice and rats, but it's faster and easier , I always prefer steel duct insulated on the outside, sometimes you sill need to run branch ducts in flex. good luck, take your time.

[@dinabrown6529]

I have a conundrum, I have a 3 ton 16 seer in a 1200sq ft home with 4 inch octopus soft ducts , and a 16x25x1 inch return lol. Hvac installed 3 years ago cant use the good filters because my system gets restricted. But with such a newer system I dont want to use fiberglass and risk the evap lol. At the time of install was told the ducts would be fine with an oversized unit as it would push the air better. Im so screwed cant afford new ducts now.

[@kernsy6715]

Great video. I have a Goodman 4ton modulating 120,000 btu furnace. I have 3 cfm output on panel that range from 1670-2200 cfm. My furnace is located in basement, I have a 16’ trunk on left side of house and a 36’ trunk going to the right side of the house. When I start to build off the plenum does the first run on both side have to equal and be around that range of cfm or does the longest run has to start off being that cfm range?

[@GCRAAY]

I don’t suppose you guys offer a duct design service cheap? Mine is simple. Ranch, crawl, center furnace, left right 5 take offs each side. 1500 sqft 3 ton. I’m looking for round main trunk lines. Easier for me. I’ve learned a bunch, but I’m not looking to find out I screw up something simple. I don’t even need a cad drawing. Plenum size Starter from plenum size Then how often to reduce. Currently have a rusted out system, and I don’t trust it was done right when first done. 5 take offs all on one side no reductions. Long story.

[@abledistributors]

first off, Thank You for checking out our video. Unfortunately we do not offer duct design services, there may be "on line" type layout and design help, there seems to be an app for everything now. Good Luck, Brian..

[@GCRAAY]

@@abledistributorsAwe poop! Thanks anyway.

[@NK-ic6yt]

@@abledistributorsHello, while you do not offer duct design, would you refer non-professionals to reputable HVAC design only firms in Chicagoland? It seems that the majority of the HVAC companies want to design AND install the work. Thank you