someone related to flow.. was redoing the ductwork in an older home that had a newer furnace/ac. I asked the tech to clean the coil while we had the unit disconnected and when he pulled it out, to my surprise we found the installation manual laying there right on top of the coil, blocking flow. Guys, always check the new unit and remove foreign paperwork! That 8.5x11 manual had been there for a few years!
Thanks for the free video. Glad your members get to see the most important stuff. Just know that on my iPad, there is no way to join and be a member. All I see is the subscribe button. And I’m sure most people are in the same boat who click a video only to find out that the main info is behind a paywall that they can’t get to.
Hey thank you so much for this information I had no idea I wish there was a way around that I know there are so many people that need my content but they are not able to see One day I hope to be able to give it away for free
How do I know the maximum airflow, CFM, that can be handled by some 6” flex duct I have in my attic, if I put in a booster fan to be able to increase aire flow at certain times? The duct says 4000 FPM maximum, it’s 6” duct and I’ve got about 15’ of duct run before the booster fan and then 15’ after the fan to the vent? The fan at top speed says it puts out 400 CFM. Thanks in advance for any help on this.
For example, a large house(3300sqft) worth of flex is $2250 in JPL but if I want to use Quietflex it would be $3350. Both R-8 metalized flex from the same supply house. It would be great to know why someone would pay an additional $1100. Quietflex does highlight their “rip-stop” scrim reinforcement. So maybe if there is a location in the attic that likely to get damaged spend the extra for “rip-stop”?
Hey that's awesome! I was like #300 I should get a free hat or something 🤔 love the videos man! I know your doing the fellow hvac man a lot of good service by this video. I personally learn better through videos rather than reading books, thanks for being that somebody who is teaching this way
Question, i have less than 900 square ft home i was given a carrier 3.5 coil with heater blower. i was told that a 3.5 is too big for my home. and i should use a 2.5. i now have a 2.5 condenser by carrier. the house has 2 br,bath, kit, living room and a dinning room off the kit. in the hallway i only have room to access the attice there is no place for a large return. i am told i should put the returns in the ling room and bed room. i am doing the install by myself. what size vents and ducts should i use. i know the coil and condenser don't match. but which is better the coil being bigger or or smaller?
@@TaddyDigest Thanks for answering the question, it comes from the fact that I have a 2,100 sqft house but the unit I have is Lenox 3ton, it cools well but I have to set the thermostat to 69 to 70 to be comfortable. From the plenum they got a direct 7,4,7,9, 4,6 then they used flex #14 from the plenum for the mixing box and distributed 4 outputs of 4,9,4,6 flex then a 10 flex of the 14 flex that is in the mixing box to supply 4,4,4,7 flex I’m in the trade around 3 years and continue learning thanks
little confused looking at buying a wood furnace the blower is 1800cfm but yet the out is 2 8 in pipes by the numbers that maybe good for 400 cfm total.... help this doesn't make any since to me.
Is there a formula for an air return duct size in relation to the supply size in a small sealed room? In other words I will be supplying a room with 2- 6" ducts. What should the return air size be?
Looking at your chart is really helpful, but since I need help with commercial ductwork, the cfm I need isn't on your chart. what do I need for a 24,000 cfm unit?
Can I hire you to guide me thru changing the entire ac system in my home. I have ten years experience in home renovation. Ive never done hvac work other then adding power or gas to a unit. Thank you in advance.
I was at a house the other day where my suction pressure seemed a little low and I had 2 degrees of super heat. When I went inside to the furnace to take total external static pressure, it was rated for .5 but I was getting 0.8. I got .27 before my blower and .56 after my heat exchanger. I thought my evaporator coil maybe the problem because I was getting a pressure drop of .3 across it. I got .56 before the coil and .26 after the coil. I chemically cleaned the evaporator coil and even used a hose. That coil is spotless. Nothing changed as far as static pressure. I don't know the rating for that coil for pressure drop because there is no model number that I can find. The outdoor unit was a 5-ton so I'm assuming the evaporator coil was correct since it was the original evap coil since the house was built. So I started looking at duct sizing. I had a 20-in flex duct for my return. It literally 90 right off of the air handler and to the filters. I think I was getting plenty of airflow since my static pressure before the blower was .27 For my Supply I had three 14-in flex ducts and one 6 in flex duct going to some little room. I don't know if I didn't have enough Supply duct but it almost seems like the coil was like a brick wall. I should have pulled one of the 14 inch ducts off and check my static pressure but I don't think that would have changed anything since I was getting 0.26 after the evaporator coil. Anyway, i believe I have sufficient Supply. But I'd like feedback if possible
@@biblebloopers946 is the txv adjustable and did you try lowering the fan speed? Also check if sensing bulb for txv is properly and securely attached and well insulated. What was your subcool on pressures?
Hey Eddie thank you my brother for joining. If you haven't sent me an email. Here is my email tadfuller1@gmail.com I should have a video on return duck sizing If not I will make one
My house is 800 sqft. We just had a two ton unit installed. We have 6-4” and for some reason our bedroom don’t cool as it should. The bathroom and basement is beautifully cool. We have to run window units when the temp gets hot. The thermometer in our house says it gets between 78-85 degrees which is insane considering we put the thermostat to 65 to cool the house. We need the bedroom cool because we don’t want our dogs to be heated. What should we do?
Maybe your air conditioner is short cycling because it's over sized(it technically should be 1 or 1.5 ton depending which area of the heat zone you live in) Maybe duct work is sized poorly. Maybe your dampers are closed in the pipes under your supply air grills in the rooms. A proper technician can find the problem.
All of the rooms of my home are even temp with the doors to the rooms open. When doors are closed, (why have a door if your not gonna close it), the smaller rooms with the door closed get warm. Seems like no one allows for this common thing!
Hello, How would you calculate a mobile home split system with an inside down flow air handler 3 ton . No return . The Mobile home is 16X80 single wide with 8 vents total. The original duct is the rectangular sheet metal, and it is degrading.The mobile home is 1999 model . The local supply shops do not have the sheet metal available & I am considering using Flex duct & I am not sure what size or may I even use flex duct in replacing the sheet metal . Thank you
Hey Richard great question I need to do a video about trailer units very soon I've been thinking about this for a while I will do a video and I will send you the link when I do it
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I have a unique situation. I’m a DIYer. I have a 440 sq ft hunting cabin. The size may go up to as much as 770 sq ft in the distant future. That being said, I have an electric furnace with a 1.5 ton condenser. The ductwork will be a straight run from one end to the other. It’s 38’ long. Am I fine installing 12”x 8” rectangular ductwork? Thx for any help. I’ll be purchasing ductwork this week
right here my friend Level 3 Join this channel to get access to perks: ru-vid.com/show-UCuMyjTVlkM4xZ5z_eSyoB1wjoin Wanna Learn more about hvac? Check out my hvac tips for technicians playist. ru-vid.com/group/PLVjetZt5xgenmO76adHwb2ctyeBIFKUus
Is there a chance I can pay someone (you?) to design my duct system? I have a large two story building and just want to run a main line down the middle and branch out to the upper levels floor venting, having only a few outlets for the lower level. The building is 90 feet long and 40 feet wide, so do I need to reduce my main line to keep pressure up? Things like that seem like it would be easy for someone who dose this stuff, I just don't know where to find someone to ask.
Absolutely that's what I'm here for Go check out my membership levels I can do what you want Join and become a member my level 5 membership or level 6 membership is what I recommend Join this channel to get access to perks: ru-vid.com/show-UCuMyjTVlkM4xZ5z_eSyoB1wjoin
He means in order for the correct amount of airflow to circulate through the ducts with a 2Ton system you require 8 ducts that are 6” minimum in size. 6” ducts carry 100CFM each. 2Ton = 800CFM = 8 * 6” ducts
Ok thank you I always wondered I was under the impression 16 seer gas pack was equal to a 16 seer split system so I understand now all seer aren't the same.
I just had a entire system installed last January 2021 American standard gas package my home never had one and I really looked at the york system's but I was kinda of afraid of the micro channel coil system wasn't for that I would have given you a call brother I'm in Chester co. I may swing over your way and learn some knowledge.
I really don't like the micro channel coils Some of the York units don't come with micro channel but some do Glad you got a new system hope all is well with it
Thanks for making these kind of videos. I have a 5 ton package unit that I have to install. Can I apply this knowledge to a 5 ton package system as it relates to the duct work I need for it?
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Ducted Mini splits are awesome they have a pretty good range of adjustable blower static pressure settings. I have a video on how I changed the static pressure using software
Hey Thank You so much Here is the Link Sign in and then click the join button ru-vid.com/show-UCuMyjTVlkM4xZ5z_eSyoB1wjoin Then email me at tadfuller1@gmail.com
I gave it a dislike because we should NOT assume that a 6” duct will deliver 100 CFM. Measuring air flow is essential instead of using a rule of thumb.
Many people that are just starting don't know anything. So instead of supporting somebody that is trying to help by giving them a guideline You're going to try to hurt instead of help Well I appreciate your support anyways thank you have a blessed day
There's plenty of Information out there. You're saying a lot of good stuff but your duct calculations are not based on any scientific data. What's your TEL? What makes you say that a 6" pipe will give you 100CFM? There's no such thing as " giving" if everything is done right you will get a specific amount of CFM. But there's a lot more then just 6" pipe is 100 CFM. Maybe you save that for where you can make money
@@TaddyDigest I understand. But I think it might be a bit misleading, the information on your board. You will get 100 CFM on a 6", at a specific friction rate.
To someone who knows nothing about duckwork sizing it's good information I am giving an average CFM for that 6" duck At least I'm trying to help And I'm doing the best that I can Have a blessed day my friend
Wow the guy has good content but is trying to make a dollar as opposed to just helping out people. Thats sad idk why people can't just share knowledge for free and help each other grow.
I wish I could do this for free. Do you think I want to charge? I want to do this for free. No what's sad is the fact that I have so much that I have to do during the day that I can't just set and focus on this. Do you know how many people I would help if I was to be able to just focus on this every day. I was hoping that the people that really needed the knowledge would support me so that I would then have time and have time to do a lot more. But I have a company to run and I have employees that need to feed their families so I have to do what I have to do
@@TaddyDigest Right now $ makes the world go round as is said. I feel it is an opportunity to forward "money" to someone like you Taddy who is obviously a "service to others" being as opposed to "service to self" person.
Hi I have a 2 ton unit and need a new one but want to go with a 3 ton is that something easy to do I’m almost at 1800 ft.² coverage with four different returns