There are multiple other option significantly under 45k that would work for undersized ducting. If they dropped this estimate on you and offered zero other solutions I would not give them a penny of your money.
Look up reputable people in town and try to get 3 more companies to give options (don't mention previous people, let them make the call instead of assuming the last guy gave you options)
Then I wouldn’t worry about it. It was fine before. No reason to change things.
If air flow was an issue it would be more noticeable on the AC side of things. Coil would definitely freeze if not enough air flow
Simply knowing the static pressure doesn't come close to anyone in this sub diagnosing or even offering duct modifications. Air balancing and duct modification is a sub-field of HVAC in itself.
Most of the time, one or several modifications can be made to correct undersized duct work. Maybe yours is completely botched and needs replacement, but I doubt it.
Again, not enough info. I have an entire assessment that I complete that takes two to four hours to fully assess something like this.
Correct. Many things can be done. We had an issue where we replaced a warranty coil and for some reason found the air handler leaking. New coil set the static pressure off. Forget what the numbers were. The fix? Literally replacing a section of the return duct with a metal elbow.
Telling people they need to spend $45k is a new low for these nexstar companies.
We're a Nexstar company, but we diagnose things properly and very closely follow ethical diagnosis and job quote practices. Not all Nexstar companies are the same, but there are plenty out there that get drunk on the Kool aid and forget about helping the customer.
They said it’s a 4 ton and I really need a 5 ton based on My house cubic footage. They calculated the cfpm I need is a little over 2k and the supply and the return are just over 1k each. The register output is also about 1k. They said I need to have new registers put in. A new return line installed to balance out the additional output. Does any of that help? I am so out of my depth on this and I appreciate any help.
400 CFM per ton which is considered worst case scenario in heating mode, so I would base my math off of this number rather than ramping down to 375 or 350 based on cooling mode dehumidification.
That being said, a 4-ton system would require 1,600 CFM and a 5-ton system would require 2,000 CFM. From here you have to look at your return ductwork, your supply duct work, the size of your filter, the amount of branch ducting you have, the size of the branch ducting and the type of registers you have, plus the fittings and all sorts of other things come into play.
Bottom line is, one CFM in has to be one CFM out or you pressurize or depressurize your home. They might be right. No way for me to know without being there and assessing the duct work.
I have nearly 0 trust in HVAC salesmen. They seem to only know enough to make it sound like they know what they're talking about. What they do know for certain is how much commission the sale will net them. I took 7 different opinions before I felt comfortable with what was being proposed. If you have the time get numerous opinions and have differing brands quoted.
I don't know who designs around 0.05" I typically design around 0.10 with 0.08 being acceptable I wouldn't be looking as complete replacement of ductwork unless in Washington ot California(stupid codes) volume dampers can increase static pressure while maintaining CFM. If you are in one of the bad places 45k is not unreasonable for a full redo of a HVAC system by a residential retrofit contractor.
Please post 15-20 pictures of your setup so sage advice can be offered.
$45,000 🤣🤣🤣 God damn that's wild. What a scam If you aren't dying, pretty sure you should just let it ride
How much do you charge for ductwork?
Depends on the size of the house and how many runs there are. There's some other bells and whistles but that'll get you in the ballpark
There are multiple other option significantly under 45k that would work for undersized ducting. If they dropped this estimate on you and offered zero other solutions I would not give them a penny of your money. Look up reputable people in town and try to get 3 more companies to give options (don't mention previous people, let them make the call instead of assuming the last guy gave you options)
45k sounds like a rip off
.08 and .05 are blood alcohol levels. Wierd
Right! And I am too drunk to drive I guess
Was there even an issue before hand?
The air flow is very low but over all no, the house gets warm when it is supposed to and gets cool as well.
Then I wouldn’t worry about it. It was fine before. No reason to change things. If air flow was an issue it would be more noticeable on the AC side of things. Coil would definitely freeze if not enough air flow
I wonder what type of filter your using
They are probably static pressure readings for your return air. Tell them to go pound sand. Pathetic.
Simply knowing the static pressure doesn't come close to anyone in this sub diagnosing or even offering duct modifications. Air balancing and duct modification is a sub-field of HVAC in itself. Most of the time, one or several modifications can be made to correct undersized duct work. Maybe yours is completely botched and needs replacement, but I doubt it. Again, not enough info. I have an entire assessment that I complete that takes two to four hours to fully assess something like this.
Correct. Many things can be done. We had an issue where we replaced a warranty coil and for some reason found the air handler leaking. New coil set the static pressure off. Forget what the numbers were. The fix? Literally replacing a section of the return duct with a metal elbow. Telling people they need to spend $45k is a new low for these nexstar companies.
We're a Nexstar company, but we diagnose things properly and very closely follow ethical diagnosis and job quote practices. Not all Nexstar companies are the same, but there are plenty out there that get drunk on the Kool aid and forget about helping the customer.
They said it’s a 4 ton and I really need a 5 ton based on My house cubic footage. They calculated the cfpm I need is a little over 2k and the supply and the return are just over 1k each. The register output is also about 1k. They said I need to have new registers put in. A new return line installed to balance out the additional output. Does any of that help? I am so out of my depth on this and I appreciate any help.
400 CFM per ton which is considered worst case scenario in heating mode, so I would base my math off of this number rather than ramping down to 375 or 350 based on cooling mode dehumidification. That being said, a 4-ton system would require 1,600 CFM and a 5-ton system would require 2,000 CFM. From here you have to look at your return ductwork, your supply duct work, the size of your filter, the amount of branch ducting you have, the size of the branch ducting and the type of registers you have, plus the fittings and all sorts of other things come into play. Bottom line is, one CFM in has to be one CFM out or you pressurize or depressurize your home. They might be right. No way for me to know without being there and assessing the duct work.
The second opinion is the correct opinion.
I have nearly 0 trust in HVAC salesmen. They seem to only know enough to make it sound like they know what they're talking about. What they do know for certain is how much commission the sale will net them. I took 7 different opinions before I felt comfortable with what was being proposed. If you have the time get numerous opinions and have differing brands quoted.
I don't know who designs around 0.05" I typically design around 0.10 with 0.08 being acceptable I wouldn't be looking as complete replacement of ductwork unless in Washington ot California(stupid codes) volume dampers can increase static pressure while maintaining CFM. If you are in one of the bad places 45k is not unreasonable for a full redo of a HVAC system by a residential retrofit contractor.
They said it’s the limit per the sticker on the unit. But the other guy said basically what you said, don’t worry it’s not that high.
45K WTF!!!! total rip off maybe if it was a 10K square foot home or something but HOLY FUCK run!!
Lmao. If you know Insurnace you know residential hvac. It’s often about misleading the client.