SolvedDuct Cleaning
Repair or replace a 6-year-old duct system in Los Angeles?
Asked by Ruben Russellin Los Angeles, California· 3/25/2026· 889 views
I'm in Los Angeles, California and dealing with a 6-year-old duct system in our semi-detached home. Over the past week, it has been pushing weak airflow to the upstairs rooms and we're now noticing the upstairs stays noticeably worse than the main floor.
One contractor quoted $1,353 for repair, while another jumped straight to a $8,268 replacement because of the age. The weather here has been dealing us cold morning startup, so I do not want to wait too long, but I also do not want to approve the wrong scope.
If you were comparing bids on this, what would you want checked first? I especially want to know how much weight you would give to duct leakage, balancing, blower performance, and filter pressure drop.
ductsairflowcomfort
8 Answers
23
✓ Accepted Answer
From a contractor side, I would not approve a major repair or replacement without test results that line up with the symptoms. For a duct system that is pushing weak airflow to the upstairs rooms, the first things I would ask for are duct leakage, balancing, blower performance, and filter pressure drop. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Los Angeles, California, pricing can move around, but the diagnostic process should still be clear.
31
0
If this landed on my schedule, I would want to document the core readings first and then explain exactly why the repair does or does not make economic sense. For a duct system that is pushing weak airflow to the upstairs rooms, the first things I would ask for are duct leakage, balancing, blower performance, and filter pressure drop. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Los Angeles, California, pricing can move around, but the diagnostic process should still be clear.
30
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The recommendation should be tied to measurements, not just the age of the equipment. Age matters, but it is not a diagnosis on its own. For a duct system that is pushing weak airflow to the upstairs rooms, the first things I would ask for are duct leakage, balancing, blower performance, and filter pressure drop. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Los Angeles, California, pricing can move around, but the diagnostic process should still be clear.
14
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Before signing anything, I would ask the technician to show the readings and explain which number actually supports the recommendation. For a duct system that is pushing weak airflow to the upstairs rooms, the first things I would ask for are duct leakage, balancing, blower performance, and filter pressure drop. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Los Angeles, California, pricing can move around, but the diagnostic process should still be clear.
12
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We had something similar and the turning point was asking each company for the actual readings in writing instead of a verbal explanation. We had a related issue with our duct system in Los Angeles. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Olivia Patel·3/25/2026
11
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We used the directory reviews to filter out firms that were vague about what they had actually tested. That saved us a lot of time. We had a related issue with our duct system in Los Angeles. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Lucas Mitchell·3/25/2026
10
0
The recommendation should be tied to measurements, not just the age of the equipment. Age matters, but it is not a diagnosis on its own. For a duct system that is pushing weak airflow to the upstairs rooms, the first things I would ask for are duct leakage, balancing, blower performance, and filter pressure drop. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Los Angeles, California, pricing can move around, but the diagnostic process should still be clear.
10
0
Before signing anything, I would ask the technician to show the readings and explain which number actually supports the recommendation. For a duct system that is pushing weak airflow to the upstairs rooms, the first things I would ask for are duct leakage, balancing, blower performance, and filter pressure drop. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Los Angeles, California, pricing can move around, but the diagnostic process should still be clear.