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Most Nixa homeowners call about ducts for one of three reasons. One room never gets warm. The bills keep climbing. Or the heating system runs constantly and the house still is not comfortable.
Almost none of those are dirt.
They are air going somewhere other than your rooms, or air that cannot get through at all. Cleaning a duct that leaks into the crawl space leaves you with a clean duct that still leaks into the crawl space. The dust comes back and the complaint never moves.
So before you spend anything, it is worth knowing which problem you have. That takes a measurement, not a guess, and the measurement takes a technician with a manometer rather than a flashlight.
For duct repair and replacement in Nixa call (417) 356-4048.
Your duct system is under pressure whenever the blower runs. Supply ducts push, return ducts pull, and every seam, joint and connection is a place where that pressure finds a way out or lets unconditioned air in.
The leaks that cost you the most are the ones in the places you never go:
Air that leaks into an attic or a crawl space was heated or cooled with fuel you paid for, and it never reached a room. That is the loss, and it runs every hour the system runs.
Leakage sends air to the wrong place. Restriction stops it moving at all, and the symptoms overlap enough that they get confused constantly.
A blower is built to move a certain volume of air against a certain resistance. Push that resistance up and it moves less air, works harder, and runs hotter. Common causes:
High resistance also shortens equipment life. A furnace that cannot move enough air across its heat exchanger runs hotter than designed, and a cooling coil with too little airflow runs colder than designed and can freeze.
Static pressure, measured across the air handler with a manometer. It takes a few minutes, and it is the difference between a diagnosis and an opinion.
Equipment carries a rating for the resistance it was designed to work against. Measure what the installed system is actually seeing and compare the two. If it reads high, the problem is on the duct side and no amount of work on the equipment will fix it. If it reads normal and a room is still cold, you are looking at a leak, a disconnection or a balancing problem rather than a restriction.
Two numbers, one visit, and it tells you which of the two problems you are paying to solve. Ask for them. A quote with no static pressure reading on it was written without knowing what is wrong.
Most systems need repair. Replacement is for systems with a fault you cannot seal your way out of.
Repair makes sense when the ducts are sound metal or serviceable flex in the right sizes, and the problems are specific: a few failed joints, a disconnected run, unsealed boots, a missing damper, one crushed section. Sealing and reconnecting is targeted work with a measurable result, and the static pressure reading before and after proves it.
Replacement or redesign makes sense when the system itself is wrong rather than damaged:
You rarely replace all of it. The usual answer is the trunk and returns rebuilt properly and the sound branch runs kept.
Where the ducts are reachable, sealing is done by hand at the joints with mastic and mesh. Mastic is a brushed-on compound that stays flexible and keeps working as metal expands and contracts. It outlasts tape by a wide margin, and that is the whole reason to use it.
The one thing to know: foil tape is acceptable and cloth duct tape is not. Despite the name, cloth duct tape dries, loses grip and falls off, and a joint sealed with it will be open again.
Where the ducts are buried in walls or under a slab and cannot be reached, interior sealing methods exist that work from inside the duct. They are worth knowing about when access is the real obstacle, and they are the exception rather than the starting point.
Nixa is a mix, and the duct faults follow the building era rather than the address.
Whichever one you have, the first visit is the same. Read the static pressure, then go and look at the ducts where they live.
Worth saying plainly, because duct work gets treated as a winter problem. The same ducts carry your air conditioning in July, and restriction hurts the cooling side harder.
An air conditioner relies on a specific volume of air crossing its indoor coil. Starve that airflow and the coil runs colder than designed, which drops capacity and can freeze the coil outright. People read that as a failing air conditioner and replace equipment that was never the problem.
A ductless system sidesteps the ductwork entirely, which is one reason it suits additions and converted spaces. For the rest of the house, fixing the ducts improves both seasons at once, and it is the only part of an HVAC system that does.
So if your complaint is summer cooling and someone has quoted you a new air conditioner without measuring static pressure, get the reading before you spend.
A duct carrying cool air through a humid crawl space will sweat if its insulation has failed. The water has to go somewhere, and it goes into the insulation, the duct itself and the framing around it. Over time the insulation packs down, the duct corrodes from the outside, and you get a smell in the house that gets blamed on the vents.
That is a real failure mode in this area, where crawl spaces are common and summer humidity is high. It is also one of the clearer arguments for replacement rather than repair, because wet, compressed insulation does not recover and a corroding duct does not get better.
If the complaint includes a musty smell when the system starts, the duct is worth opening up rather than cleaning.
You should be able to check the result, not just take someone’s word for it.
If the cold room is warm and the numbers moved, the work did something. If the ducts are clean and the room is still cold, it did not.
What is the difference between duct cleaning and duct repair in Nixa?
Cleaning removes dust and debris from inside the ducts. Repair fixes the ducts themselves: sealing leaking joints, reconnecting runs that have come apart, replacing crushed or torn sections and insulating what runs through an attic or crawl space. If a room is cold, the bills are rising or the system runs constantly, that is almost always a leak or a restriction, and cleaning will not change it. Our duct cleaning page covers the other job.
How do I know if my ducts are leaking?
The usual signs are one room that never reaches temperature, dust that returns quickly after cleaning, rooms that are much hotter or colder than the rest, a system that runs nearly all the time, and bills that climb without a change in habits. A musty smell when the blower starts points at a return leak or wet insulation. The way to confirm it is a static pressure reading plus a look at the ducts in the attic or crawl space.
Should I close the vents in rooms I do not use?
No. It feels like it should save money and it does the opposite. Closing registers raises pressure inside the duct system, which pushes more air out through every leak and makes the blower work against more resistance. If some rooms genuinely need less air, that is a balancing job done with dampers, not with closed registers.
Can leaking ducts raise my heating bill?
Yes. Air that escapes into an attic, crawl space or wall cavity was heated with fuel you paid for and never reached a room, so the system runs longer to get the house to temperature. A leaking return makes it worse by pulling unconditioned air in and asking the equipment to condition it twice.
Do I need to replace all my ductwork or can it be repaired?
Most systems need repair, not replacement. Repair is right when the ducts are the correct sizes and in serviceable condition with specific faults: failed joints, a disconnected run, unsealed boots, one crushed section. Replacement is right when the design itself is wrong, such as returns too small for the equipment, framing cavities used as returns, or flex that has gone brittle along most of its length. Even then it is usually the trunk and returns rebuilt and the sound branches kept.
Is duct tape the right thing to seal a duct with?
Cloth duct tape is not, despite the name. It dries out, loses its grip and falls off, so the joint ends up open again. Accessible joints should be sealed with mastic, a brushed-on compound that stays flexible as the metal expands and contracts. Foil tape is acceptable in places where mastic is impractical.
A duct visit should end with two static pressure numbers, a list of what is leaking and where, and a scope that says what gets sealed, what gets replaced and what gets left alone. That is the version you can compare and check afterward.
Call (417) 356-4048 and we will measure before we quote.
(417) 356-4048
Open 24 hours, 7 days a week, including holidays.
Two tune-ups a year on every system you own, 10% off all repairs and priority scheduling, from $14 a month.
Approved financing spreads the cost of a replacement, so the timing of the work is your decision rather than the equipment’s.
A heating or cooling problem leaves you guessing at both the cause and the price. The diagnosis comes with the readings behind it and the quote comes in writing, itemized, before any work starts. Call (417) 356-4048.
See Nixa heating and cooling service as a whole because duct work and equipment are measured together.