El Carmen
El Carmen: house with additions, do the ducts cover them well?
The original living room cools wonderfully and the new room at the back never does. The explanation is almost always in how the duct was stretched to reach it.
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In an El Carmen house with additions, the added room usually cools worse because its branch was solved by lengthening the existing duct, with long runs, tight bends, stretched flexible duct and, almost always, no return of its own. The camera inspection shows the splice, the state of the joints and the dust built up, and from that it is decided whether adjusting is enough or work is needed.
Houses in El Carmen have been growing for decades. A bedroom was added for the children, a terrace was closed to make a study, a second floor went up or an apartment was attached at the back of the lot. Each addition was thought of at the time as a matter of masonry and electricity, and the air conditioning was solved last, with whatever was at hand.
The result shows in any walk through: a room with the supply grille blowing weakly, the door shut so it cools and a temperature that never matches the thermostat. The owner blames the unit, calls a technician, replaces a part and the room stays the same. In those cases the unit is usually fine. What is not fine is the path of the air.
Why does the air not spread evenly into additions?
An addition is almost always solved by lengthening the existing duct or adding a branch, not by redesigning the system. That practical decision leaves long runs, bends, stretched flexible duct sections and grilles in rooms with no return of their own. The longer and more twisted the path, the more air is lost along the way and the less arrives at the end.
The fieldwork is carried out by the Climatiza team, who check branches, grilles and air handlers and record the result in an illustrated report, also in the case of El Carmen.
A field study of 31 California homes estimated that distribution system efficiency ranges between 50 and 95 percent depending on conditions, and that the return location weighed heavily in the cooling season. It is not Panamanian data, but it leaves a useful idea: what decides distribution in an extended house is the design of the path, and the camera shows that better than the look of the grilles.
What does the camera show in the section that was added?
The camera does not measure how much air arrives, and it is better not to ask it to. What it does is show where the splice was made, what state the joint is in and how much dust built up in the new section compared with the original. That comparison between the old branch and the added one explains much of what the owner feels in the room.
- Splice of the new branch with the original duct: sealed or only taped.
- Flexible duct with long runs, squeezed or with tight bends.
- New room with a supply grille and no return, door shut most of the time.
- Branch hidden in the false ceiling with no access point.
- Visible dust difference between the original branch and the added one.
Why does it matter to fix it if the house already works?
It matters for comfort, which is the first thing the people living there notice. A room that does not cool pushes the thermostat down for the whole house, and the rooms that were already fine end up cold to make up for the one that is not. The unit runs more hours than it needs to and the electricity bill approaches what whoever lives there already suspects.
It also matters for the state of the system. A badly sealed splice in the attic or false ceiling lets cold air escape into a space that does not get cooled, and the condensation that forms there wets the insulation. And it matters in a sale or a rental, because a report with photos says which part is original and which was added, something careful buyers ask about. It is worth saying that duct cleaning has not been shown to prevent health problems, according to the EPA. Here it is proposed only when there is loaded dust or visible damage in a section.
What does a visit to an extended house look like?
It starts with a walk through the house and the attic to tell original rooms from new ones and to locate the air handler and the exit point of each branch. Then the unit that feeds the whole house is looked at, with its coil, its pan and its filters. Only then does the camera go in, running first the original branch and then the added one to compare dust deposits, joints and bends. In the new rooms it is noted which have a return of their own and which depend on the door staying open.
An illustrative case, not a real client: a house with a room added years ago. The original branch is clean and matte. The added one, spliced with tape and with a stretched flexible run in the false ceiling, shows stuck dust in the bends and an open joint. The report groups findings by room: in the new one, seal the splice and gather up the flexible duct, and in the rest, nothing. Cleaning is proposed only for that section.
Which mistakes repeat and what is worth asking for?
The most common mistake is blaming the unit and replacing it, or raising its capacity, without having looked at the path. The second is closing the door of the new room so it cools, which cuts off the return it does not have and worsens distribution. The third is cleaning the entire system without telling the branch that needs it from the one that does not.
What is worth asking for is a report by room, with numbered photos of the splice and of each section, a note of which rooms have no return and one clear recommendation per finding. The system design, if it needs to change, belongs to an air conditioning technician. The camera run in the duct supplies the evidence for that conversation. How a visit is organized in the neighborhood is summed up in the work in El Carmen, the other zones are in the zones where the team works and the criteria for deciding when to clean are set out in when cleaning is due and when it is not.
For a first conversation about the system, the contact details are on the Climatiza site and the method is described on its duct cleaning service page.
Sources
On this site
- Residential towers and PH buildingsHow the work is organized in this sector
- El CarmenThe area and its building types
- Camera inspectionThe real condition before deciding
Climatiza and Radar Panamá
Why does inspecting and cleaning ducts matter?
These are the technical reasons, with their source, why the condition of the ducts is checked before deciding. Duct cleaning has not been shown to prevent health problems according to the EPA and the CDC, and it is proposed only when the observed condition justifies it.
| Advantage | Data with source | What it means in practice |
|---|---|---|
| Follow a technical inspection reference | The ANSI/ASHRAE/ACCA 180 standard is the standard practice for inspection and maintenance of commercial HVAC systems. | It is an industry reference, not a legal requirement in Panama, and helps organize the review plan. |
| Require method and a report from the provider | NADCA published in 2025 the current edition of its ACR standard on assessment, cleaning and restoration of air systems. | It is an industry reference and not a seal: it helps ask for method, photographs and scope in writing. |
| Anticipate the tropical humidity | According to ETESA (Tocumen station, 1977 to 2010), mean annual relative humidity in Panama is 75.7 % and rises to between 78.2 and 82.4 % in the rainy months. | The condensate pan, the drain and the coil are checked first, because that is where moisture builds up. |
| Keep construction dust out of the system | The EPA and NIOSH Building Air Quality guide asks to block return grilles while construction work takes place in occupied buildings. | Before accepting a new or remodeled system it is worth checking whether construction dust got in. |
Frequently asked questions
Why does the new room in my house not cool like the others?
Almost always because its branch was solved by lengthening the existing duct, with long runs, tight bends or stretched flexible duct, and no return of its own. The camera shows the splice and the state of the section to know whether adjusting is enough or the path needs correcting.
Does the camera measure how much air reaches each room?
No. The camera shows the inside of the duct: joints, bends, splices and dust. Airflow is measured by an air conditioning technician with their own instruments, and the camera report serves as evidence for that measurement.
Do all the ducts of a house with additions need cleaning?
No. The section where the camera shows loaded dust, residue or visible damage is cleaned and the rest is left. Often the original branch is clean and the new room’s problem is the splice or the return, not the dust.
Why does it matter that a new room in an extension has its own return?
Because air distribution depends on the path and the return, not on how the grille looks. Modera (1993, Energy and Buildings) estimated in California homes that distribution efficiency ranges between 50 and 95 percent, and that the return location strongly influenced the cooling season.
What signs show that the duct of an extension was badly joined?
A joint sealed only with tape, flexible duct that is squeezed or has tight bends, a branch hidden in the false ceiling without an access panel, and a visible difference in dust between the original branch and the added one. The camera runs through both branches and puts those images in the report.
Keep reading the guide
Request an inspection
Do you want to know the condition of your system?
A camera inspection lets you see the inside of the ducts before deciding what to do. Message us and we will confirm availability.
- +507 6388-2083
- info@climatizapanama.com
- Calle Gervasio García, 8, Panama City