How to understand what is needed cleaning for HVAC air ducts?
To understand that it was time to clean the air duct - it is not necessary to peel into it regularly.
There are several signs for which you can determine that the system requires cleaning:
The room has become stuffy and hot if other conditions (weather, operation of ventilation and climatic devices) - did not change.
Dust on the floor and furniture accumulates very quickly.
A web is accumulated on the ventilation grille and around it (both exhaust and supply).
Drafts that previously occurred when opening windows or doors, now have become weaker, or in general disappeared.
In addition to the above "accept", there is a practical way to verify the performance of the ventilation mines:
Ventilation channel performance
Remove the ventilation grid from the outstand.
Rinse the grille.
Install the grille into place. If the grille is not too dirty - the first 2 points can be skipped.
Open the window or window.
To the ventilation grid, apply a sheet of paper. If it is "attracted" to the lattice - it means that there is a traction, and the thrust is good. Please note: dense paper is not suitable, because even a good traction will not always be able to "attract" a heavy sheet. It is better to use half a notebook, a piece of toilet paper or a loaf of a newspaper.
How to check the condition of the duct and determine the degree of pollution?
If you notice the "symptoms" listed above - it's time to check the condition of the duct.
This is done visually: the inner surface of the ventilation channels is inspected, and the number of deposits is determined.
You can carry out inspection in such ways:
Sitter duct
Through a special hole - hatch. Looking hatch in the ventsystems should be designed when laying air ducts. However, the hatches are usually far from each other, so they allow us to examine only a small part of the system.
After removing the ventilation grille (especially relevant, if there is no observation hatch). This option of inspection allows you to see a small part of the air duct, but does not require special equipment. Actually, if you want to check the status, and the hatch in the system is not (or it is, but in another part of the system).
Remotely, with the help of special video equipment. This option allows you to estimate any, even the most narrow or complex geometrically section of the duct.
If the inspection is carried out by experts - they have an equipment for the video inspection. This may be an endoscope with a camera and illumination that transmits video to the screen, allowing you to evaluate all parts of the ventsystem.
