Air change calculation
By occupancy, by floor area and by room function — whichever gives the higher figure. A bedroom, a kitchen and a meeting room each need something different; one number for the whole building always short-changes someone.
Home/Ventilation
◆Service 02 · Ventilation
Turnkey ventilation — from the air change calculation to balancing
We calculate the air change room by room, design the network, install the unit and the ductwork, measure the flows and service the system.
What the work covers
six parts, one responsibilityNetwork design
Routing, diameters, aerodynamic calculation, penetration details. With that drawing the installation does not run into a beam halfway along the route.
Supply and extract unit
Selected on flow and pressure with headroom for filter loading. Heat exchanger, heater, filtration, controls.
Ductwork
Galvanised steel or plastic, silencers, anti-vibration connections, insulation wherever condensation forms. Concealed above the ceiling with access hatches.
Air distribution
Grilles and diffusers placed so nothing blows on the back of your neck. Outlet velocity kept below the point where the airflow becomes audible.
Balancing and service
Flow measured on every branch, regulators set, a filter replacement schedule. Without measurement, ventilation does not run the way the drawing says.
Why heat recovery pays for itself in Tashkent
forty-two in summer, minus ten in winterTashkent means +42 in summer and around −10 in winter. A supply unit without heat recovery carries that whole difference on its heater and on the air conditioner — which is to say, on the electricity bill.
A heat exchanger takes the heat out of the air you are throwing away anyway and gives it to the incoming air. In winter the supply arrives at around +16 rather than −10, so there is almost nothing left to heat.
In summer it works the same way in reverse: hot outdoor air gives up part of its heat to the extract and arrives already cooled, taking load off the air conditioning.
The second argument is dust. Indoor dust comes in through the open window. A supply unit with a filter closes that window for good: fresh air, no dust.
Equipment
we are the official representative of these brands in Uzbekistan| Element | What we install |
|---|---|
| Supply and extract units with heat recovery | Zehnder |
| Fan convectors and air curtains | Kampmann |
| Ductwork and fittings | fabricated to the design |
| Grilles, diffusers, flow regulators | selected for the distribution |
| Silencers and anti-vibration | to the acoustic calculation |
| Controls and thermostats | ENGO |
How the job runs
from the first call to handover- 01Enquiry and site visitWe look at the building, the ceiling void available, and listen to the brief.1–2 days
- 02Calculation and proposalAir change rates, unit selection, an itemised quotation.3–5 days
- 03DesignRouting, diameters, aerodynamics, details. Agreed and frozen.5–10 days
- 04Supply and installationUnit, ductwork, silencers, terminals. Concealed work recorded as it goes.from 2 weeks
- 05Balancing and handoverFlow measurement, regulators set, operator briefing, service schedule.2–3 days
Where it already runs
residential complexes and buildings across Tashkent and the region
Questions people ask before the calculation
short and to the pointCan ventilation be added to a finished apartment?
Yes. A ducted unit hides above the ceiling in the hallway and bathrooms — that costs 20–25 cm of height there, while the living rooms keep their ceiling.
Where there is no height at all, we use single-room supply units, one per room, discharging through the wall.
Is a supply unit noisy?
What you usually hear is not the unit but the velocity in the ducts. Undersize the cross-section to save money and the air whistles at the grilles — and that cannot be fixed afterwards.
We keep velocities sensible, fit silencers downstream of the unit and isolate it from the structure with anti-vibration connections.
Is heat recovery essential, or is extract enough?
Extract on its own puts the apartment under negative pressure, and air arrives from places nobody invited it from: the stairwell, the neighbour’s bathroom, the shaft.
Supply has to be organised. In that scheme heat recovery is not a luxury; it is how you avoid paying to heat the street.
How often do filters need changing?
In Tashkent, more often than the manufacturer states, because of the dust. Take 3–6 months as the reference for the supply filter.
Better to watch the pressure drop than the calendar: a unit with a sensor will tell you itself when the filter is loaded.
Are ventilation and air conditioning the same thing?
No. An air conditioner recirculates the same air and changes its temperature. It adds no freshness.
Ventilation replaces the air. Stuffiness in a room with the air conditioner running is exactly that difference.
Let us calculate the air change for your building
Send the plan and what each room is for — we will come back with the calculation and a unit selection. It is free and commits you to nothing.