The Ventall calculator is an engineering calculator for a preliminary online estimate of typical properties from 51 to 450 m². It helps quickly understand the budget range and gives a reference point, not a formal quote. Properties outside the typical scenario require a different work format.
Read the full article about the Ventall calculatorFAQ
Answers about timelines, budgets, warranties, and service.
To avoid guesswork, start with our engineering pricing calculator. It provides a near-real estimate and shows what is included in your price.
How we deliver turnkey:
One integrated scope: design, installation, commissioning, and service. Full service structure is available on the services page.
Every property is unique: purpose, location, occupancy, noise limits, budget, and owner expectations. Base requirements are air exchange, temperature, and humidity.
How we select:
First we define your goal: regulations compliance or comfort and health. Then we calculate baseline parameters and provide 2-3 realistic options with clear trade-offs by budget, noise, efficiency, and service.
Short answer: no, if by “fresh” you mean oxygen and outdoor air supply. Many people confuse cooling with ventilation. How it actually works: • Recirculation: a standard split AC works like a “fridge for the room”. It takes indoor air, cools/heats it, filters it, and returns it back. Outdoor air does not enter the room. • CO2 level: without outdoor air supply, CO2 rises in a closed room even if the temperature feels comfortable. • The pipe myth: pipes between units carry refrigerant, not outdoor air. AC vs ventilation: • Cooling: AC — yes (effective), ventilation — no or minimal. • Outdoor air supply: AC — no, ventilation — yes. • CO2 removal: AC — no, ventilation — yes. • Air cleaning: AC — basic dust filtering, ventilation — filtration of supplied air. Tip: for a stable indoor climate, AC and ventilation should work together. If budget is limited, you can consider systems with fresh-air mixing, but they are usually less effective than full ventilation.
Typical sequence: audit, concept, approval, production preparation, installation, commissioning. For apartments and houses this is commonly several weeks, depending on readiness and scope.
We provide warranty terms for installed works and supplied equipment, plus maintenance schedules: filter replacement, diagnostics, seasonal service, and support.
Yes, with correct design: air velocity limits, silencers, proper duct geometry, and balancing at commissioning.
In finished spaces it is possible only in selected scenarios. The best result is achieved when routing and service access are planned before finishing works.
Consumption depends on selected equipment, operation mode, and automation settings. We estimate operating scenarios before implementation.
You receive project materials, specifications, equipment passports, warranty documents, and commissioning/service recommendations.
Yes. We review existing documentation, identify risks, and propose adjustments before implementation.
The main factors are airflow rate, ductwork volume, installation conditions, automation level, and commissioning scope.
Yes. We optimize configuration in steps and keep critical comfort and reliability functions unchanged.
Yes. Ventilation and cooling can be implemented separately according to your current needs and budget.
Yes. We provide project documentation as a separate service with technical clarifications for contractors.
Yes, after technical verification of compatibility, condition, and warranty implications.
Yes. We diagnose root causes, provide a repair plan, and restore stable operation.
Yes. We audit existing installation, identify risks, and propose phased correction.
Yes. We review current capacity, rebalance airflow, and upgrade weak points if needed.
Yes. This is one of our core solutions for controlled fresh air and energy efficiency.
Yes. We implement both standalone and combined ventilation scenarios.
We evaluate each project individually. The decision depends on technical complexity and current production load.
We select wall, ducted, cassette, multi-split, or VRF based on layout, comfort goals, and budget.
We work with proven brands and offer options in several budget tiers with clear trade-offs.
Ducted systems are more integrated into interiors, while wall units are usually faster and cheaper to install.
VRF gives more flexibility and scaling for larger objects, while multi-split is often simpler for smaller projects.
Ducted systems are typically more expensive due to ductwork and installation complexity. Final cost is calculated after layout review.
Can't distinguish brands, systems, configurations. Afraid of being sold unnecessary extras. Can't verify the solution myself.
How we solve it:
We explain each system element in simple terms. Show alternatives and analogues. Provide detailed specifications with explanations.
Ventilation is built into the house. Rework = destroy the renovation. System replacement is almost impossible.
How we solve it:
We design the system before renovation starts. Coordinate with your designer and builders. Reserve technical options for future changes.
Air is not a 'visible' product. Hard to feel the difference immediately. Effect is explained with numbers, not sensations.
How we solve it:
We show real cases with reviews. Explain what will change: sleep, no stuffiness, less dust. Guarantee results in the contract.
Kids, sleep, allergies, humidity. Fear of making it worse (noise, drafts, cold). Fear of hidden problems in 1-2 years.
How we solve it:
We design considering noise and comfort. Use proven equipment. Provide warranty on work and equipment.
Who will service it? Will the company disappear? Dependence on one contractor.
How we solve it:
9 years in the market, 1000+ systems. Own service department. Maintenance contract with fixed terms.
Ventilation unit
Heart of the system — provides fresh air supply and exhaust. Often with heat recovery for savings.
Ductwork
Galvanized ducts through which air moves between the unit and rooms. Sealed connections.
Grilles and diffusers
Visible interior elements — air enters/exits through them. Can be adjustable.
Air conditioner
Air cooling/heating. Ducted (concealed) or wall-mounted (visible) — depends on the project.
Automation
System control: CO₂ sensors, humidity, timers, WiFi remote. Comfort without extra actions.
More system elements
Open the article with the full list and explanations.
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Yes. We can phase implementation if key routes and technical points are reserved from the start.
A dedicated niche or technical area with service clearance is required. Exact size depends on selected unit.
Usually every 3-6 months depending on air quality and operating mode. Annual budget depends on filter class and service scope.
Yes, in most scenarios. Integration depends on control interfaces and protocols of chosen equipment.
Start at design stage before finishing works. Typical order: design, rough-in routes, finishing, equipment install, commissioning.
Engineering consultation
Describe the site or task. We will suggest the right ventilation and air-conditioning solution.