Question 1

What is heat-recovery ventilation?

Accepted Answer

It is a mechanical ventilation system in which the warm exhaust air heats the incoming fresh outside air through a heat exchanger. It saves up to 90% of the heating energy needed for air exchange.

Question 2

Why does a modern home need mechanical ventilation?

Accepted Answer

Modern homes are built airtight. Without mechanical ventilation the building collects humidity, CO₂ and pollutants — leading to mould, stale air and an uncomfortable indoor climate.

Question 3

Do you offer a free consultation?

Accepted Answer

Yes, the initial consultation over the phone is free. An on-site visit is normally arranged before work starts.

Question 4

How quickly do you reply to a quote request?

Accepted Answer

We send the initial response within 24 hours. A detailed quote following the on-site visit reaches you within 3–7 business days.

Question 5

Do you serve all of Estonia?

Accepted Answer

Yes — we serve the entire country.

Question 6

How long does installation take?

Accepted Answer

A per-apartment unit — 1–3 working days. A full house system — 4–7 working days. An apartment building or commercial site — weeks depending on the project.

Question 7

Can it be installed in an existing building?

Accepted Answer

Yes, we offer renovation solutions. We use flexible ducts.

Question 8

Do you produce the project documentation?

Accepted Answer

Yes, we can deliver the design project. After installation we also issue a commissioning report that can be submitted to the local municipality.

Question 9

Do you also install other suppliers' equipment?

Accepted Answer

Yes, but we recommend our partner brands (Komfovent, Vallox, Flexit, Systemair, Zehnder, Airobot) — we can offer the best warranty terms on those.

Question 10

How often does the unit need servicing?

Accepted Answer

Filter replacement every 6–12 months. Heat-exchanger cleaning and a full check once a year.

Question 11

Do you offer maintenance contracts?

Accepted Answer

Yes, from €79 per year (compact units) up to €295 (larger units over 750 m³/h). Includes filter replacement, heat-exchanger cleaning and technical inspection.

Question 12

How often should ducts be cleaned?

Accepted Answer

Houses — every 3 years; commercial buildings — every 1–2 years. Catering facilities — every six months (grease ducts).

Question 13

Do you do duct video inspections?

Accepted Answer

Yes, we provide video inspection — you get visual proof of the condition before and after cleaning.

Question 14

Can I replace the filters myself?

Accepted Answer

Filters are usually easy to access from the front.

Question 15

Which brand should I choose?

Accepted Answer

It depends on the client's requirements and needs.

Question 16

What is the best heat-recovery efficiency?

Accepted Answer

Top solutions (Zehnder ComfoAir Q) reach 95%. Most quality units fall in the 80–90% range.

Question 17

Can it integrate with home automation?

Accepted Answer

Yes — KNX, Loxone, Home Assistant, Apple HomeKit (Vallox). Komfovent C6, Vallox MV, and Systemair support Modbus / WiFi.

Question 18

What is an enthalpy exchanger?

Accepted Answer

It's a heat exchanger with humidity recovery — it keeps a comfortable indoor climate in winter and stops the air from getting too dry.

Question 19

Will the same unit work for a summer house?

Accepted Answer

For a summer house we recommend the Vallox MV or Flexit Nordic — they have good frost protection and tolerate longer idle periods.

Question 20

What does installing house ventilation cost?

Accepted Answer

A typical 150–250 m² house comes in at €5,500 – €9,000 (unit + installation + ductwork).

Question 21

What does apartment ventilation cost?

Accepted Answer

A per-apartment heat-recovery unit from €2,200 (installed).

Question 22

Is VAT added to the price?

Accepted Answer

Yes — 24% VAT is added to all prices.

Question 23

Do you offer financing?

Accepted Answer

Contact us and we will find a suitable solution.

Question 24

Is the on-site visit free?

Accepted Answer

Usually yes in Tallinn and Harju County. Further away, after the contract is signed.

Question 25

How long is the equipment warranty?

Accepted Answer

Factory warranty 2–7 years (depending on the brand).

Question 26

What is the installation warranty?

Accepted Answer

We give a 2-year warranty on installation work.

Question 27

Does the warranty apply without a maintenance contract?

Accepted Answer

The factory warranty applies but requires regular filter changes. A maintenance contract often extends the warranty period.

Question 28

Where can I get help if there's a problem?

Accepted Answer

Call +372 588 22 446 or write info@koduvent.ee. In emergencies in Tallinn we can respond the same day.

Question 29

Do you offer remote control?

Accepted Answer

Yes, all modern units support WiFi control and a mobile app (iOS, Android).

Frequently Asked Questions

General questions

Installation

Maintenance and cleaning

Equipment and brands

Pricing

Warranty and support

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