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Air ventilation Hyvinkää
The railway town’s air ventilation specialist
IVAeris serves properties in Hyvinkää with air ventilation inspections, maintenance, cleaning, and renovation. Hyvinkää is a city of around 47,000 residents in northern Uusimaa, about 50 km from Helsinki. The city was granted town privileges in 1960 and has grown from a station village built around Finland’s first railway connection (Helsinki–Hämeenlinna, 1861) into an industrial and residential city. Hyvinkää is included in STUK’s radon risk areas, and the city’s building ordinance requires that both radon and arsenic are taken into account in air ventilation design.
Hyvinkää’s building stock and air ventilation challenges
Hyvinkää’s growth has followed the rhythm of the railway network and industry, which is directly reflected in the air ventilation systems of its building stock.
The era of railways and industry (–1950s). Hyvinkää’s station village emerged along the Helsinki–Hämeenlinna railway line opened in 1861—the first railway section in Finland. The Hanko railway branches off from Hyvinkää, and the station is one of the few original stations still in use. In the 1880s, Helsinki doctors opened a sanatorium in Hyvinkää’s pine forests, and in 1892 a wool mill (Hyvinge Yllespinneri) was founded. The building stock from this era—wooden houses, sanatorium buildings, factory buildings—is equipped with natural (gravity) air ventilation and requires special attention to make-up air management.
The era of urbanization (1960s–1980s). City status was achieved in 1960, and the post-war resettlement of Karelian evacuees had already increased the population significantly. The detached houses from the late 1950s and early 1960s in the city center, together with the four-storey apartment buildings from the 1960s–1970s, form the city’s densest building stock. The Vehkoja detached-house area was built in the 1970s–1980s. In these buildings, the air ventilation is typically mechanical exhaust ventilation—a system that creates negative pressure and is the most problematic from a radon concentration perspective.
Modern Hyvinkää (1990s–). In the city’s public buildings, mechanical supply and exhaust air ventilation with heat recovery has been the standard since the mid-1990s. The Metsäkalteva and Nummenmäki areas are among the city’s main growth areas. Hyvinkää building control’s guideline for an energy-efficient detached house states that a new residential building needs mechanical supply and exhaust air ventilation with heat recovery, and low-energy and passive houses are designed to be about 5% under negative pressure.
Typical air ventilation problems in Hyvinkää
Hyvinkää’s issue profile combines the aging of a railway town’s diverse building stock, pressure balance challenges in a radon-risk area, and the city’s active indoor-air work.
Negative pressure + leaky structures = transport of contaminants. The condition assessment of Kytäjä Manor describes a mechanism that also recurs more broadly in Hyvinkää’s older building stock: negative-pressure ventilation can cause problems in structures that are not airtight—air passes through the structures and brings contaminants into indoor air. This risk chain is particularly significant in a radon area: negative pressure draws radon-laden air not only from structures but also from the soil into indoor spaces. In the same property, the basement air was described as “very stuffy.”
Ventilation converted to continuous operation for indoor-air reasons. The City of Hyvinkää has made the ventilation in its properties more continuously operated for indoor-air reasons since 2019. This is visible in energy consumption—heat consumption increased—but it has improved indoor air quality. In 2020, the city introduced ventilation guidelines based on a recommendation from an indoor-air network. This development shows that Hyvinkää has recognized the risks of intermittent ventilation and shifted to continuous operation.
Ventilation maintenance backlog in the rental-housing stock. In 2023, Hyvinkään Vuokra-asunnot Oy carried out duct cleaning and airflow balancing measures in eight properties. This indicates a systematic maintenance cycle—but also that maintenance backlog accumulates in the rental-housing stock and there is an ongoing need for cleaning.
Need to replace ventilation units in school properties. In the condition assessment of Asema School (2018), replacement of the oldest ventilation units is recommended—but before replacement, a ventilation condition assessment must be carried out. In addition, duct cleaning and airflow balancing are recommended. This “condition assessment → replacement” pathway is a documented practice in Hyvinkää’s public buildings.
Radon and arsenic – environmental factors affecting air ventilation in Hyvinkää
Hyvinkää’s building ordinance (2026) addresses soil-related risks exceptionally comprehensively: there is a duty to report the detection of both radon and arsenic, special plans must present solutions for radon mitigation, and building control may require that the design of the base floor structures and air ventilation ensures that harmful compounds from the soil cannot enter the building.
Hyvinkää is among the municipalities where many radon concentrations exceeding the reference value have been found—but according to the city’s own communications, many detached houses have still not been measured. The school design guideline (2019) states unambiguously: “Hyvinkää is a radon risk area,” and the indoor-air radon concentration must be determined in all sites.
In STUK’s municipality-specific detached-house radon statistics, Hyvinkää is listed on its own row with measurement counts and distribution data. The municipality is also on the list for mandatory workplace radon measurements.
Our air ventilation services in Hyvinkää
Our services match Hyvinkää’s diverse building stock—from the old railway town center to the modern, detached-house-dominated Vehkoja.
Air ventilation inspection and measurement – We measure airflow rates, pressure differentials, and make-up air routes. In Hyvinkää’s radon and arsenic risk area, assessing pressure balance is part of every inspection. → Read more about air ventilation inspections
Duct cleaning and cleaning – Routine baseline maintenance in Hyvinkää’s rental-housing stock and school properties. We clean duct systems and restore airflow rates to their designed level. → Read more about air ventilation cleaning
Air ventilation maintenance – For mechanical exhaust systems, we check the roof fan and make-up air routes. For supply-and-exhaust systems, we service the heat recovery (HRV) cores and filters. In energy-efficient detached houses, we verify control of the 5% negative pressure. → Read more about air ventilation maintenance
Air ventilation installation and renovation – Renovating mechanical exhaust systems in 1960s–1980s apartment buildings and detached houses into supply-and-exhaust systems. Hyvinkää’s building ordinance ties renovation to radon and arsenic control. → Read more about air ventilation installation
Air ventilation design and condition assessment – A documented practice in Hyvinkää’s public buildings: a condition assessment before replacing ventilation units. We offer the same service for housing companies and property companies. → Read more about air ventilation consulting
Hyvinkää building control’s air ventilation-specific requirements
Hyvinkää building control has two air ventilation–related special guidelines that are not found in all neighboring cities:
Guideline for air ventilation in an energy-efficient detached house (2011). The guideline specifies that a residential building requires mechanical supply and exhaust air ventilation with heat recovery, and sets out the sizing principle (the room air volume is exchanged once every two hours) and the option for boost mode. In low-energy and passive houses, 5% negative pressure is the design baseline—this is important in a radon area, because controlled negative pressure requires controlled make-up air.
School design guideline (2019). For teaching spaces, the outdoor air flow rate (reference to Decree of the Ministry of Social Affairs and Health 545/2015) is at least 6 l/s/person, local exhaust is required for special classrooms, and the air ventilation must not cause drafts. Radon measurement is required in all sites.
Price estimate and booking
The prices of our air ventilation services are the same in all cities within our service area. The most commonly ordered services in Hyvinkää:
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Air ventilation inspection – from €155
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Ductwork cleaning – from €785
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Ventilation unit maintenance – from €355
Detailed pricing and direct booking: See all services and prices →
Do you need a quote for a housing company or a larger property? Contact us →
Service area in Hyvinkää
We serve the entire Hyvinkää area—from the city center to rural districts.
City center and core area: Keskusta, Hämeenkatu, Sahanmäki, Parantola – the area around the railway station, apartment buildings and older detached-house stock, the city’s most densely built area
Eastern Hyvinkää: Vehkoja, Martti, Hyvinkäänkylä – detached-house areas from the 1970s–1980s, mechanical exhaust as the most typical air ventilation system
Southern Hyvinkää: Paavola, Metsäkalteva (Mutilankorpi-Kalteva) – a growing residential area with new builds and detached houses
Northern Hyvinkää: Nummenmäki, Ridasjärvi – a growing area and sparsely populated countryside
Western Hyvinkää: Kytäjä, Kaukas – rural manor and sparsely populated area, natural (gravity) air ventilation and private wells
Hyvinkää borders Nurmijärvi and Tuusula to the south and Riihimäki to the north. See our Nurmijärvi page →
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