![\"uusi](\"https:\/\/www.vallox.com\/app\/uploads\/2023\/10\/20230613_115015-300x92.png\"\n)
\n <\/h6>\n\n\n\nWhat Should Be Considered During a Ventilation Renovation? Does Replacing a Ventilation Unit Require a Building Permit?<\/h2>\n\n\n\n
Replacing a ventilation unit requires expertise from several different trades. All fixed installations, such as installing a power outlet, must be carried out by a qualified electrician, and a new outlet may require residual-current protection. Even though the external electrical connections of a ventilation unit typically operate at low voltage, they still require proper knowledge and expertise. Airflow balancing requires specialized equipment and professional competence. The condensate drain connection must be reconnected, and duct insulation should be inspected and repaired if necessary. Cabinetry surrounding the unit may also need to be modified or relocated.<\/p>\n\n\n\n
In addition, it is important to determine whether the work requires permits or notifications. Replacing a ventilation unit alone does not require a building permit. However, if more extensive modifications are carried out at the same time, such as significant alterations to a bathroom, the situation may change. If a completely new mechanical ventilation system is installed in an existing building, or if the work affects load-bearing structures, fire safety, or the building’s main technical systems, a building permit must be obtained.<\/p>\n\n\n\n
In housing companies, the ventilation unit is generally the responsibility of the housing company. Consequently, replacing the unit typically requires an alteration notification to be submitted.<\/p>\n\n\n\n
<\/h6>\n\n\n\nA Clear Contract Is an Important Part of a Ventilation Renovation<\/h2>\n\n\n\n
Before preparing a quotation or providing a cost estimate, it is usually advisable to carry out a site survey. From an installer’s perspective, important details may become apparent that the resident may not consider significant for the progress of the renovation. In addition, solutions that were commonly used decades ago may no longer be considered appropriate according to current standards and best practices.<\/p>\n\n\n\n
If the ventilation unit replacement is carried out as a contracted project, it is important that all work included in the contract is clearly documented. It is equally important to specify what is not included in the scope of work in order to avoid misunderstandings, unexpected costs, and disappointment. The agreement should define the details as precisely as possible, including user guidance and final cleaning. The schedules of any contractors involved should also be coordinated carefully.<\/p>\n\n\n\n
The existing conditions, and therefore the appropriate implementation methods, can vary considerably between projects. Some homeowners prefer to carry out part of the work themselves, while others prefer a turnkey solution. Different housing types also require consideration of whether responsibility for the ventilation system lies with the resident or the housing company.<\/p>\n\n\n\n
<\/h2>\n\n\n\nWhat Should Be Considered Before Replacing a Ventilation Unit?<\/h2>\n\n\n\n
If the ventilation ducts have not been cleaned for a long time, it is advisable to do so before or during the ventilation unit replacement. Duct cleaning will often also reveal whether the ductwork requires repairs. If noise from the existing ventilation unit is disturbing in living rooms or bedrooms, additional sound attenuation should be installed in the ductwork or the existing silencers should be replaced with more effective ones. There can be significant differences in the performance of modern silencers, so their attenuation values should be compared carefully. As a rule of thumb, rectangular silencers generally provide better sound attenuation than circular models. In some cases, the difference can exceed 10 decibels.<\/p>\n\n\n\n
It is also important to understand the operating principle of the selected ventilation unit, as this may affect noise levels. The built-in humidity and carbon dioxide sensors in MyVallox ventilation units<\/strong> automatically adjust fan speeds, which means that fan noise levels may vary. Therefore, if noise from the previous unit has been a problem, particularly in bedrooms or living rooms, additional sound attenuation should be installed or existing silencers upgraded.<\/p>\n\n\n\n To facilitate the installation work, it may be sensible to remove cabinetry located beneath or around the ventilation unit in advance. A suitable lifting device makes the removal of the old unit and installation of the new one safer and more convenient, but sufficient working space is required for the lift. If the ducts extending from the ceiling space are not adequately supported, aligning them with a ventilation unit suspended by a lifting device can be carried out more safely and accurately, as there is no need to support the unit manually during installation.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n <\/p>\n\n\n\n Electrical installations may also require modifications. New MyVallox ventilation units<\/strong> are always equipped with a power plug. The existing cable leading to the control panel usually cannot be reused, as a NOMAK cable<\/strong> must be installed between the new MyVallox control panel and the ventilation unit. If the existing ventilation unit is controlled through a cooker hood, the old hood must also be replaced with a new one. In many cases, however, a separate cooker hood is installed at the same time as the ventilation unit replacement.<\/p>\n\n\n\n It is also worth remembering one small but important detail: internal connectors<\/strong>. Today, all new ventilation units are equipped with full-size duct connections. This means that components such as duct bends can be connected directly to the unit, whereas a straight duct cannot. If the old ventilation unit had undersized outlet connections with rubber gasket seals, the ductwork may have been connected directly to the unit. In such cases, internal connectors are required when connecting the ductwork to the new ventilation unit. It can be frustrating if an installation is delayed simply because a few inexpensive parts are missing.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n<\/h2>\n\n\n\n
![\"uusi](\"https:\/\/www.vallox.com\/app\/uploads\/2023\/10\/koneennosto_1920x1080px-300x169.png\"\n)
\n ![\"Vallox](\"https:\/\/www.vallox.com\/app\/uploads\/2023\/10\/125MVasennus_1920x1080px-300x169.png\"\n)
\n Connect your ventilation unit to MyVallox Cloud service<\/h2>\n\n\n\n