Ventilation

By insulating, the natural ventilation of the building disappears. There is no more natural supply because gaps and seams are closed. One possibility to supply air in a natural way is to install (insulated) ventilation grilles. This can be done in the facade or in combination with new windows. Consult with the municipality on which option will best suit the facade appearance. If it is not allowed to install grilles, it is an option not to close any gaps above 1.80 metres. At this height, you will have little to no draught, but fresh air will still enter the building.

• Contributes to a healthy indoor climate
• No noise production
• Maintenance friendly
• No electrical control required
• Supply air temperature is not adjustable and can lead to comfort problems at low temperatures
• Limited dampening of outside noise
• Heat can be lost through grids
• Only possible if no historically valuable parts are affected

If ventilation ducts are not possible in your building, a decentralised ventilation system with heat recovery may be the solution. You can then install a facade ventilation unit in a room you often use. The ventilation unit regulates both the extraction of polluted air and the supply of clean air. Heat recovery ensures that the heat from the extracted air heats up the fresh air, so that heat is not lost and you save energy. The grilles for air extraction and supply are also available in brick format so that they are virtually invisible. The other rooms can be provided with natural ventilation through ventilation grilles. Toilet, shower and kitchen are separately extracted mechanically, which does require ducts.

• No need for a large channel system.
• Heat recovery from ventilation air
• The sound can be perceived as disturbing
• This is an electrical system that can increase electricity consumption, which is more than compensated for by energy gains from heat recovery.
• Kitchen, toilet and shower still need to be separately mechanically extracted

Good ventilation is important for healthy air in the building. A demand-driven ventilation system with smart sensors works efficiently. For instance, CO₂ sensors detect the need for clean air in rooms such as the bedroom or living room. And in the bathroom or kitchen, humidity sensors measure humidity. The system only turns on if the CO₂or humidity levels are too high. With the choice of a demand-driven ventilation system, fresh air is only supplied when needed.

• When providing the system with CO₂ sensors, no more fresh air will be supplied than necessary
• Ventilates efficiently and energy-consciously
• It is important that the system is properly set up and maintained.
• At least 1 sensor has to be installed per room to be controlled

There are various options for ventilating your building. Balanced ventilation is a central system for ventilating the entire building. Fresh outside air is blown into the rooms via a duct system from a supply air box. And the exhaust air box, in turn, dissipates the 'used' air. In a heat recovery unit, the supply and exhaust air boxes are brought together so that heat is exchanged and energy is saved. A balanced ventilation system with CO₂ and humidity sensors is efficient because no more fresh air is supplied than necessary.

• The supply air is filtered, ensuring a healthy indoor climate
• Heat recovery from ventilation air
• When providing the system with CO₂ sensors, no more fresh air will be supplied than necessary
• Creates a pleasant indoor climate
• Works less well when windows are open
• Consider the aesthetic consequences for your property when installing supply and exhaust channels.
• It is important that the system is properly set up and maintained.
• Good positioning is important to prevent noise nuisance

When an existing air handling unit needs to be replaced, this can become a major cost item. New air handling units are larger, which means that the current architectural setup may not be sufficient. Overhauling (partially replacing) the air handling unit can be a solution. During an overhaul of the air handling unit, all components are inspected and checked and replaced where necessary. Thus, the components can be replaced by modern, more efficient variants. For example, the fan can be replaced by direct-driven plug fans with energy-efficient motors, the heat exchanger with a low-temperature version to prepare the switch to, for example, a heat pump, the installation of modern control technology and the cleaning and coating of the housing and replacement of the filters.

• No major structural interventions required
• High energy savings
• There are no parts thrown away unnecessarily
• Costs are lower
• Longer lifespan of the air handling unit
• Have a start measurement performed to inspect and check the components
• Check whether the air flows meet the current standards and requirements
• New air handling units are larger and therefore more energy efficient
• Options are sometimes limited by current placement or dimensions

Goede ventilatie is belangrijk voor gezonde lucht in het pand. De adaptieve temperatuur grenswaarden-methode betekent dat u de ventilatie en verwarming van het pand gaat bepalen op basis van de luchtvochtigheid en het aantal personen binnen. De systemen worden ook aangepast op het seizoen, bijvoorbeeld een lage luchtvochtigheid in de winter lage luchtvochtigheid en een hoge luchtvochtigheid in de zomer. Adaptieve installaties zijn een efficiënte manier van ventileren en verwarmen omdat het gebruik wordt aangepast aan de situatie.

• Saves energy
• Chemical degradation is limited
• Comfort remains the same or increases
• Do not allow temperatures and humidity to fluctuate too much within short periods of time, but over seasons
• Temperature set points may depend on the seasons, but fixed upper and lower limits should be used for humidity

By making the ventilation system demand-driven, the system does not always have to run at 100%. Older systems use a slip clutch, suction damper or have only two positions, so the motor uses more power than it needs. The motor can be regulated down by means of a frequency inverter, which saves a lot of energy. Savings depend on the type and power of the motor.

• Saves energy
• Highly efficient system
• The savings depend on the type of motor, the number of operating hours and the number of hours that the electric motor can run at a lower setting
• The type of frequency inverter must be coordinated with the type of electric motor

In many cases it is advantageous to replace the fan including motor with modern plug fans. If the air handling unit is equipped with indirectly driven centrifugal fans, these can be replaced by energy-efficient and frequency-controllable plug fans. This allows you to make your air handling unit energy-efficient and controllable in one step.

• Saves energy
• Saves energy through efficient heating
• Easy to regulate on, for example, CO₂, humidity, etc.
• Plug fans are much quieter than asynchronous motors
• This is always work for a professional company

Veel luchtbehandelingskasten staan onnodig veel aan. Dit kost elektriciteit (ventilatoren) en er gaat onnodig warmte of koude verloren. Door te sturen op aanwezigheid, kan zodoende veel energie worden bespaard. Sturen op aanwezigheid kan het beste d.m.v. CO₂-sturing. Bij een hogere bezetting neemt de CO₂-concentratie toe, waarna de ventilatoren (harder) gaan draaien. Zo wordt een prettig binnenklimaat gerealiseerd, en onnodig energieverlies voorkomen.

• Contributes to a healthy indoor climate
• Saves energy
• To regulate based on CO₂, the engines must be speed controlled
• If there is insufficient ventilation in the current situation, CO₂ control can increase energy consumption

Om de binnencondities constant te houden is het in sommige gevallen nodig te bevochtigen of ontvochtigen. Het be- of ontvochtigen kost relatief veel energie, probeer dit dus op een zo duurzaam mogelijke manier te doen. Laat de luchtvochtigheidswaarde afhangen van de buitencondities (bijvoorbeeld 's winters 40%, 's zomers 60%). Bij toepassing van een warmtewiel in de luchtbehandelingskast kan naast energie,  ook vocht worden teruggewonnen. Daarnaast zijn adiabatische bevochtigers een stuk zuiniger dan bijvoorbeeld stoombevochtigers.

• Contributes to a healthy indoor climate
• Locally placed units can be used more energy-efficiently than central units
• Humidifying or dehumidifying can consume a lot of energy
• Do not humidify more than necessary. Adjust the requirements for the indoor air to the type of space or type of exhibition