Vaillant 17-outlet manifold 75/62 mm - recoVAIR /4

Product detailed description

Vaillant 17-outlet distributor 75/62 mm - recoVAIR /4

The 17-outlet distributor is a higher-capacity variant of the distribution unit for the Vaillant recoVAIR /4 system, designed for larger family houses or buildings with a higher number of ventilated rooms, where the 12-outlet low-profile distributor is no longer sufficient to serve all end elements with a single component. Similarly to the smaller variant, this distributor is installed in the suspended ceiling or intermediate ceiling space near the central heat recovery unit (recoVAIR VAR 150/4, VAR 260/4 or VAR 360/4) and splits one main air flow from the round EPP duct of the main route into 17 separate branches with a diameter of 75/62 mm, each of which leads via a flexible hose to one end element - a diffuser, a disc valve, or an outlet in a specific room.

The higher number of outlets makes it possible to cover more extensive layouts with a greater number of rooms, bathrooms, dressing rooms or utility rooms with a single distributor instead of combining several smaller units, which simplifies both design and subsequent maintenance of the ductwork - all branches of a given circuit (supply or extract) meet at one clear central point instead of being scattered across several boxes in the ceiling.

Technical characteristics

• Type: air distributor/collector with higher outlet capacity
• Number of outlets: 17 x Ø75/62 mm (outer/inner connection diameter)
• Main connection: to the round EPP duct of the recoVAIR /4 system (spigot and spigot cap available as separate accessory parts)
• Body material: rigid plastic resistant to common mechanical and pressure loads during installation in a suspended ceiling
• Each outlet can be capped as needed with a separate 75 mm cap (sold in a package of 10 pcs)
• Designed for installation in the intermediate ceiling space or in a utility room near the central unit
• Compatibility with units: recoVAIR VAR 150/4 L, VAR 150/4 R, VAR 260/4, VAR 260/4 E, VAR 360/4, VAR 360/4 E
• Country of origin: Germany (Vaillant Group manufacturing plant)
• Warranty: 2 years from sale to the end customer

When to choose the 17-outlet instead of the 12-outlet distributor

The choice between the two variants always depends on the ventilation design, but a few general guidelines apply:

• Single-storey family houses with a common number of rooms (up to approx. 5-6 ventilated spaces per circuit) will be sufficiently served by the 12-outlet distributor.
• Multi-storey houses, larger layouts with several bathrooms, dressing rooms, offices or guest rooms, or houses with two residential units, usually already require a capacity of 17 outlets per circuit (supply or extract).
• When deciding between one 17-outlet distributor and two 12-outlet distributors, the simpler solution with a single central unit usually makes for easier overview and future servicing, provided the ceiling layout allows it.

The exact number and placement of distributors in the project is always determined by the ventilation designer based on the ventilation drawing and the number of end elements in individual rooms.

Installation - procedure and recommendations

1. The distributor is placed in the suspended ceiling or intermediate ceiling space as close as possible to the central unit, so that the main route of the round EPP duct is as short as possible and the pressure loss on it is minimal.
2. A spigot (a separate accessory part) is fitted onto the distributor box, through which the distributor is connected to the main round EPP duct coming from the unit.
3. A flexible hose 75/62 mm leading to a specific end element is connected to each of the 17 outlets - we recommend labelling the branches according to the target room as you go, to make later balancing and any future servicing easier.
4. Unused outlets (if the project does not use all 17 branches) are capped with separate 75 mm caps, so that no undesired air flow short-circuit occurs outside the active branches.
5. The distributor box is mechanically anchored to the ceiling structure so that it can bear the load during further installation work on the ceiling.
6. Before covering with the suspended ceiling, it is recommended to perform a pressure tightness test of the entire ductwork, including all 17 connections.

Balancing the system with a higher number of branches

The higher the number of outlets, and thus branches, in a single circuit, the more important careful balancing of air flows between individual rooms becomes. With 17 outlets, branches of significantly different lengths commonly occur in practice (from the room closest to the distributor to the furthest room at the opposite end of the layout), which, without proper balancing, can cause closer rooms to receive disproportionately more air at the expense of more distant spaces. We therefore recommend that, when implementing a larger ductwork with this distributor, you always plan for final measurement and adjustment of flows on individual branches after completing the installation, either using mechanical elements at the end outlets or electronically via the central unit's control.

Compatibility with the recoVAIR /4 system

This distributor is part of the closed accessory system for Vaillant recoVAIR /4 central units and connects to:

• the round EPP duct of the main route (via a separately purchased spigot),
• flexible hoses 75/62 mm (sold separately, e.g. in a 40 m roll),
• adapters and couplings of the same 75/62 mm diameter for connection to end outlets,
• 75 mm caps for capping unused outlets and a spigot cap for closing the main connection.

Do not combine this part with distributors or hoses from other manufacturers with a different connection diameter, to avoid a leaky joint or loss of the system's guaranteed performance.

Practical recommendations when designing ductwork with a higher number of outlets

• Position the distributor so that the average length of individual branches is as balanced as possible - significantly different branch lengths make balancing more difficult and may require additional throttling elements on shorter branches.
• With a large number of branches, pay increased attention to organizing the routing of individual hoses in the ceiling (e.g. using cable ties/trays) to prevent them from crossing and pinching each other.
• Ensure permanent access to the distributor (an inspection opening in the ceiling) - with 17 connections, the likelihood that intervention on one of the branches will be needed in the future is somewhat higher than with a smaller distributor.
• Prepare a clear diagram assigning individual outlets to specific rooms and keep it together with the house's project documentation for future servicing.

Maintenance and care

Once installed in the suspended ceiling, the distributor is a maintenance-free component with no moving or filtering parts. We recommend:

• whenever accessing the suspended ceiling, checking whether the distributor has suffered any mechanical damage or whether any of the 17 connected hoses has become loose,
• during regular filter replacement of the central unit, also periodically checking the tightness of the spigot connection to the main duct,
• during renovation or a change of layout, reassessing the use of individual outlets and reconfiguring the caps as needed.

Why choose an original Vaillant part

With a distributor having a high number of outlets, dimensional accuracy and the tightness of individual connections are even more critical than with smaller components - any leak becomes apparent in the overall air balance of the entire building when spread across 17 parallel branches. An original Vaillant part guarantees dimensional compatibility with all related components (spigot, caps, hoses, adapters) as well as the declared flow and pressure parameters stated in the recoVAIR /4 system's project documentation, which is crucial for the reliable operation of the whole house in installations with a higher number of ventilated rooms.

The original Vaillant order number designation also allows a service technician to immediately identify the exact type of component in the event of a warranty claim or system expansion, which is usually not possible without additional on-site measurement in the case of unmarked alternatives from other sources.

Frequently asked questions

Use in larger and multi-zone buildings

For larger family houses, two-generation houses with two separate residential units, or buildings with several functional zones (for example a main living area and a separate area for business or rental purposes), controlled ventilation with several distribution units is increasingly being designed, with the 17-outlet distributor representing a practical basis for each such separate zone. In practice, this means that a single recoVAIR /4 central unit with sufficient capacity can, through a branched system of main EPP ductwork, supply several distributors located in different parts of the ceiling, which shortens the average length of the end flexible branches and also simplifies future orientation within the system during servicing.

When designing such a multi-node solution, it is important that the ventilation designer correctly divides the total designed air flow among the individual distributors according to the actual needs of each zone - it is neither necessary nor advisable to divide the unit's capacity evenly regardless of the actual number and size of ventilated rooms in the individual zones.

Energy efficiency and properly sized ductwork

The 17-outlet distributor itself does not directly affect the system's energy consumption (it has no drive of its own and consumes no electricity), but its correct sizing and installation have an indirect yet real impact on overall operating efficiency. Branches that are too long or unevenly laid out from a single large distributor increase the overall pressure loss of the system, which requires higher fan power from the central unit and thus higher electricity consumption needed to achieve the designed ventilation performance. Conversely, a compactly designed ductwork with balanced branch lengths from a centrally placed distributor allows the unit to operate at the fan's optimal operating point, which in practice results in lower operating consumption and quieter operation throughout the system's service life.

Cost comparison: one large distributor versus several smaller ones

When deciding between one 17-outlet distributor and two smaller 12-outlet distributors, it is necessary to consider not only the purchase price of the components themselves but also the related installation and material costs. One large distributor means a single connection point to the main EPP duct (i.e. one spigot and one spigot cap), while two smaller distributors require doubling these components as well as potentially branching the main EPP duct route to both units. In most cases, for buildings where two smaller distributors would otherwise be needed to cover the same number of end elements, a single 17-outlet distributor turns out to be a simpler solution in terms of both material and installation, provided the ceiling layout and the position of the central unit allow it.

Documentation and handover of the system after installation

For ductwork with a higher number of outlets, we recommend handing over clear connection documentation to the client after completion of the installation - a diagram that clearly assigns each of the 17 outlets to a specific room and flow direction (supply or extract). This documentation is invaluable for any future servicing, change of room layout, or handover of the house to a new owner, who would otherwise have to become familiar with the distributor's wiring without any documentation, which significantly extends and increases the cost of any future intervention in the system.

Shipping and packaging

Due to the volume and shape of the distributor box with a higher number of outlets, this product is shipped by courier directly to the address, not via parcel lockers/pick-up points, to prevent damage to its shape during transport.