The Vaillant Small Rubber Anti-Vibration Feet — MPN 0020252091 — is Vaillant's genuine accessory kit for aroTHERM plus air-to-water heat pump outdoor units, supplied as a set of four small feet, one for each of the unit's four mounting points, complete with all fixings required for installation.
Fitted beneath the outdoor unit, the feet isolate operational vibration from the compressor and fan, reducing structure-borne noise transmission into the ground or mounting surface, while raising the base sufficiently to comply with Vaillant's warranty installation requirements.
Firm Cushioning
Damping Type
Fixings Incl.
Fitting Kit
Important Safety Information: Installation by a Qualified Installer
These feet form part of the outdoor unit's structural support and vibration isolation. Fitting must be carried out by a suitably qualified heat pump installer in accordance with Vaillant's installation instructions for the specific aroTHERM plus model, including correct ground or support base preparation.
Please Note: Confirm You Need the Small Feet, Not the Large Feet
Vaillant also offers Anti-Vibration Feet — Large (0020250226), a separate accessory supplied as a pair of 600mm feet that significantly raise the outdoor unit off the ground for improved condensate and drainage access. The small feet in this listing are a lower-profile alternative intended primarily for vibration isolation rather than a large ground clearance increase. Check your system design and site requirements to confirm which variant you need.
Vibration Isolation at All Four Corners
One foot is fitted at each of the unit's four mounting points, providing consistent vibration damping across the full footprint of the outdoor unit rather than at just two support points.
Firm Cushioning Construction
The feet use a firm rubber cushioning material suited to outdoor installation, absorbing compressor and fan vibration before it reaches the mounting surface.
Compact, Low-Profile Design
At approximately 230mm high, the small feet add a modest, low-profile lift to the outdoor unit — a more compact option than the large feet where significant extra ground clearance isn't required.
Suitable for Outdoor Installation
Designed and rated for permanent outdoor use beneath the heat pump's outdoor unit, supporting long-term weather exposure without degradation of damping performance.
Genuine Vaillant Accessory
As an official Vaillant part, the feet are engineered specifically for aroTHERM plus outdoor unit weight loading and mounting geometry, supporting correct installation and warranty compliance compared with generic anti-vibration mounts.
Supplied as a Complete Fixing Kit
The set comes complete with all fittings required for installation, avoiding the need to source separate fixings on site.
| Product Details |
| Manufacturer |
Vaillant |
| Product Type |
Rubber Anti-Vibration Feet (Small) — Heat Pump Accessory |
| Manufacturer Part Number (MPN) |
0020252091 |
| EAN |
4024074816370 |
| Quantity Supplied |
Set of 4 feet (one per mounting point) |
| Physical Specification |
| Material |
Rubber — firm cushioning |
| Foot Height |
230 mm |
| Foot Width |
160 mm |
| Foot Depth |
110 mm |
| Damping Type |
Firm cushioning, suitable for outdoor installation |
| Compatibility |
| Compatible Range |
Vaillant aroTHERM plus air-to-water heat pumps |
| Related Accessory |
Anti-Vibration Feet — Large (0020250226), pair, greater ground clearance |
| Fixings |
All required fittings included |
How many feet are included with this product?
This accessory is supplied as a set of four small feet, one for each mounting point of the outdoor unit — check the quantity carefully, as some listings use the word "Pair" in the title despite four feet being supplied.
What's the difference between the small and large anti-vibration feet?
The small feet (0020252091) in this listing provide vibration isolation with a modest lift of around 230mm, while the large feet (0020250226) are a separate pair of 600mm feet designed to raise the unit further off the ground for improved condensate and drainage access. Which you need depends on your site and system design.
Which Vaillant heat pumps is this compatible with?
This part (0020252091) is listed as a general accessory for the aroTHERM plus range.
Can I install these feet myself?
Fitting should be carried out by a suitably qualified heat pump installer as part of the outdoor unit installation, following the manufacturer's installation instructions for the specific model.
Does fitting the feet affect warranty compliance?
Correct installation with the specified anti-vibration feet helps ensure the outdoor unit mounting and ground clearance requirements set out in Vaillant's installation instructions are met, which can be a factor in maintaining warranty compliance.
