🌬️ Koller Air Blower 3604/1 – 440W Pneumatic Bath Blower

Compact Power, Flexible Control – The Smart Choice for Your Spa 💨

📋 Product Overview

The Koller 3604/1 Air Blower is a compact, efficient 440W non-heated blower engineered specifically for spa, whirlpool, and bath systems. Manufactured by Rudolf Koller, a German company with over four decades of expertise in whirlpool technology, this blower delivers reliable bubble massage performance with whisper-quiet operation.

What sets the 3604/1 apart is its integrated pneumatic switch, enabling seamless control via an electronic control box or a simple air button – giving you complete flexibility in how you operate your spa system. The unique vertical body design makes this blower perfect for tight installation spaces where conventional horizontal blowers simply won’t fit.

Designed for domestic use and built to European quality standards with IP45 protection, the Koller 3604/1 is ideal for hot tub owners, spa installers, and anyone seeking a dependable, space-saving air blower solution that combines German engineering with practical installation flexibility.

⭐ Key Features

✅ 440W Motor Power – Delivers strong, consistent airflow for an invigorating bubble massage experience without overcomplicating your system

✅ Integrated Pneumatic Switch – Operates via air button or electronic control box, giving you flexible control options to suit your installation

✅ Compact Vertical Body Design – Unique space-saving configuration fits into tight spots where standard blowers cannot, maximising installation flexibility

✅ Flexible Mounting Options – Can be installed vertically or horizontally using a single central bolt on the removable mounting clip

✅ Quiet Operation – Engineered for low-noise performance, ensuring peaceful bathing without disruptive motor sounds

✅ Standard 1½” Connection – Buttressed connection provides compatibility with a wide range of union fittings for easy integration

✅ IP45 Water & Dust Protection – Suitable for humid bathroom environments with protection against water jets and solid objects

✅ 220-240V / 50Hz Compatibility – Standard UK electrical supply compatible for straightforward installation

✅ Bare End Cable (2m) – Supplied with 2-metre cable for direct connection to spa control boxes, making replacement installations straightforward

🔧 Technical Specifications

Specification	Details
Model	Blower Series X604
MPN	3604-1
Motor Power	440W
Speed	1 Speed
Variable Speed	No
Heated	No
Pneumatic Switch	Yes
Connection Size	1.5″ (1½” buttressed)
Voltage/Frequency	220-240V / 50Hz
Protection Rating	IP45
Cable Length	2m
Cord Length	1m
Plug Type	Bare End
Mounting	Vertical or Horizontal (central bolt clip)
Body Design	Compact Vertical
Rated Use	Domestic Use

🎯 Real World Examples & Applications

🛁 Whirlpool Bath Enhancement

The Koller 3604/1 is perfectly suited for residential whirlpool baths where space is at a premium. The compact vertical design fits neatly beneath baths or in confined service voids, while the pneumatic control allows simple air button activation from the bath side. Quiet operation ensures relaxing evening soaks without motor disturbance.

💆 Spa System Upgrade

For existing spa systems requiring blower replacement, the 3604/1’s bare-end cable allows direct connection to your current control box. The standard 1½” connection ensures compatibility with most existing pipework, making it an ideal like-for-like upgrade that can often be completed without major system modifications.

🔄 Blower Replacement

When older blowers fail or become excessively noisy, the Koller 3604/1 offers a reliable replacement solution. The single-bolt mounting clip simplifies removal of old units and installation of the new blower. German engineering and IP45 protection mean you’re investing in a long-lasting replacement.

🏠 New Installation Projects

For spa installers fitting new whirlpool systems, the 3604/1’s flexible mounting orientation (vertical or horizontal) accommodates various installation scenarios. The pneumatic switch integration reduces wiring complexity, while the compact footprint leaves room for other system components.

🏢 Light Commercial Applications

Suitable for small commercial installations such as B&B spa facilities, holiday rental hot tubs, or small wellness rooms where domestic-rated equipment is appropriate. The robust construction handles regular use while maintaining quiet operation for guest comfort.

🛠️ Installation Considerations

⚠️ Professional Installation Recommended – This blower should be installed by a competent tradesperson or qualified spa technician to ensure safe and proper operation.

Electrical Requirements

• Voltage: 220-240V AC
• Frequency: 50Hz
• Connection: Bare end cable (2m length) for direct wiring to control box
• All electrical work must comply with current wiring regulations (BS 7671)

Mounting Options

• Vertical mounting: Primary orientation taking advantage of compact body design
• Horizontal mounting: Alternative configuration using the same central mounting clip
• Single-bolt fixing via removable central mounting clip for secure installation

Connection Details

• Outlet size: 1½” (38mm) buttressed connection
• Compatible with standard spa and whirlpool union fittings
• Ensure airtight connections to maintain optimal airflow performance

Ventilation Requirements

• Ensure adequate airflow around the blower motor for cooling
• Do not enclose in completely sealed spaces without ventilation provision
• Maintain access for future servicing or replacement

Important Safety Notes

• Water and electricity are dangerous – ensure all connections are correctly made and waterproofed
• The blower must be installed in accordance with manufacturer guidelines
• IP45 rating provides splash protection but the unit should not be submerged
• Electrical items are non-returnable once opened or installed

🏆 Why Choose the Koller 3604/1 Air Blower

✅ German Engineering Quality – Rudolf Koller brings over 40 years of whirlpool technology expertise, ensuring premium build quality and reliability

✅ Space-Saving Design – The unique vertical body configuration fits where other blowers cannot, solving tight installation challenges

✅ Versatile Control Options – Integrated pneumatic switch works with air buttons or electronic control boxes, adapting to your preferred system setup

✅ Quiet Performance – Engineered for low-noise operation, so your relaxation isn’t interrupted by a noisy motor

✅ Easy Installation – Single-bolt mounting and standard 1½” connections simplify both new installations and replacement scenarios

✅ IP45 Protected – Built for humid bathroom environments with appropriate water and dust ingress protection

🤝 Why Buy from Parts4tubs?

✅ UK-based specialist supplier with expert knowledge of spa and hot tub components

✅ Expert technical advice available – speak to people who understand your system

✅ Fast UK delivery to get your spa back up and running quickly

✅ Competitive pricing on genuine manufacturer parts

✅ Genuine Koller products – no cheap imitations

✅ Dedicated customer support before, during, and after your purchase

✅ Secure online ordering for peace of mind

✅ Clear returns policy (note: electrical items non-returnable once opened/installed)

✨ Summary

The Koller 3604/1 440W Air Blower combines German engineering excellence with practical design innovation. Its compact vertical body solves space challenges, while the integrated pneumatic switch provides flexible control options. Quiet operation, IP45 protection, and easy single-bolt mounting make this blower perfect for whirlpool baths, spa replacements, and new installations alike. Upgrade your spa system with confidence – order your Koller 3604/1 today.