Choose Your Trunking System

Select the right trunking for your installation type below — all systems are designed for concealing AC pipework and cables on domestic and commercial installations.

• Neat domestic installations (most popular) — Inaba Slimduct
  The industry-standard trunking system for domestic split system AC installs. Clean, professional finish with a full range of bends, corners and accessories. Available in white and beige.
• Standard pipe concealment — Inoac Round Trunking
  Round plastic trunking for concealing insulated copper pipe and cables on wall surface runs. Simple, cost-effective and widely specified.
• Low-profile & flat duct installs — Sauermann Flat Duct
  Flat profile trunking for installations where minimal wall projection is required. Ideal for retrofit installs and tight spaces.

What Size Trunking Do I Need?

Trunking must be large enough to accommodate insulated pipe and control cables. Common sizes by application:

• 65–75mm systems — small domestic installs with a single insulated pipe pair and cable
• 100–110mm systems — standard domestic split system (most common) — fits 1/4" + 5/8" insulated pipe and 3-core cable
• 130–140mm systems — larger domestic or light commercial systems with larger bore pipe
• 150mm+ — commercial and multi-pipe runs, VRF/VRV systems

Always measure insulated pipe OD (pipe + insulation wall thickness) before selecting trunking size. Insulated 5/8" pipe with 13mm wall = approximately 38mm OD.

Where Trunking Fits in the Installation

Trunking is the final surface finish on an AC pipe run — fitted after pipework is insulated and clipped, it conceals and protects the installation for a professional result.

• Step 1 — run copper pipe and control cables between indoor and outdoor units
• Step 2 — apply pipe insulation and seal all joints
• Step 3 — clip pipework using pipe supports and fixings
• Step 4 — fit trunking over insulated pipe run for a clean, finished appearance

Complete the Installation

• Pipe Insulation — insulate pipework before fitting trunking
• AC Copper Pipe — refrigerant-grade pipe for AC systems
• Pipe Supports & Fixings — clip pipework before trunking
• Installation Materials — sealants, cable ties and finishing accessories

About Our Trunking Range

We supply AC trunking and cable management systems from Inaba, Inoac and Sauermann — the brands most commonly specified by HVAC engineers across the UK. Our range covers the most popular sizes and accessories for domestic and commercial air conditioning installations, all available from UK stock with fast trade dispatch.

Order AC trunking online today with fast UK delivery and trade pricing available.