Line set covers are decorative PVC or metal channels that conceal the refrigerant lines, condensate drain, and communication wire running between your mini split's indoor and outdoor units. The best overall cover kit is the Decorative PVC Line Cover Kit (Rectorseal LD series or equivalent) at $80–$150 for a complete installation — paintable, UV-resistant, and available in straight sections, 90° elbows, couplings, and wall entries to handle any routing.
Why Install Line Set Covers?
Without covers, your mini split's connection bundle (two copper lines wrapped in black insulation, a drain line, and a wire) runs exposed along your exterior wall. While functional, exposed lines look messy, are vulnerable to UV degradation, and can be damaged by lawn equipment, animals, or weather.
| Factor | Without Covers | With Covers |
|---|---|---|
| Aesthetics | Exposed black insulation | Clean, paintable channel |
| UV protection | Insulation degrades in 3–5 years | Protected indefinitely |
| Physical protection | Vulnerable to impact | Shielded by rigid PVC |
| Pest protection | Rodents can chew insulation | Enclosed and sealed |
| HOA compliance | Often fails HOA standards | Typically approved |
| Cost | $0 | $80–$300 |
Top Line Set Cover Kits
| Rank | Brand | Material | Sizes | UV Resistant | Paintable | Price | Best For |
|---|---|---|---|---|---|---|---|
| 1 | Rectorseal Slimduct LD | PVC | 3.5" and 4.5" | Yes | Yes | $90–$150 | Most installations |
| 2 | DiversiTech SpeediChannel | PVC | 4" | Yes | Yes | $80–$130 | Budget choice |
| 3 | Inaba Denko Slimduct SD | PVC | 3" and 4" | Yes | Yes | $100–$180 | Premium quality |
| 4 | MrCool LineGuard | PVC | 4" | Yes | Yes | $80–$120 | MrCool compatibility |
| 5 | Pioneer Line Set Cover | PVC | 3.5" | Yes | Yes | $60–$100 | Budget option |
Key Takeaways
- Top line set cover kits for mini splits — PVC, paintable, and decorative options
- Sizing, installation steps, and which covers fit MrCool, Senville, and more
- Always verify specifications against the AHRI directory for independently certified performance data
- Consider the federal $2,000 tax credit and state rebates when calculating total cost