When your central air system breaks down, finding the right evaporator coil replacement is the fastest way to restore your home cooling. The Trane A4MX 4-Way Cased Coil (Model A4MXC4260AC3HA) is engineered to be a direct fit for your 3.5 to 5 ton AC unit. This specific model features a standard 21 inch cabinet width, allowing it to sit perfectly on matching C-width furnaces without requiring custom sheet metal adjustments.
This 42,000 to 60,000 BTU cased coil uses an all-aluminum design to prevent the costly refrigerant leaks that frequently ruin older copper setups. To maximize your system performance, the housing is lined with advanced foil-faced thermal insulation. This keeps the cabinet from sweating, traps the cold air inside, and makes routine maintenance incredibly simple. Whether you need to buy this Trane cased coil online for a fast replacement or you want to schedule a local installation, this unit delivers the reliable climate control you expect.
Features of Trane 3.5 to 5 Ton A4MX Four Way Cased Coil A4MXC4260AC3HA
- All-aluminum coil design actively reduces the risk of structural refrigerant leaks.
- Sized perfectly for 21 inch wide furnace cabinets to ensure a clean and airtight match.
- Advanced foil-faced thermal insulation prevents internal condensation and makes cleaning effortless.
- Universal 4-way convertible layout seamlessly supports upflow, downflow, horizontal left, or horizontal right setups.
- Engineered to support high-efficiency split heat pump and air conditioning systems up to 15 SEER.
Specifications of Trane 3.5 to 5 Ton A4MX Cased Coil A4MXC4260AC3HA
Cased Coil Specifications | |
| Tonnage | 3.5, 4, 5 Tons |
| Capacity | 42000 – 60000 BTU |
| Coil Type | Cased |
| Configuration | Upflow, Downflow, Horizontal Left & Right |
| Refrigerant control | Piston |
| Lineset Connection Type | Sweat |
Maximum Airflow | |
| Upflow | 1850 CFM |
| Horizontal Left | 1850 CFM |
| Downflow | 1750 CFM |
| Horizontal Right | 1750 CFM |
Cased Coil Dimensions | |
| Gas Connection | 7/8 In |
| Liquid Connection | 3/8 In |
| Drain Connection | 3/4 In |
| Coil Height | 30 In |
| Coil Width | 21 In |
| Coil Depth | 20 In |
Cased Coil Weight | |
| Coil Weight | 76 lbs. |
| Coil Shipping Weight | 85 lbs. |



Alan (verified owner) –
Very well worth the money.
Michael (verified owner) –
Efficient, quiet, and great for any home.
Anthony (verified owner) –
Perfect temperature control with handy app features.
Isaac (verified owner) –
Reliable and keeps the whole house comfortable.
William (verified owner) –
Reliable and keeps the whole house comfortable.
Julian (verified owner) –
Very well worth the money.