Horizontal Slab Coils

Upgrade or replace with confidence using our 4-5 ton HVAC cased coil selection, engineered for today’s low-GWP refrigerants R-32 and R-454B. Built for performance, easy matching, and professional installation.

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4 - 5 Ton

These evaporator cased coils serve 4 and 5 ton applications across residential and light commercial jobs. Choose from multi-position or vertical-only cabinets to fit tight closets, upflow/downflow furnaces, or horizontal air handlers. Models are available in 21" and 24.5" cabinet widths for a clean, compatible fit with existing plenums and furnaces.

Designed for SEER2-era installations, these coils support the 4-5 ton BTU class and are available in refrigerant-ready configurations for R-32 or R-454B. Selecting the correct cabinet width, coil orientation, and metering setup helps maintain system efficiency, airflow, and dehumidification.

Whether you’re a licensed contractor refreshing a retrofit, a property manager planning a turnover, or a DIY-capable homeowner coordinating a pro install, you’ll find budget-friendly choices that match new condensers or prepare existing systems for upcoming refrigerant changes. Always confirm coil dimensions, line sizes, and orientation before ordering, and have a certified technician handle brazing, evacuation, charging, and commissioning.

Top Brands for 4 - 5 Ton

Shop trusted names like Rheem and Goodman for dependable 4-5 ton cased coils that align with today’s installation standards and refrigerant transitions.

Frequently Asked Questions

  • What size cabinet width (21" vs 24.5") do I need for a 4-5 ton cased coil replacement?

    Match the coil cabinet to your furnace or air handler width and existing plenum. Measure the current cabinet and supply opening to choose 21" or 24.5".

  • Are these cased coils compatible with R-32 or R-454B outdoor units?

    Yes-select models are built for R-32 or R-454B. Verify the coil’s refrigerant designation and metering device to match the outdoor unit.

  • When should I choose multi-position versus vertical-only coils?

    Use multi-position when flexibility is needed for upflow, downflow, or horizontal. Choose vertical-only when the install is fixed in a vertical orientation.

  • Can a 4 ton cased coil be paired with a 5 ton condenser or air handler?

    Only if the manufacturer’s specifications and AHRI match data allow it. Mismatched sizing can affect capacity and efficiency-consult your contractor.

  • Do these coils require a licensed contractor for installation and charging with new refrigerants?

    Yes. Brazing, evacuation, and charging R-32 or R-454B systems must be performed by a licensed professional for safety and warranty compliance.

  • How do I verify coil dimensions and line set connections before ordering?

    Confirm cabinet width, height, and depth; supply opening; drain pan orientation; and suction/liquid line sizes to match your existing equipment.

  • Are transition kits needed when replacing an older R-410A coil with R-32 or R-454B?

    Often yes. You may need new metering components, rated fittings, and line set preparation per manufacturer guidelines.

  • What maintenance is recommended to keep a 4-5 ton cased coil efficient?

    Change filters regularly, keep the coil and drain clean, ensure proper airflow, and schedule annual professional service.

  • Do I need a TXV specific to R-32 or R-454B?

    Yes. Use a metering device rated for the refrigerant in your system. Check product specs to confirm compatibility.

  • Will I need a new drain pan or plenum when upgrading the coil?

    If cabinet size or orientation changes, you may need a new pan or plenum modifications to maintain proper drainage and airflow.

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