Straight Cool 3 - 25 Ton

Outfit your project with Straight Cool packaged rooftop AC built for light commercial comfort-cool-only performance with electric heat options, dependable operation, and value pricing for professional installs.

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Straight Cool 3 - 25 Ton

These commercial package ACs deliver cooling only (with electric heat kit options) in one curb-mounted rooftop cabinet. Ideal for licensed contractors, property managers, and light commercial retrofits, they simplify replacements and new installs while keeping budgets on track.

Choose capacities from 3 to 20 tons with SEER2 ratings from 13.4 to 14, matched to your load and climate. Models are available with R-32 for lower GWP and efficiency gains or R-410A for wide service familiarity. Airflow options include factory downflow or convertible downflow/horizontal to reuse existing ductwork.

Select the chassis that fits your curb and crane plan: small (3-6 ton), medium (7.5-12.5 ton), and large (15-25 ton). Many units accept field- or factory-installed electric heat in multiple kW sizes, plus economizers, curb adapters, and hail or coil guards to streamline rooftop changeouts and maintenance.

Top Brands for Straight Cool 3 - 25 Ton

Shop trusted Daikin and Rheem rooftop units known for rugged cabinets, smart service access, and strong parts support-delivering reliable cooling performance at a budget-friendly price point.

Frequently Asked Questions

  • What tonnage range should I choose for my light commercial space?

    Always size via a professional load calculation. Typical selections span 3-20 tons here, with occupancy, ventilation, and internal gains driving the final pick.

  • What is the difference between downflow and downflow/horizontal airflow configurations?

    Downflow discharges supply air to the curb below. Downflow/horizontal adds side-supply capability for reuse of lateral ductwork or adapter curbs.

  • How do SEER2 ratings of 13.4-14 impact operating costs for rooftop units?

    Higher SEER2 lowers annual kWh. Moving from 13.4 to 14 can trim cooling energy a few percent; also review EER and IEER for incentives.

  • Should I choose R-32 or R-410A refrigerant for future compliance and serviceability?

    R-32 offers lower GWP and efficiency benefits; R-410A remains widely serviced. Check local codes, utility programs, and service network before deciding.

  • Are electric heat kits included with these cool-only package ACs or selected separately?

    Electric heat is typically ordered by kW as a separate kit or factory option. Verify breakers, wiring, and controls compatibility per the submittal.

  • Which chassis size aligns with 3-25 ton installations and curb sizes?

    Small: 3-6 ton; Medium: 7.5-12.5 ton; Large: 15-25 ton. Confirm brand-specific footprints and curb adapters for replacements.

  • Do these packaged AC units require a licensed contractor for installation and startup?

    Yes. Crane lifts, electrical, condensate, airflow setup, and commissioning must meet code and manufacturer requirements to protect warranty.

  • What are the power and electrical requirements for these packaged rooftop units?

    Power varies by tonnage; many small and medium RTUs use 208/230V or 460V three-phase. Check nameplate MCA, MOP, disconnect, and breaker sizing.

  • Can these RTUs replace existing cool-only units on the same curb?

    Often yes, with manufacturer curbs or adapter curbs. Verify supply and return openings, weight, and clearances before scheduling the lift.

  • What control options are available for building integration?

    Standard 24V cooling with electric heat, economizer integration, and available BAS interfaces. Coordinate with your thermostat or EMS specifications.

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