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    Central Air Conditioner

    Lennox XC21 Two-Stage Air Conditioner

    Model Number: XC21

    A premium two-stage AC that balances high efficiency with a more accessible price point than the XC25.

    20 SEER2
    Two-Stage
    65 dB
    Smart Home Ready

    Technical Specifications

    Cooling Efficiency (SEER2)20
    EER214.5
    OperationTwo-Stage
    Tonnage3 Ton
    Sound Rating65 dB
    Smart ThermostatCompatible
    System TypeCentral Air Conditioner
    Installed Price$9,500 - $14,000

    *Prices include equipment, installation, and standard warranty. Actual cost may vary.

    Estimated Annual Savings

    Compared to a 10 SEER system

    $400

    per year

    $6000

    over 15 years

    Get Your Quote

    Why We Recommend This Model

    The XC21 gives you 90% of the XC25 experience at a significantly lower price. Two-stage operation handles Long Island's humid summers well.

    Ideal For

    Homeowners wanting premium efficiency without flagship pricing

    Expert Review: Lennox XC21 Two-Stage Air Conditioner

    The Lennox XC21 Two-Stage Air Conditioner is a premium option from Lennox, delivering 20 SEER2 efficiency with two-stage operation.

    Key Features & Technology

    Two-stage scroll compressor

    SilentComfort fan technology

    Quantum coil

    iComfort compatible

    Advantages

    • Excellent efficiency at 20 SEER2
    • Quiet two-stage operation
    • Strong value vs flagship
    • Good humidity management

    Considerations

    • Not as quiet as XC25
    • Still requires Lennox dealer network
    • Two-stage vs variable comfort gap

    Warranty & Protection

    Parts Warranty

    10 years

    Compressor

    10 years

    Our Guarantee

    100% Satisfaction

    All warranties require product registration within 60 days of installation. Our team handles registration for you.

    Professional Installation

    What's Included

    • Complete equipment and materials
    • Professional NATE-certified installation
    • Permits and inspections
    • Old system removal and disposal
    • System testing and calibration
    • Warranty registration

    Installation Timeline

    1

    Free Consultation

    Same-day or next-day

    2

    Installation Day

    Typically 4-8 hours

    3

    Final Inspection

    Ensure perfect operation

    We've installed 52+ Lennox XC21 Two-Stage Air Conditioner units across Nassau County

    Frequently Asked Questions

    About Lennox

    Lennox logo

    Lennox

    Ranked #3 Overall

    Efficiency-focused homeowners wanting the lowest utility bills

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    Get Your Free Quote

    NATE-certified technicians serving Nassau County with expert Lennox XC21 Two-Stage Air Conditioner installation.

    Get Free Quote (516) 345-3911

    Available 24/7 for emergencies

    Why Homets Air & Heat?

    • NATE-certified technicians
    • Same-day consultations available
    • Financing options available
    • 100% satisfaction guarantee
    • Local Nassau County company

    Ready to Install Your Lennox XC21 Two-Stage Air Conditioner?

    Get a free, no-obligation quote from our NATE-certified technicians. We serve all of Nassau County with expert installation and a 100% satisfaction guarantee.

    Get Free QuoteView More Lennox Models

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