HVAC Replacement Shopping Guide (In-Depth)

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Upgrading the envelope and repairing ducts reduces loads and improves comfort. Right-sizing after these upgrades often lowers equipment and operating costs.

In suitable climates, whole house fans purge hot indoor and attic air on cool evenings, cutting AC runtime. They need adequate attic venting and insulated covers when not in use.

Options include higher-MERV filters, fresh air ventilation, UV or bipolar ionization when appropriate, and humidity control. Balance cleaner air with fan energy and filter pressure drop.

Mini-splits are ideal for additions and isolated rooms, offering high efficiency and room-by-room control without costly duct runs.

New heat pumps or electric heat strips may require added circuits or higher ampacity. A licensed electrician should size wire, breakers, and permits.

Many jurisdictions and HOAs set maximum dB at property lines. Choose quiet outdoor units, add vibration isolation, or relocate equipment to comply.

Construction debris and dust can reduce airflow and foul new coils. Seal leaks, balance dampers, and verify airflow after cleaning.

Have a Manual J or similar load calculation performed. Oversized systems short-cycle and under-dehumidify; undersized systems struggle in extremes.

Shorter, well-insulated lines reduce pressure drop and heat gain, improving efficiency and reliability.

Add dedicated returns or transfer grilles to improve upstairs airflow and temperature balance.

Acoustic fencing, barriers, and strategic placement can cut compressor noise. Maintain clearances for airflow and service.

Condensing furnaces typically use PVC intake/exhaust and require proper drainage and slope. Plan vent routes before ordering.

Some warranties require annual maintenance, registered installation, or specific filters. Keep records and follow service schedules.

Air-seal with mastic or UL-181 tape and insulate ducts in unconditioned spaces to reduce losses and improve comfort.

Use professional methods after major work or when contamination is present. Verify results with before/after photos if possible.

Smart thermostats, zoning, load control, and monitoring apps can reduce energy bills and improve comfort when tuned correctly.

Verify program eligibility, income or equipment requirements, and timelines before you buy to maximize savings.