How much does a new HVAC system cost?

Full system replacement: central AC + furnace: $5,000-$12,000. Heat pump: $4,000-$10,000. Mini-split (single zone): $1,500-$4,000. Mini-split (multi-zone): $5,000-$12,000. Geothermal: $15,000-$30,000+. National average: $7,000-$10,000 (central AC + furnace). Tax credits: heat pumps and geothermal qualify for up to 30% federal tax credit (through 2032). Financing: many HVAC companies offer 0% financing for 12-60 months.

How long does an HVAC system last?

AC: 15-20 years. Furnace: 15-25 years. Heat pump: 15-20 years. Mini-split: 20+ years. Geothermal: 25-50 years. Boiler: 20-30 years. Factors: maintenance (regular maintenance extends life 5+ years). Quality of installation. Usage patterns. Climate (extreme climates stress systems more). Key: the most important thing you can do is change the air filter regularly (every 1-3 months) and get professional tune-ups twice a year.

What size HVAC system do I need?

General rule: 1 ton of cooling per 500-600 sq ft (in moderate climates). 2,000 sq ft home: typically 3-4 ton system. But a proper Manual J load calculation is essential. It considers: square footage. Insulation level. Window size and orientation. Climate zone. Number of occupants. Ductwork condition. Oversizing is as bad as undersizing: too large cycles on and off too quickly (short-cycling). Wastes energy. Doesn't dehumidify properly. Costs more. Always get a Manual J calculation from your HVAC contractor. Avoid anyone who sizes based on square footage alone.

Heat pump vs furnace?

Heat pump: heats AND cools (one system). Very efficient in moderate climates (300-400% efficiency). Less efficient below 30-40 degrees F (modern cold-climate heat pumps work down to -15 degrees F). Electric (no gas line needed). Qualifies for federal tax credit. Cost: $4,000-$10,000. Furnace: heating only (need separate AC). Burns gas or oil. 80-98% efficiency. Works in any temperature. Most common in cold climates. Cost: $2,500-$6,000 (plus $2,500-$5,000 for AC). Recommendation: mild climate (Southeast, Southwest): heat pump. Cold climate: heat pump with backup heat OR high-efficiency gas furnace. Very cold climate: furnace (or cold-climate heat pump). Trend: heat pumps are rapidly gaining market share, especially with cold-climate models improving.

Article

Home Improvement

HVAC Guide: Types, Cost & How to Choose

Lumberama Editorial Team, HVAC & Home Comfort Specialists Nov 30, 2026 8 min read

HVAC System Types

Central air + furnace (split system): Most common in the US. Gas furnace for heating + AC condenser for cooling. Ductwork distributes air. Cost: $5,000-$12,000 (installed).

Heat pump (air-source): Heats and cools with one unit. Very efficient (300-400% efficiency in moderate climates). Cost: $4,000-$10,000 (installed). Best for mild to moderate climates (or with backup heat in cold climates).

Mini-split (ductless): Individual indoor units + outdoor compressor. No ductwork needed. Cost: $3,000-$8,000 (1-3 zones). Ideal for additions, older homes without ducts, and zoned comfort.

Geothermal heat pump: Uses ground temperature for heating and cooling. Most efficient (400-600%). Cost: $15,000-$30,000+ (installed). 50% less operating cost. Longest lifespan (25+ years indoor, 50+ years ground loop).

Boiler + radiators: Hydronic heating (hot water radiators or radiant floor). Cost: $3,000-$10,000 (boiler). No cooling (need separate AC). Common in older homes in the Northeast.

Cost

Full system replacement (installed): Central AC + furnace: $5,000-$12,000. Heat pump: $4,000-$10,000. Mini-split (single zone): $1,500-$4,000. Mini-split (multi-zone, 3-4 zones): $5,000-$12,000. Geothermal: $15,000-$30,000+.

Individual components: Furnace only: $2,500-$6,000. AC condenser only: $2,500-$5,000. Heat pump: $4,000-$8,000. Ductwork (new): $2,000-$6,000.

Annual operating cost: Gas furnace + central AC: $1,500-$3,000. Heat pump: $800-$2,000. Geothermal: $500-$1,500. Mini-split: $500-$1,500 (per zone varies).

Tax credits: Heat pumps (air-source): up to 30% credit (through 2032). Geothermal: up to 30% credit. Mini-splits (heat pump type): qualify for credits.

Maintenance & Efficiency

Efficiency ratings: AC/heat pump: SEER2 (higher = better). Minimum: 14-15 SEER2. Good: 16-18 SEER2. Excellent: 20+ SEER2. Furnace: AFUE (higher = better). Standard: 80% AFUE. High-efficiency: 90-98% AFUE.

Maintenance schedule: Change air filter: every 1-3 months. Professional tune-up: twice a year (spring for AC, fall for heating). Clean outdoor condenser coils annually. Check refrigerant levels. Inspect ductwork for leaks.

System lifespan: AC: 15-20 years. Furnace: 15-25 years. Heat pump: 15-20 years. Mini-split: 20+ years. Geothermal: 25-50 years. Boiler: 20-30 years.

Signs of replacement: Age (15+ years). Frequent repairs. Rising energy bills. Uneven temperatures. Excessive noise. R-22 refrigerant (phased out, expensive to recharge).