Gas systems cost less upfront and have decades of infrastructure, but heat pumps now outperform on efficiency and IRA incentives reduce the capital gap. Here's the full picture for commercial buildings.
Key metrics for a 50,000 sq ft commercial office building replacing an aging HVAC system.
| 🔥 Natural Gas System | ⚡ Electric Heat Pump | |
|---|---|---|
| Installed Cost (50k sqft) | $180,000 – $320,000 | $260,000 – $480,000 |
| After IRA 48C Credit (30%) | Not eligible | $182,000 – $336,000 net |
| Heating Efficiency (AFUE/COP) | 80 – 98% AFUE | 250 – 450% effective (COP 2.5–4.5) |
| Heating Cost per MMBtu | $8.16 – $12.24 (gas $7–10.5/MMBtu) | $9.56 – $19.11 (varies by COP + rate) |
| Separate Cooling Required | Yes — add $80k–$150k for chiller | No — integrated heating + cooling |
| Combined HVAC 20yr Cost | $580,000 – $920,000 | $440,000 – $720,000 (post-IRA) |
| CO₂ Emissions (heating) | ~117 lbs CO₂/MMBtu | 20–80 lbs CO₂/MMBtu (grid-dependent) |
| Equipment Lifespan | 20–30 years | 15–25 years (air-source); 20–30 (geothermal) |
| ESG / Net-Zero Compatibility | Difficult — direct scope 1 emissions | High — can reach net-zero with renewables |
| Fuel Supply Risk | Moderate — price volatility | Lower — on-site solar hedge possible |
| Maintenance Complexity | Moderate (combustion, venting) | Lower (no combustion, fewer parts) |
| Cold Climate Performance | Reliable to -40°F | Modern CCHP units rated to -15°F |
The right answer depends on your climate zone, existing infrastructure, ESG goals, and how long you plan to hold the asset.
Get a free energy audit that models both options with your actual utility rates, climate zone, and IRA credit eligibility.