Basic
$316 – $789 each
Bypass flow-through pad humidifier on the plenum with bypass duct, water line with shutoff, drain line, manual humidistat
Install a bypass or flow-through whole-house humidifier on an existing furnace, with water line, drain, humidistat and wiring.
Furnace Humidifier in Charleston, South Carolina typically costs $371 to $929 each as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Charleston are 8.0% lower than the national average for furnace humidifier.
National average: $400 – $1,000 each
$316 – $789 each
Bypass flow-through pad humidifier on the plenum with bypass duct, water line with shutoff, drain line, manual humidistat
$371 – $929 each
Bypass flow-through humidifier with bypass damper, water line with shutoff, drain, automatic humidistat with outdoor sensor
$464 – $1,161 each
Fan-powered flow-through humidifier for higher output, water line with shutoff, drain, digital humidistat with outdoor sensor
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $173 – $433 | each |
| Labor | labor | $122 – $305 | each |
| Supplies & Other | supplies | $46 – $115 | each |
| Equipment & Disposal | equipment | $31 – $76 | each |
Material costs in Charleston run proportionally higher than labor, which may favor labor-intensive approaches.
Connect with local furnace humidifier contractors in Charleston for personalized quotes based on your specific project.