Buyers typically spend a broad range on a Dedicated Outdoor Air System (DOAS) depending on capacity, ventilation requirements, and integration with existing HVAC. The price drivers include equipment size, controls, ductwork, and installation complexity. This article presents cost ranges in USD, with clear low, average, and high figures to aid budgeting.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| DOAS equipment | $6,000 | $12,000 | $20,000 | Standalone or integrated unit; variable air volume control |
| Installation labor | $3,000 | $7,000 | $15,000 | Includes wiring, controls, testing |
| Ductwork & integration | $2,500 | $6,500 | $12,000 | New or retrofit; flex vs sheet metal |
| Permits & codes | $300 | $1,200 | $3,000 | Local requirements vary |
| Delivery & disposal | $200 | $800 | $2,000 | Transportation and waste handling |
Assumptions: region, system size, building type, and labor hours.
Overview Of Costs
DOAS project ranges typically run from about $11,000 to $47,000 in total, with per-unit costs often quoted as $40 to $140 per installed CFM depending on capacity and features. The low end covers small to mid-size applications with basic controls, while the high end reflects large, high-ventilation setups with advanced energy recovery and sophisticated automation. Some projects separate equipment cost from installation for clearer budgeting.
Cost Breakdown
The cost breakdown below shows how the total is assembled and how per-unit pricing can appear.
| Category | Low | Average | High | Notes | Formula |
|---|---|---|---|---|---|
| Materials | $6,000 | $12,000 | $20,000 | DOAS unit, fans, heat recovery, filters | |
| Labor | $3,000 | $7,000 | $15,000 | Installation, wiring, commissioning | |
| Equipment | $1,500 | $4,000 | $8,000 | Controls, dampers, actuators | |
| Permits | $300 | $1,200 | $3,000 | Code compliance | |
| Delivery/Disposal | $200 | $800 | $2,000 | Shipping, packaging disposal | |
| Warranty & Overhead | $300 | $1,200 | $3,000 | Contractor margin and parts warranty |
Assumptions: region, project size, and complexity influence each line item.
Factors That Affect Price
Key price drivers include ventilation rate targets, energy recovery type, and integration with existing systems. Larger buildings or higher outdoor air demands push equipment and labor costs upward. Specific thresholds to watch include CFM capacity; for example, higher capacity DOAS units and energy recovery ventilators (ERV/HRV) raise both equipment and installation complexity. Building envelope quality, duct routing challenges, and control sequencing also sway final pricing.
Ways To Save
Budget-minded buyers can reduce costs by selecting standard configurations, opting for retrofit installs during off-peak periods, and coordinating with existing mechanical work. Savings opportunities include using common control platforms, minimizing custom ductwork, and bundling DOAS work with other HVAC projects to reduce mobilization charges. Accurate load calculations and early vendor scoping help avoid over-specification and surprise costs.
Regional Price Differences
Prices vary by region due to labor markets, permitting, and material availability. In the Northeast, higher labor rates and stricter codes can push total costs 5–12 higher than national averages. The Midwest often presents moderate costs, while the West Coast may see 8–15 higher totals due to logistics and demand. Local market variations can swing bids by ±10 to ±18 percent.
Labor & Installation Time
Labor hours commonly range from 40 to 120 hours depending on building size, access, and integration complexity. Smaller retrofits might be 40–60 hours, while large new construction or complex controls can exceed 100 hours. A typical crew includes mechanical, electrical, and controls specialists. Shorter timelines reduce labor costs but may increase scheduling risk and permit pressure.
Real-World Pricing Examples
Three scenario snapshots illustrate typical setups and costs.
Basic — 4,000 CFM DOAS with standard ERV, retrofit into existing building; labor 40–50 hours; total $11,000–$15,000; $/CFM around 2.75–3.75; Notes: limited controls, no complex zoning.
Mid-Range — 8,000 CFM DOAS with advanced controls and duct integration; labor 70–90 hours; total $22,000–$34,000; $/CFM around 2.75–4.25; Notes: moderate zoning, basic energy recovery.
Premium — 15,000 CFM DOAS with high-efficiency ERV, full building automation, and custom ductwork; labor 90–120 hours; total $40,000–$65,000; $/CFM around 2.75–4.35; Notes: complex integration, high-performance filters, commissioning.
