Buyers typically pay for a dedicated outdoor air system (DOAS) with costs driven by system size, efficiency, ductwork, and installation complexity. The price also depends on whether the DOAS is integrated with an existing HVAC system or installed as a standalone upgrade. This guide provides cost ranges in USD and practical pricing details to help budgeting and planning.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Equipment (DOAS unit) | $6,000 | $9,500 | $16,000 | Includes cooling/heating coil, heat recovery, and control module |
| Installation & Labor | $3,500 | $7,000 | $12,000 | Depend on house size, ductwork, and labor rates |
| Ductwork & Air Distribution | $2,500 | $5,000 | $9,000 | New runs or rework; includes diffusers |
| Controls & Retrofit Wiring | $800 | $2,000 | $4,000 | Smart thermostats or building management integration |
| Permits & Fees | $100 | $750 | $2,000 | Local code and permit costs |
| Delivery & Logistics | $200 | $600 | $1,500 | Regional availability impacts cost |
| Warranty & Contingency | $300 | $1,000 | $2,500 | Manufacturer warranty plus contractor contingency |
Overview Of Costs
DOAS pricing combines equipment plus installation, with per-unit ranges that reflect capacity, efficiency, and integration work. Typical projects span a broad band because unit tonnage, outside air handling requirements, and existing AHU compatibility vary widely. Assumptions: residential or light commercial size, standard ductwork, and no major structural changes. A DOAS with energy recovery and economizer features generally sits at the higher end of the range. Assumptions: region, specs, labor hours.
Cost Breakdown
The following table outlines major cost components and their typical ranges. The totals above assume mid-range efficiency and standard installation complexity.
| Component | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $6,000 | $9,000 | $15,000 | DOAS unit plus coils and filters |
| Labor | $3,500 | $7,000 | $12,000 | Installs, testing, balancing |
| Equipment | $2,500 | $5,000 | $9,000 | Fans, heat exchangers, ERV/HRV |
| Permits | $100 | $750 | $2,000 | Local compliance costs |
| Delivery/Disposal | $200 | $600 | $1,500 | Logistics and packaging disposal |
| Warranty & Overhead | $300 | $1,000 | $2,500 | Contractor margin and coverage |
What Drives Price
System size, efficiency, and integration level are primary price drivers. A larger DOAS capacity or higher-performance energy recovery ventilator (ERV) features raise both equipment and labor costs. Other drivers include duct routing complexity, building enclosure, and the need for retrofit wiring or building management integration. SEER/AFUE targets, compressor types, and static pressure requirements also affect pricing.
Pricing Variables
Price varies by region and project specifics. Major variables include outdoor air fraction, heating source (electric, gas), coil configurations, and the presence of demand-controlled ventilation. A DOAS paired with radiant or conventional cooling/heating can shift the balance between equipment and installation costs. Labor hours × hourly_rate forms a quick internal estimate for a mid-scale install.
Regional Price Differences
Prices differ across urban, suburban, and rural markets due to labor availability and permitting costs. In general, urban areas show higher labor rates but more streamlined permitting; rural markets may have lower unit costs but longer lead times. Urban: +10% to +20% vs. suburban averages; Rural: -5% to -15%.
Labor & Installation Time
Installation time depends on existing ductwork, building accessibility, and electrical upgrades. A typical DOAS project requires 1–2 days for simple retrofits or up to 4–5 days for complex replacements with new duct runs. Labor hours × hourly_rate is a standard estimator, with crew size commonly 2–4 workers.
Additional & Hidden Costs
Hidden or incidental costs may include temporary power, scaffold or access equipment, space for unit placement, and post-install balancing. Some jobs incur extra for structural modifications or fire-rated enclosure. Expect add-ons if roof or exterior wall work is required.
Cost Compared To Alternatives
Compared with a traditional central air system upgrade, a DOAS adds costs for outdoor air handling but may improve IAQ and energy use. If the existing system lacks dedicated outdoor air capability, DOAS may replace or augment certain sections of the current AHU. DOAS tends to be pricier upfront but can reduce long-term energy and cooling penalties.
Real-World Pricing Examples
Three scenario cards illustrate typical choices and budgets. These snapshots blend common configurations with current market ranges. Assumptions: mid-size home, standard ductwork, balanced load.
Basic Scenario
Specs: 1.5–2 tons, basic ERV, limited duct rerouting. Labor 1–2 days. Total: $9,000-$12,000. Per unit: $6,000-$8,000 equipment, $2,500-$3,500 labor.
Mid-Range Scenario
Specs: 2.5–3 tons, energy recovery, moderate duct rework, smart controls. Labor 3–4 days. Total: $15,000-$22,000. Per unit: $9,000-$12,000 equipment, $4,000-$6,000 labor.
Premium Scenario
Specs: 4–5 tons, high-efficiency ERV, full building management integration, extensive ductwork. Labor 4–6 days. Total: $28,000-$40,000. Per unit: $14,000-$20,000 equipment, $8,000-$12,000 labor.