Introduction
Once you know the required airflow for a room, the next question is always money: what will the fan, the ductwork, and the installation actually cost? Ventilation costs span an order of magnitude — a basic bathroom exhaust fan is a weekend project under a few hundred dollars, while a whole-house ERV system with new ductwork runs into the thousands. The spread comes from equipment grade, duct complexity, electrical work, and whether you hire out the labor.
Start with the airflow number first: the Ventilation Calculator converts your room dimensions and target air-change rate into the CFM and m³/h figures that determine which equipment you price. This guide breaks down typical US planning ranges for the most common ventilation projects, what drives the price up or down, and where DIY savings are real versus illusory.
What Drives Ventilation Project Cost
Five factors set the price of almost any ventilation job:
- Airflow requirement. Higher CFM means a bigger, more expensive fan or hood — and often larger ductwork.
- Equipment grade. A builder-grade bath fan and a whisper-quiet ENERGY STAR model with humidity sensing can differ by 3–5× in price for similar CFM.
- Ductwork. Replacing a fan on an existing duct run is cheap; cutting a new roof or wall penetration and running 15 feet of rigid duct is where labor costs climb.
- Electrical. A new dedicated circuit or a timer/humidity-sensor control adds material and electrician time.
- Labor and region. Contractor rates vary widely by metro area — budget 20–40% above or below the national ranges depending on your market.
The cost tables below are typical US planning ranges, including basic materials and professional installation where noted. Treat them as budgeting brackets, not quotes — get two or three local quotes before committing.
Bathroom Exhaust Fan Costs
The most common residential ventilation project. Pricing splits cleanly between a like-for-like swap and a new installation:
| Scope | Typical range (USD) | Notes |
|---|---|---|
| Fan unit only, 50–80 CFM basic | $30–$80 | Builder grade; often 3–4 sones |
| Fan unit only, 80–150 CFM quiet | $90–$250 | ≤ 1.5 sones, often ENERGY STAR |
| Fan with humidity sensor / LED | $120–$300 | Runs automatically on moisture |
| Swap on existing duct + wiring | $150–$350 | 1–2 hours labor |
| New install with new duct run | $350–$800 | Roof/wall cap, duct, wiring, patching |
A 50 CFM intermittent or 20 CFM continuous baseline covers most standard bathrooms; larger or windowless baths justify stepping up a size. The estimating guide walks through sizing each room before you price equipment.
Kitchen Range Hood Costs
Hood cost tracks CFM closely, because higher airflow needs a bigger blower, larger duct (6–8 in / 150–200 mm), and often make-up air provisions:
| Scope | Typical range (USD) | Notes |
|---|---|---|
| Under-cabinet hood, 200–400 CFM | $150–$600 | Unit only; ducted models cost more to install |
| Wall-mount chimney hood, 400–600 CFM | $400–$1,500 | Unit only |
| Professional install, existing duct | $300–$700 | Electrical + mounting |
| Professional install, new duct + make-up air | $1,000–$2,500+ | High-CFM hoods may trigger make-up air rules |
The planning rule of 100 CFM per 10,000 BTU of cooktop output sets the airflow target; the formula-explained guide shows the arithmetic. Above roughly 400 CFM, many jurisdictions require dedicated make-up air — confirm with your local authority, since that requirement can add several hundred dollars.
Whole-House Ventilation (ERV / HRV) Costs
Continuous whole-house systems sized to ASHRAE 62.2 are the premium tier:
| Scope | Typical range (USD) | Notes |
|---|---|---|
| ERV/HRV unit, 100–200 CFM | $800–$2,000 | Unit only; sized to house area + occupants |
| Installed, retrofit with new ducts | $2,500–$6,000 | Ductwork is the dominant cost |
| Installed, new construction | $2,000–$4,500 | Cheaper when ducts go in with the build |
| Central-fan-integrated ventilation | $1,500–$3,500 | Uses existing furnace/air-handler ducts |
ERVs (energy recovery ventilators) transfer both heat and moisture; HRVs (heat recovery ventilators) transfer heat only. In humid climates the ERV’s moisture transfer usually justifies its slightly higher price. Operating cost is modest — typically $50–$150 per year in electricity plus periodic filter changes.
DIY vs Hired-Labor Cost Comparison
Labor is often half the project cost, so the DIY question is really a money question. Honest brackets:
- DIY fan swap (existing duct + wiring): $30–$150 in materials; 1–3 hours. The clearest DIY win — see the DIY vs pro guide for what’s safely in scope.
- DIY new bath fan install: $80–$250 in materials; a full weekend including drywall patching. Savings of $300–$500 over hired labor, but roof penetrations and electrical work carry real risk.
- Hired ERV/HRV or high-CFM hood: labor typically $1,000–$3,000 of the total. DIY is rarely advisable — duct design, electrical, and make-up air interact in ways that punish mistakes.
Where DIY “savings” evaporate: buying the wrong size fan and re-buying, undersized duct that forces a re-run, or a failed inspection that requires rework. Size the airflow correctly first — a mis-sized purchase is the most expensive kind.
Operating Costs: The Number Nobody Budgets
Ventilation costs don’t stop at installation. A 100 CFM bath fan draws roughly 20–30 W; run an hour a day, that’s a few dollars a year. But exhaust air is conditioned air leaving the house — in heating or cooling season, a 200 CFM continuous exhaust can add $100–$300 per year in energy costs depending on climate and utility rates. ERVs and HRVs recover 60–80% of that energy, which is the economic argument for them in tight, well-insulated homes.
Maintenance is cheap but not zero: clean or replace filters quarterly to annually ($10–$40 per filter set), clean fan grilles and duct terminations yearly, and budget a fan motor replacement every 10–15 years.
Budgeting Example: Two-Bath Home Refresh
A planning-level budget for upgrading ventilation in a typical two-bathroom home, hired labor:
- Two quiet 80 CFM humidity-sensing fans: $300–$500 (units)
- Swap installation on existing ducts: $300–$600 (labor)
- Timer/humidity controls if not built in: $60–$150
- Planning total: $660–$1,250
If either bathroom needs a new duct run to the exterior, add $350–$800 per run. Venting into an attic — common in older homes — should be corrected to the exterior at the same time; it’s a moisture and mold risk, and most codes prohibit it.
Related Guides
- DIY vs Pro — which ventilation jobs are safe to do yourself.
- Ventilation Equipment Guide — what to look for when buying fans and hoods.
- Ventilation Estimating Guide — size the airflow before you price the job.
- Code Compliance — permits and requirements that affect project cost.
- Ventilation Checklist — everything to verify before you buy.
Frequently Asked Questions
How much does it cost to install a bathroom exhaust fan?
A like-for-like swap on existing ductwork typically runs $150–$350 installed; a brand-new installation with a new duct run to the exterior runs $350–$800. The fan unit itself costs $30–$300 depending on CFM, noise rating, and features.
How much does a kitchen range hood installation cost?
Expect $300–$700 for installation on an existing duct, or $1,000–$2,500+ when new ductwork and make-up air provisions are needed. The hood unit adds $150–$1,500+ depending on style and CFM.
Is an ERV worth the cost?
In tight, well-insulated homes — especially in extreme climates — an ERV’s energy recovery (60–80%) can pay back its $2,500–$6,000 installed cost over many years while delivering code-compliant whole-house ventilation. In leaky older homes, air sealing first usually beats ventilation upgrades on payback.
Does a bigger CFM fan cost more to run?
Modestly — the fan motor itself is cheap to run (tens of dollars per year). The real operating cost is the conditioned air it exhausts: continuous high-CFM exhaust can add $100–$300 per year in heating/cooling energy depending on climate.
Can I save money installing a bath fan myself?
Yes for a swap on existing wiring and duct — materials $30–$150 and a few hours. New duct penetrations, roof work, and new circuits are where DIY savings get risky; budget an electrician and roofer if either is involved.
Plan Your Budget
Ventilation projects reward sizing before spending: run your room dimensions through the Ventilation Calculator, match the CFM to equipment one size up for duct losses, then price the job against the brackets above with two or three local quotes. Remember that the cheapest fan that meets the airflow target is usually the most expensive choice in the long run — noise, durability, and energy recovery are where the real value sits.
Disclaimer: Cost ranges are typical US planning brackets and vary significantly by region, contractor, and site conditions. They are not quotes. Verify airflow targets with your local building authority and consult a licensed HVAC professional for system design and installation decisions.
