A Zehnder ComfoAir 70 typically costs an estimated $2,000-$3,500 for the unit, with a professionally installed, working system often totaling $3,000-$5,500. U.S. quotes vary because availability, shipping, wall construction, electrical work, and commissioning can change the price substantially.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| ComfoAir 70 unit | $2,000 | $2,750 | $3,500 | Estimated equipment price; U.S. stock may be limited |
| Installed single unit | $3,000 | $4,250 | $5,500 | Includes typical installation and startup |
| Wall opening and sleeve | $400 | $850 | $1,500 | Higher for masonry or difficult access |
| Electrical and commissioning | $250 | $550 | $1,000 | Depends on wiring and controls required |
What a ComfoAir 70 installation usually costs
The ComfoAir 70 is a through-wall, decentralized ventilation unit with heat recovery, rather than a whole-home ducted system. Budget about $3,000-$5,500 for one unit installed in a typical room with straightforward exterior access. A second unit may cost less per unit if the contractor can share setup and mobilization, but each still needs its own wall opening and installation.
Equipment prices can be difficult to compare because U.S. sellers may quote by request or source the unit from overseas. Confirm whether the quote includes controls, wall sleeve, exterior grille, shipping, and any applicable import charges. Assumptions: one unit, standard installation height, normal access, and no major electrical or structural changes. A realistic planning figure is about $4,250 for one standard installed unit.
How wall coring, wiring, and startup shape the quote
Installation is not just the equipment price. The contractor must make a correctly sized opening through an exterior wall, fit and seal the sleeve, mount the unit, connect any required power or controls, and verify operation. Masonry, thick walls, limited access, and finished interiors can add time and materials.
| Quote item | Typical price | What changes the charge | Usually included |
|---|---|---|---|
| Equipment and accessories | $2,000-$3,500 | Availability, shipping, control options | Core unit; confirm grille and sleeve |
| Labor | $500-$1,200 | Access, crew time, finish work | Mounting and basic sealing |
| Core drilling and sleeve | $400-$1,500 | Wall material and thickness | Opening and sleeve placement |
| Electrical and commissioning | $250-$1,000 | New circuit, controls, testing | Varies by written scope |
| Delivery and disposal | $75-$400 | Distance, packaging, debris | Often billed separately |
Example: 8-12 labor hours at $75-$125 per hour equals roughly $600-$1,500 before equipment and specialty drilling. Ask for labor, wall work, electrical, and startup as separate quote lines.
How 70 m³/h airflow and wall thickness affect price
The unit’s rated airflow is approximately 70 cubic meters per hour, or about 41 cubic feet per minute. That capacity can suit a targeted room or ventilation need, but it does not automatically replace a whole-home ventilation design. A contractor should check room use, occupancy, existing exhaust, and local ventilation requirements before recommending the number of units.
Wall thickness and construction can shift installation cost. A standard wood-frame wall with clear exterior access may stay near the lower installation range. Brick, concrete, stone, or a wall thicker than about 16 inches may require specialized coring, a longer sleeve, or additional weatherproofing. A second unit increases equipment and drilling expenses even when shared setup reduces some labor.
Confirm the specified wall thickness and sleeve compatibility before ordering. If the opening needs relocation around wiring, plumbing, or structural framing, the contractor may charge for investigation and repairs in addition to the ventilation work.
What optional controls and difficult access add
Control accessories, longer shipping routes, and finish repairs can add several hundred dollars. Ask whether the quoted configuration includes the controls needed for the intended operation; do not assume that a lower equipment quote includes every accessory. Exterior lift access or work above ground level may also require extra labor or equipment.
Removal of an existing through-wall fan or vent may add about $100-$400, excluding substantial wall repair. Interior patching and painting can cost another $150-$600 when the opening or finish is damaged. These are not automatic charges, so the written quote should distinguish necessary work from optional improvements. Agree on who handles sealing and finish restoration before installation day.
Why installed prices differ across U.S. regions
Local labor and contractor availability affect the final price more than a single national rate can show. In high-cost metro areas, installed quotes may run 10%-25% above the typical range. Rural locations can be 5%-20% higher when the nearest qualified installer must travel or when the unit has to be special-ordered. These are planning adjustments, not guaranteed regional rates.
Climate and local code can also influence design recommendations, controls, and commissioning. A quote should state whether the contractor has evaluated the unit for the home’s ventilation needs and local requirements. Compare local written scopes rather than adjusting an online equipment price alone.
How long does ComfoAir 70 installation take
A straightforward single-unit job may take about 6-10 hours on site, while thick masonry, difficult access, or finish repairs can extend it to 1-2 days. A crew may include an installer and a specialist for core drilling or electrical work. Confirm whether the quoted labor covers testing and customer handoff, not only mounting.
Scheduling may take longer when the unit is imported or unavailable from a domestic distributor. Before paying a deposit, ask for an estimated delivery date, warranty terms, and the procedure for handling a damaged or incompatible shipment. Separate equipment lead time from the contractor’s installation schedule.
Is one ComfoAir 70 cheaper than ducted ventilation
A single decentralized unit can avoid the ductwork, soffits, and larger equipment required by some whole-home projects. However, one room’s unit does not necessarily provide balanced ventilation for an entire house. A small ducted heat-recovery ventilation system may cost roughly $6,000-$12,000 installed, depending on duct access and home size, while a multi-unit decentralized plan can climb as openings and equipment are added.
Compare the number of rooms served, airflow design, noise expectations, and maintenance access—not only the initial total. If the need is limited to one room, a single through-wall system may reduce construction scope. Get a ventilation design comparison before using unit price as a whole-home cost comparison.
How to reduce the installed ComfoAir 70 price
Keep the scope to the rooms that need ventilation, and request a written explanation before adding more units or controls. If multiple units are justified, ask whether installing them in one visit reduces travel and setup charges. Provide clear access to the interior and exterior work areas, and coordinate electrical work or finish repairs where that is practical.
Collect at least two itemized quotes that identify the exact model, accessories, shipping, drilling, wiring, startup, and warranty. Verify that the installer can source compatible parts and support the equipment after installation. Avoid choosing a cheaper quote if it omits the sleeve, weather sealing, or commissioning. The most reliable savings come from controlling scope and comparing equivalent installed quotes.