Solar Attic Fan Installation
A 150°F attic radiates heat into your living space all night. Solar attic fans exhaust that heat for free — powered by the same South Florida sun that created it. Cardinal installs solar-powered attic ventilation across Boca Raton, Delray Beach, Boynton Beach, West Palm Beach, and Parkland, sized to your attic volume and roof type, reducing attic temperatures up to 50°F and cutting the radiant heat load that drives your cooling bills.
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Itemized pricing by zone, back to you within the hour. No call required.
ProPink fiberglass, installed to manufacturer spec
Before-and-after infrared proof on every job
Local crews, never subcontracted
Transferable to the next owner
Solar Attic Fans for South Florida Properties
solar attic fans is the workhorse of Florida attic retrofits. We will tell you plainly when it is the right specification and when a less expensive approach delivers the same outcome.
South Florida sits in South Florida, where the recommended attic target is R-38 to R-49. That number, along with where your ductwork runs and what condition the existing assembly is in, is what determines the right specification for your property.
Solar Attic Fans at a glance
- R-value
- Up to 50°F attic temperature reduction
- Installed cost
- $900 – $2,200 installed
- Service life
- 15–25 years (panel and motor)
- Available in
- South Florida and throughout South Florida
Types and Methods
Flush-mount solar attic fan
A solar-powered fan mounted flush to the roof surface, requiring no curb or penetration flashing. The solar panel is integrated into the unit, powering the fan during peak heat. Lowest profile and easiest installation — our default for most roofs.
Curb-mount solar attic fan
A higher-capacity fan mounted on a raised curb, used for larger attics or tile roofs where flush mounting is not practical. The solar panel is adjustable for optimal sun exposure. Delivers higher CFM for oversized attic volumes.
A solar attic fan works best when the attic has adequate intake ventilation (soffit vents). If intake is insufficient, the fan can pull conditioned air from the living space. We verify ventilation balance before installing and recommend adding intake vents if needed.
Benefits for South Florida Property Owners
- Runs on free solar energy — zero operating cost, no wiring to your panel.
- Cuts attic temperatures up to 50°F, reducing radiant heat into living space.
- Extends shingle and roof-deck life by removing trapped heat and moisture.
- Lowers cooling bills by reducing the temperature delta across your ceiling.
- Solar panel mounts flush to any roof — no curb, no penetration flashing issues.
Best Applications
- Attics hitting 140°+ on summer days
- West-facing roofs that bake all afternoon
- Homes with high cooling bills and inadequate ventilation
- Attics with ductwork that suffers in extreme heat
- Roofs where extending roof life matters
How We Install It
- 1Calculate the attic volume and size the fan to the correct CFM
- 2Determine the optimal roof location for sun exposure
- 3Cut the roof opening and install the flashing or curb
- 4Mount the fan unit and seal the penetration per Florida code
- 5Wire the solar panel to the fan motor (no electrical panel connection)
- 6Verify the fan activates in sunlight and measure the airflow
- 7Document the installation and verify the attic temperature drop
Cost and R-Value Reference
Florida insulation cost & R-value reference.
Typical installed costs across South Florida by material. Pricing varies with access, square footage, and site conditions — every Cardinal quote itemizes material, R-value, installed inches, and square footage.
| Material | Installed cost | R-value / inch | Service life |
|---|---|---|---|
| Blown-in fiberglass | $1.10 – $2.00 / sq ft | R-2.2 – R-2.7 / in | 20–30 years |
| Blown-in cellulose | $1.20 – $2.40 / sq ft | R-3.2 – R-3.8 / in | 20–30 years |
| Fiberglass batts | $0.90 – $2.10 / sq ft | R-3.1 – R-3.4 / in | 25+ years |
| Mineral wool | $1.60 – $3.40 / sq ft | R-3.0 – R-4.3 / in | 50+ years |
| Open-cell spray foam | $1.50 – $3.20 / sq ft | R-3.6 – R-3.8 / in | 80+ years |
| Closed-cell spray foam | $2.40 – $4.90 / sq ft | R-6.0 – R-7.0 / in | 80+ years |
| Rigid foam board | $1.40 – $3.80 / sq ft | R-3.8 – R-6.5 / in | 50+ years |
| Radiant barrier | $0.55 – $1.90 / sq ft | Reflective (no R) | 25+ years |
| Duct sealing + R-8 wrap | $800 – $3,500 / system | R-8 (duct) | 15–25 years |
| Insulation removal | $1.10 – $2.90 / sq ft | — | One-time |
Pricing reflects typical Florida installed costs and varies with access, square footage, and site conditions. Source: U.S. Department of Energy insulation guidance, Florida Building Code R402, and IECC climate zone 1 requirements.
Pricing reflects typical Florida installed costs and varies with access, square footage and site conditions.
Solar Attic Fans FAQs
A solar attic fan installed across the corridor runs $900–$2,200 depending on unit capacity (CFM), roof type, and mounting style (flush-mount vs curb). It pays for itself in 2–4 years on cooling savings alone. Get an instant quote by ZIP.
No — solar fans run on sunlight, so they vent during peak heat when you need it most. At night, your attic naturally cools. For homes that need nighttime ventilation, we pair a solar fan with a passive ridge vent or add a backup thermostat-controlled unit.
Yes. By reducing attic temperature up to 50°F, you cut the radiant heat load on your ceiling insulation, so your AC runs less. Most South Florida homes see 10–20% cooling savings after installation, especially west-facing roofs that bake all afternoon.
Serving the Boca–Delray–Boynton corridor.
From the Boca inlet to Boynton's western estates — every hot zone below is a home we sealed this year. This is our local service area.
