Flat Roof
Select this for a flat or nearly flat roof finished with a continuous membrane such as EPDM, bitumen, or PVC.
Sale
Sale
Solar Attic Fan w/ No Pitch Flashing (2.5" high)
$705.47
$681.95
Choosing Your Roof Tile Type
Choose the option that matches the shape of the tiles or slate at the planned installation point.
High Profile Tile
Select this for pantiles, S-shaped tiles, or other raised and wavy clay or concrete tiles with noticeable ridges and troughs.
Flat Tile or Slate
Select this for flat interlocking tiles, plain tiles, or natural slate that creates a relatively even roof surface.
Solar Attic Fan · 2.5-inch no-pitch flashing
Solar-powered attic ventilation with a low roof profile.
The Solatube Solar Attic Fan uses sunlight to exhaust hot, moisture-laden air from the attic while properly sized soffit or eave vents supply replacement air.
Choose the 16W RM1500 or 33W RM2400 for the required capacity. Both use a brushless DC motor, non-corrosive five-wing fan blade, and low-profile 2.5-inch no-pitch flashing.
- 16W RM1500 or 33W RM2400
- Solar-powered daytime operation
- No household wiring required for the base fan
Confirm before ordering: This standard 2.5-inch no-pitch model is intended for compatible low- or no-pitch roof installations. It is not the dedicated 6-inch HVHZ model. Confirm roof covering, attic size, intake ventilation, solar exposure, local code, and installation requirements.
Vent heat and moisture
Help the attic stay cooler and drier year-round
Active attic ventilation supports the home by removing accumulated heat during warm weather and moisture that can collect during cooler conditions.
Powered by sunlight
The photovoltaic panel powers the fan during daylight without adding to household electrical use.
Reduce attic heat
Exhausts trapped hot air that can transfer heat into living spaces and increase the cooling load.
Manage moisture
Helps move humid attic air outdoors when adequate replacement-air ventilation is available.
Quiet operation
A brushless DC motor and lightweight polymeric blade are designed for efficient operation with low vibration.
Durable components
The photovoltaic panel and UV-stabilized housing are built for continued exterior exposure.
Low-profile roofline
The 2.5-inch no-pitch flashing keeps the fan close to the roof for a less prominent finished appearance.
Engineered airflow
Solar collection, efficient motor, and Venturi design
- Photovoltaic solar panel captures available daylight
- Brushless DC motor converts solar power into fan operation
- Five-wing, non-corrosive polymeric fan blade
- Venturi housing helps direct air through the fan
- Integrated panel and fan create a self-contained roof-mounted system
Balanced attic ventilation
How the solar attic fan moves heat and moisture
- Sunlight powers the fan. The integrated photovoltaic panel supplies energy directly to the brushless DC motor.
- Hot attic air exits near the roof. The fan pulls accumulated attic air through the roof opening and exhausts it outdoors.
- Intake vents replace the exhausted air. Properly sized soffit or eave vents allow outdoor air to enter and move through the attic.
The fan's performance depends on available sunlight, correct placement, unobstructed intake ventilation, attic configuration, and roof pitch. It does not replace the intake vents required by code.
Select fan power above
Choose RM1500 or RM2400 for the attic and climate
The product options above determine the included fan and solar-panel power. Attic size alone does not determine the right quantity; roof pitch, climate, solar exposure, and intake ventilation also affect sizing.
| Model | Solar fan wattage | Best starting point | Included flashing |
|---|---|---|---|
| RM1500 | 16W | Smaller attic zones and moderate climates | 2.5-inch no-pitch |
| RM2400 | 33W | Larger attic zones, steeper roofs, and hotter climates | 2.5-inch no-pitch |
Sizing matters: larger or steeper attic zones may require more than one fan. Confirm the installation against Solatube's sizing guidance, available intake vent area, and applicable code.
Optional controls
Choose one control strategy
The Thermal Switch and ClimaSense™ perform different control functions and must not be installed together. Select one option based on the home's ventilation goals.
Simple temperature control
Thermal Switch
Allows solar-powered fan operation when the attic is approximately 85°F or warmer and stops operation after the temperature falls below approximately 65°F.
Do not combine with ClimaSense™.
View Thermal Switch
Temperature, humidity, and night operation
ClimaSense™ Upgrade
Adds temperature and humidity sensing and can continue ventilation for up to four hours after sunset using household power. A constantly powered attic outlet is required.
Do not combine with the Thermal Switch.
View ClimaSense™Roof-mounted system
What's in the box
- Selected RM1500 or RM2400 solar fan assembly
- 2.5-inch no-pitch roof flashing
- Solar Star mounting screws
- Flashing screws
- Roof sealant
- Installation instructions
Thermal Switch, ClimaSense™, and add-on solar panels are optional accessories and are included only when purchased separately or selected with the product.
Plan the roof installation
Confirm roof fit, solar exposure, and intake ventilation
Locate the fan high on the roof and between rafters so hot attic air can exhaust efficiently. Position the solar panel for strong daylight exposure and follow the installation guide for cutting, flashing, fastening, and sealing.
- Compatible low- or no-pitch roof configuration
- Unshaded solar exposure; a south-facing location is preferred when practical
- Installation near the roof ridge and between rafters
- Net-free intake vent area of at least 1/150 of the attic floor area, or as required by local code
- Roof opening, flashing integration, fasteners, and sealant installed exactly as instructed
- Professional installation when roof work is outside the installer’s experience
High-wind regions: use the dedicated 6-inch HVHZ model where that approval is required. The standard 2.5-inch model on this page is a different configuration.
See the system
Performance and installation videos
Review how solar attic ventilation works, then watch the roof-mounted installation process.
Warranty
Solatube Solar Attic Fan components are covered for 10 years, and ClimaSense™ controller electrical components are covered for 5 years. Review the complete Solatube warranty for terms, exclusions, and claim instructions.
Related Products
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Reviews
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Free Solar Cooling
Operating on 100% solar power means zero addition to the monthly electric bill while preserving the structural integrity of the attic wood framing.
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Dramatically Cools Upstairs
The attic temperature drops noticeably when the solar panel catches direct sunlight. It pulls heat right out of the roof cavity and keeps our second floor significantly cooler.
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Whisper Quiet Thermal Relief
You can barely hear the fan running on the roof, but the temperature reduction inside the attic space is undeniable. It keeps humidity down as well.
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Solatube fan works great.
Attic's cooler, house is cooler. Energy bills should be better this month.
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Solatube is great.
After I decided to move forward the fan is quiet but powerful.I probably won’t need to cool my upstairs anymore when the temperatures drop at night, as my house collects heat in the master bedroom. Now that I can clear out the warm air in 5-7 minutes, my power bills will decrease
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It’s like a breath of fresh air!
Solatube attic fans are the best home improvement we've made.
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Solutube did a fantastic job.
Replacing our skylight and adding a solar powered attic fan.
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Finally, fresh air up there!
garage solar exhaust fan. I loved them!
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These attic fans are amazingly quiet; can't hear them at all in the house. Our A/C systems don't come on as often now. While the attic fans are expensive, the energy savings and comfort outweigh the cost!
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