The cost to install a solar attic fan depends on your roof and attic conditions, not just the fan itself. Projects often land in the high hundreds into the low thousands, with pricing influenced by roof pitch and material, roofline complexity, attic access, and whether any ventilation improvements are needed to support proper airflow.
The biggest cost drivers are the mounting and flashing approach, how the fan is sealed to the roof, and whether your attic has enough soffit intake ventilation to feed the airflow the fan is designed to move. Carolina Skylights can give you a reliable, home-specific estimate after a quick evaluation of roof sun exposure, existing intake and exhaust ventilation, and the best placement for your Solatube solar attic fan to perform as intended.