Solar Attic Fan Sizing Guide: How to Choose the Right Model Based on Roof Area
How to select a solar attic fan (DH250/DH350/DH530). This guide helps you choose the right model based on panel wattage, airflow capacity, coverage area, and installation type to match your roof size and ventilation needs. Achieve zero-cost smart ventilation.
I. Overview of Solar Vent Fan Selection
The solar ventilation fan is an eco-friendly device powered by photovoltaic panels that drives motor operation without grid connection, delivering continuous airflow at zero electricity cost. Dunhe Home currently offers three flagship models—DH250, DH350, and DH530—designed for buildings of varying sizes and ventilation needs.
Core Parameter Comparison: Models 2 & 3
DH250 Type:Equipped with a 20W solar panel and airflow of approximately 200m³/h, ideal for small spaces ranging from 10 to 20 square meters, such as bathrooms, storage rooms, or small bedrooms.
DH350 Type:Equipped with a 30W solar panel and airflow of approximately 350m³/h, this unit is designed for medium-sized spaces (20–30 m²), such as living rooms, master bedrooms, and mid-sized offices.
DH530 Model:Equipped with a 50W solar panel and airflow capacity of approximately 530m³/h, ideal for large spaces ranging from 40 to 80 square meters, such as factory workshops, large warehouses, and commercial areas.
III. Selection Recommendations
When selecting a solar ventilation fan, consider the following factors:
1. Roof Area and Installation Space:Ensure the roof has sufficient area for solar panels of the corresponding power rating. DH250 requires approximately 0.3 sqm, DH350 requires approximately 0.5 sqm, and DH530 requires approximately 0.8 sqm.
2. Ventilation Requirements:For high-moisture areas like bathrooms and kitchens, choose a model with higher exhaust capacity for better ventilation.
3. Installation Method:All three models support both roof and wall mounting; the choice depends on the building structure and usage scenario.
IV. Summary
Solar attic fans are the ideal choice for green building ventilation. Select the right model based on your roof area and ventilation needs to ensure effective airflow while achieving zero electricity costs, contributing to energy savings in your building. For professional sizing recommendations, contact our Dunhe Home technical team.