When evaluating these specialized units, prioritize Cooling Capacity (BTU); for small mosquito net enclosures, 900 to 2500 BTU is typically sufficient. Ensure the unit uses Eco-friendly Refrigerants like R134a or R290 to comply with international environmental standards. Additionally, check the Noise Level, which should ideally be below 45dB to ensure a quiet sleeping environment, and verify the Power Consumption, as many buyers seek energy-efficient models (e.g., under 300W) that can run on portable power stations or solar batteries.