2. How many BTU is the Kapsul W5 and how many sq ft does it cover? Bella March 27, 2020 14:11 Updated The Kapsul W5 is a 5,000 BTU unit designed for an optimal cooling area of 150 sq ft. Related articles 3. What size window will the W5 fit into? 5. Must I remove my window screen before installing the W5? Are you still in business? How can I buy? 6. How far will the W5 protrude from the window outside? 1. What are the dimensions of the Kapsul W5? Comments 0 comments Article is closed for comments.