Get in Touch with Koven Air Company
2-Pipe vs 4-Pipe Decision Guide
Answer three questions about your building to get a directional recommendation, based on the comparison logic covered above. This is a starting point for the conversation, not a substitute for a load-based sizing review.
1. Do any zones need heating and cooling at the same time (e.g., a south-facing room and a shaded conference room, same day)?
2. What matters more for this project?
3. What best describes the building?
Recommendation
Directional fit
Answer all three questions above to see a recommendation



![Commercial Rooftop Unit Guide: Types, Sizing & Costs [2026]](https://kovenair.com/wp-content/uploads/2026/07/commercial-rooftop-unit-guide-featured-2-150x150.png)
