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The Complete Guide to Commercial Rooftop Units
![Commercial Rooftop Unit Guide: Types, Sizing & Costs [2026]](https://kovenair.com/wp-content/uploads/2026/07/commercial-rooftop-unit-guide-featured-2-768x512.png)
Quick Facts: Commercial Rooftop Units Typical Size Range 2 to 150+ tons (24,000 to 1,800,000+ Btu/h) Efficiency Metric IEER (Integrated Energy Efficiency Ratio), minimum set by DOE 10 CFR 431.97, tiered by capacity Standard Refrigerant (2026) A2L types such as…
The Complete Guide to RTU HVAC Systems: How Rooftop Units Work, 8 Types, and Where Heat Pump RTUs Fit
Quick Specs Typical capacity range ² tons (small retail) to ²60+ tons (large industrial) AHRI rating standard AHRI 340/360-2022 (commercial unitary equipment; residential-scale units instead use SEER) Minimum efficiency 14 IEER under ASHRAE 90.1-2022 for standard-efficiency units <135,000 Btu/h Core…
![Commercial Rooftop Unit Guide: Types, Sizing & Costs [2026]](https://kovenair.com/wp-content/uploads/2026/07/commercial-rooftop-unit-guide-featured-2-150x150.png)