---
title: "What Is RTU (Rooftop Unit)? | Calibre Glossary"
description: "A rooftop unit is a packaged heating and cooling unit installed on a roof or outdoors that supplies conditioned air through ductwork to the spaces below."
url: https://calibre.multisites.ai/glossary/rooftop-unit
publisher: Calibre Commercial Inspections
phone: "+1-208-305-6245"
email: Schedule@CalibreCBI.com
---

Building systems

# Rooftop Unit (RTU)

A rooftop unit is a packaged heating and cooling unit installed on a roof or outdoors that supplies conditioned air through ductwork to the spaces below.

## Why it matters

RTUs are among the most common HVAC systems in retail, office and light industrial buildings. Their age, refrigerant type and condition drive near-term capital costs. Roof penetrations and curbs around RTUs are common leak points.

Source: [energy.gov](https://www.energy.gov/documents/bto-schools-rtu-replacement-083022pdf)

## Where we discuss it

-   [Boise and Treasure Valley CRE: Strong Demand, Tighter Money, Rising Costs](https://calibre.multisites.ai/cre-inspector-insights/boise-and-treasure-valley-cre-strong-demand-tighter-money-rising-costs)

## Ready for your next inspection?

Tell us about the property and your timeline. We will scope the right report and send a proposal.

[Request a proposal](https://calibre.multisites.ai/request-proposal) [(208) 305-6245](tel:+12083056245)