Commercial Rooftop Unit (RTU) Installation & Repair | OKC Metro | ARP Heat And Air
Packaged rooftop units up to 25 ton · All brands · Restaurants, gas stations, retail, offices · Same-day service available
ARP Heat And Air installs, replaces, and repairs commercial rooftop units (RTUs) across the Oklahoma City metro. Whether you need a 3-ton unit for a small gas station or a 20-ton unit for a large retail space, we have the experience and equipment to get the job done right — on time and on budget.
What Is a Commercial Rooftop Unit?
A commercial rooftop unit (RTU), also called a packaged unit, is a self-contained HVAC system mounted on the roof of a commercial building. Unlike split systems that have separate indoor and outdoor components, an RTU houses the compressor, condenser, evaporator, and air handler in a single cabinet on the roof.
RTUs are the dominant HVAC solution for commercial buildings in Oklahoma because they:
- Keep all mechanical components off the floor, freeing up interior space
- Are easier to service and replace than split systems in commercial settings
- Can be configured as gas/electric, heat pump, or cooling-only
- Scale from 2 ton (small office) to 25+ ton (large retail)
- Connect directly to roof curbs, making replacement straightforward
ARP specializes in RTU installation, replacement, and repair for light commercial buildings — the 2-to-25-ton range that covers the vast majority of Oklahoma City's commercial properties.
RTU Sizing Guide
2–5 ton: Small offices, gas station kiosks, small restaurants (under 2,500 sq ft)
5–10 ton: Mid-size restaurants, convenience stores, small retail (2,500–6,000 sq ft)
10–15 ton: Large restaurants, mid-size retail, churches (6,000–12,000 sq ft)
15–25 ton: Large retail, schools, multi-tenant office (12,000–25,000 sq ft)
RTU Configurations Available
Gas/Electric: Gas heat, electric cooling — most common in OKC
Electric/Electric: Heat pump or electric heat strip
Cooling Only: For buildings with separate heating systems
Heat Pump RTU: Both heating and cooling via refrigerant cycle
RTU Services ARP Provides
RTU Replacement
Full rooftop unit replacement including curb adapter if needed, new refrigerant line connections, electrical reconnection, and startup commissioning. We handle the crane rental and rigging coordination.
RTU Repair
Compressor replacement, refrigerant recharge, heat exchanger repair, economizer service, control board replacement, and all other RTU repairs. Same-day service available.
Preventive Maintenance
Bi-annual RTU maintenance including coil cleaning, filter replacement, belt inspection, electrical checks, refrigerant level verification, and detailed service reports.
New RTU Installation
New rooftop unit installation for new construction or first-time commercial HVAC. Includes load calculation, equipment selection, curb installation, ductwork connection, and commissioning.
RTU Diagnostics
Flat-rate commercial HVAC diagnostic. We identify the problem, provide a written repair estimate, and explain your options before any work begins.
Maintenance Contracts
Annual RTU maintenance contracts with priority emergency response. Protect your equipment investment and avoid costly emergency breakdowns during peak season.
RTU Brands ARP Installs & Services
ARP is not a single-brand dealer. We install and service all major commercial RTU brands and recommend equipment based on your building's specific needs, your budget, and parts availability in the OKC market.
| Brand | RTU Line | Tonnage Range | ARP Notes |
|---|---|---|---|
| Carrier | 48/50 Series | 2–25 ton | Excellent parts availability in OKC; strong warranty support |
| Trane | Precedent / Voyager | 3–25 ton | Industry-leading reliability; popular for restaurants and retail |
| Lennox | LGH/LCH Series | 2–20 ton | High efficiency options; good for energy-conscious commercial clients |
| York | ZH/ZF Series | 3–25 ton | Competitive pricing; solid commercial track record |
| Daikin | DPS/DPH Series | 2–20 ton | Strong energy efficiency; growing commercial presence in OKC |
| Rheem / Ruud | RKHA/RKNA Series | 2–20 ton | Budget-friendly option with solid reliability |
| Goodman | GPC/GPH Series | 2–5 ton | Best value for small commercial applications |
Commercial RTU Cost Guide — OKC Metro
RTU pricing varies significantly based on tonnage, brand, configuration, and installation complexity. The following ranges are typical for the Oklahoma City market as of 2025–2026. All ARP estimates are free and in writing before any work begins.
| Unit Size | Typical Application | Equipment Cost | Installed Cost (Est.) |
|---|---|---|---|
| 2–3 ton | Small office, kiosk, small restaurant | $2,500–$4,500 | $4,500–$7,000 |
| 4–5 ton | Gas station C-store, mid restaurant | $4,000–$6,500 | $6,500–$10,000 |
| 7.5–10 ton | Large restaurant, small retail | $7,000–$11,000 | $10,000–$16,000 |
| 12.5–15 ton | Mid retail, church, school wing | $10,000–$16,000 | $14,000–$22,000 |
| 17.5–25 ton | Large retail, full school, office | $15,000–$25,000+ | $20,000–$35,000+ |
* Prices are estimates for the OKC metro market. Actual cost depends on brand, configuration (gas/electric vs heat pump), curb adapter requirements, crane rental, ductwork modifications, and electrical upgrades. ARP provides free written estimates for all RTU projects.
Frequently Asked Questions — Commercial Rooftop Units
How much does a commercial rooftop unit cost in Oklahoma City?
Commercial rooftop unit (RTU) costs in OKC typically range from $4,500 to $35,000+ installed depending on tonnage, brand, and configuration. A 3–5 ton RTU for a small restaurant or gas station runs $4,500–$10,000 installed. A 15–25 ton unit for a larger retail space or school runs $20,000–$35,000+. ARP provides free written estimates for all commercial RTU projects.
How long does a commercial rooftop unit last?
A properly maintained commercial rooftop unit typically lasts 15–20 years. In Oklahoma's climate — with extreme summer heat, ice storms, and high winds — units without regular maintenance may see shorter lifespans. ARP's commercial maintenance contracts are designed to maximize RTU lifespan and catch problems before they cause failures.
Can you replace a rooftop unit without replacing the curb?
Often yes, using a curb adapter. ARP evaluates the existing curb during the estimate process. If the curb is in good condition and the new unit's footprint is compatible (or can be adapted), we can typically reuse it. This saves significant labor and cost compared to full curb replacement.
What is the largest rooftop unit ARP installs?
ARP installs commercial rooftop units up to 25 ton. This covers most light commercial applications. For industrial applications requiring larger equipment, we can refer you to appropriate contractors.