For mechanical contractors, specifying engineers, and facility managers
Our PMZ3 multizone system conditions each zone on its own. It does not reheat air you already cooled. That waste is what drives up cost on old hot deck and cold deck units. We have built custom equipment in Ponca City, Oklahoma for 36 years. Our team stays with you from spec through startup.
Toll Free: (866) 687-9803
1,000+
Installations Nationwide
Schools, healthcare, retail, and buildings that run around the clock
36 Years
In Multizone HVAC
Same family ownership. Spec support you can call back.
22.3%
Measured Energy Reduction
Documented on a Kansas school district retrofit
Field-Sized
Before We Build
Site visit and measurements. Not catalog dimensions.
Open
Service Access
Standard commercial parts. Qualified technicians can maintain the equipment without factory-only contracts.
Here is why catalog equipment often costs more:
Old multizone units mix heated and cooled air in the same duct. You pay to cool air you already paid to heat. Rooftop units off the shelf rarely match your curb, zones, or electrical layout. When one fails in a building that cannot shut down, every hour counts. Retrofitting a worn penthouse or specifying HVAC for a new commercial build? Generic gear is often the priciest option on the table.
Let's break it down. HVAC, screening, electrical enclosures, and custom metalwork, all built in-house to your drawings, not pulled from a catalog.
Custom penthouse multizone systems with independent heating and cooling per zone. No mechanical reheat of cooled air. Lower operating cost than traditional multizone and hot deck/cold deck replacements, with BACnet controls and field-verified dimensions before fabrication.
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Architectural screening for rooftop units, chillers, cooling towers, and heat pumps, built to your elevation, wind load, and aesthetic requirements. Keeps equipment accessible for service while meeting code and design intent on visible roofs.
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Custom electrical enclosures sized and laid out for the gear on your one-line, not a standard box with field modifications. Factory wiring options cut install time and inspection risk on commercial and industrial projects.
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Enclosures for lithium ESS and backup power applications, built to site-specific capacity, ventilation, and access requirements. Fabricated alongside our HVAC and electrical work for one accountable supplier on complex rooftops and pads.
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General custom metal enclosures for commercial HVAC, oil and gas, and renewable projects when the scope does not fit a standard product line. From concept drawings through powder coat, one shop, one project manager.
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Control racks and skids for well sites and midstream pump houses, laid out for your instruments, panels, and field wiring. Built for outdoor duty and truck access, not adapted from indoor electrical stock.
Learn More →What matters when the unit has to fit, run well, and stay serviceable for twenty years.
Every PMZ and enclosure is sized from field measurements and your zone layout, not a catalog model stretched to fit. We coordinate with your engineer and contractor before steel is cut, so curb height, duct connections, and electrical feeds match what is on your drawings.
Traditional multizone systems mix hot and cold air to hit setpoint. You pay twice for the same Btu. CME zones operate independently, so you are not mechanically reheating air you already cooled. That is the difference owners see on utility bills after retrofit.
Equipment built to the standards your project requires: Energy Star, UL, AGA, CGA, and ARI 240 where applicable. Submittals and shop drawings support the inspection path, not a fight over what was actually shipped.
Engineering support during design, coordination through fabrication, and field presence at install and startup. When schedules tighten, you talk to people who built the unit, not a call center reading a ticket.
Components are standard commercial HVAC and electrical parts: variable-speed blowers, BACnet controls, conventional refrigerant circuits. Your service contractor is not locked into factory-only maintenance contracts to keep the warranty valid.
Case Study
Olathe School District · Technology Support Center, Kansas
22.3%
Reduction in electricity use
$10,300
Annual utility savings
The Olathe School District Technology Support Center cannot afford long outages. CME replaced the rooftop HVAC with a custom PMZ3 sized to the building's zones. Measured results: 22.3% less electricity and $10,300 saved each year. Reliability improved for a building that has to stay online.
Read the Full Case Study →Built to the standards your project calls for. Not patched to pass inspection after the fact.
Energy Star 
AGA Certified 
CGA Approved What reps, integrators, and owners say after our equipment is in the field.
Manufacturer's rep · Commercial HVAC specification
“Working with Custom Mechanical Equipment has been straightforward from day one. Their staff answers the phone, knows the product line, and follows through on commitments. From the first inquiry to project completion, they treated our schedule like it mattered. I recommend CME to anyone who needs a mechanical partner they can count on.”
Electrical racks & skid buildings · Multi-project fabrication partner
“CME has been a steady partner for our business. We have purchased hundreds of electrical racks, more than a dozen skid mounted buildings, and many other custom fabricated items. Their ownership and employees take pride in the work. They adapt when our fabrication and electrical needs change, and they go the extra mile so we can deliver a solid product to our clients. I would recommend CME to anyone who wants a fabrication and assembly partner, not just a vendor.”
Tight schedules & equipment lead times · Rep firm partnership
“Our work with Custom Mechanical Equipment has been a strong fit for our firm. The CME team is focused on customer service and knows the equipment inside and out, which helps the end user on every job. Tight lead times and compressed schedules are part of our world, and Connor and the rest of the team help us get there. They stay committed until each project is done. I recommend them for any service they offer.”
What contractors, facility managers, and engineers ask before the first submittal.
Lead time depends on tonnage, zone count, and current shop load. Every unit is built to order. Contact us with your project schedule and we will confirm availability and a production slot. We often work with tight timelines when the field survey and approvals move quickly.
Custom-sized. A field technician visits your site before fabrication to verify dimensions, duct connections, electrical service, and access. You are not adapting a standard curb to a non-standard roof. The penthouse is built to your building and zone layout.
Any qualified commercial HVAC technician. We use standard blowers, refrigeration components, and BACnet controls, not proprietary parts that require a factory truck roll. CME provides startup training and stays available for technical questions, but you are not locked into a single service provider.
Yes. CME is based in Ponca City, Oklahoma, and serves customers nationwide. We coordinate delivery, rigging requirements, and installation support for projects across the U.S., including school, healthcare, retail, and industrial facilities.
Savings depend on application and local program rules. CME equipment has been used on projects where dual-fuel and high-efficiency incentives apply, including programs in Massachusetts, Tennessee, New York, Colorado, and Minnesota. Share your rebate requirements during spec review and we will align equipment selection and documentation with your program.
Next steps: send your schedule, preliminary tonnage, and zone count. Or call to walk through a retrofit. Our team replies within one business day with a real answer, not an auto-reply.
