Standard on Every PMZ3
- BACnet-ready controls
- Factory-mounted disconnect
- Return air smoke detection
- Variable-speed blower motors
- Service lighting and GFCI outlet
Products
Multizone HVAC Systems
Schools · Office Buildings · Healthcare · Retail
Custom-engineered multizone HVAC systems built for today's commercial buildings. The PMZ provides precise zone control, energy-efficient operation, and long-term serviceability in a factory-built solution tailored to your project.
Standard equipment
Standard Features
Included With Every Project
- Site visit before fabrication
- Custom unit configuration
- Installation oversight
- Startup assistance
- Owner training
Applications
Where multizone HVAC works best
PMZ3 units are built for one- to three-story commercial buildings that require independent zone control. Every PMZ3 is custom-configured to match your building's layout, structural constraints, and equipment requirements.
-
K-12 schools and universities
Classrooms, admin wings, and tech centers with different schedules and load profiles on the same roof.
-
Healthcare and clinics
Exam rooms, labs, and support spaces that cannot tolerate long HVAC outages during retrofit.
-
Office and municipal buildings
Multi-tenant floors where each zone needs its own setpoint without a full mechanical rip-out.
-
Retail and mixed-use
Storefront zones, stockrooms, and common areas with different heating and cooling demand.
Why PMZ3
The Modern Evolution of Multizone HVAC
Traditional hot deck/cold deck multizone systems maintain separate heated and cooled air streams, then blend them to satisfy each zone. That approach often wastes energy by heating and cooling air at the same time. CME PMZ3 multizone units deliver dedicated zone temperature control without relying on mixed hot and cold air, helping reduce energy consumption while maintaining occupant comfort and compatibility with modern BACnet building controls.
Capacity range
PMZ3 multizone HVAC size chart
5 to 45 tons and 1 to 18 zones depending on unit configuration. Your CME sales rep confirms exact multizone HVAC sizing for your application.
Configure your unit
Structural and operational options
Equipment Configurations
- Gas/DX
- All electric
- Dual fuel
- Hot water/chilled water
*Any combination of these configurations is available for your project.
Structural
- Curb riser and zone head extensions
- Duct connections for horizontal discharge
- Adjustable gas line and condensate line locations
- Re-configurable door locations
- Adjustable condenser locations
Operational
- CO2 control by space or return
- Humidity control by space or return
- Bipolar ionization and UVC lights
- Supply air smoke detection
- Exhaust fans and condensation neutralization kits
- High altitude and low ambient kits
- Title 24 compliant FDD economizers (California)
At a glance
Built for your job site
5 to 45 tons, 1 to 18 zones
One penthouse covers small offices through large schools. Capacity and zone count scale with your building layout, not a catalog SKU that almost fits.
Pre-piped, pre-tested, faster startup
Major components arrive ready for connection. Less time on the roof tying in refrigerant and controls means less downtime for buildings that cannot stay offline long.
Field visit before we cut steel
A CME technician visits your site before manufacturing to take measurements and confirm requirements. That visit is how we catch curb, duct, and access issues before the unit ships.
Case Study
40.7% measured energy reduction after a multizone retrofit
In Summer 2022, Canyon High School upgraded to CME PMZ multizone systems. Three years of utility data show improved zone-level control, no more simultaneous heating and cooling, and consumption trending down year over year. Post-retrofit utility data documented the savings below.
40.7%
Measured Energy Reduction
$146,188
annual energy cost savings
1,274,206
kWh less per year
Source: Canyon High School
Why CME
Why contractors choose CME multizone HVAC
Each penthouse holds multiple split systems with independent economizers, fans, cooling coils, and heating sections per zone, so you stop mixing hot and cold air in shared ducts and paying to reheat cooled air. Standard BACnet controls and conventional refrigerant circuits mean your service contractor can maintain the unit without a factory-only truck roll. CME stays on the job from spec to startup: submittals, fabrication, install oversight, and training on the roof.
36+
Years building multizone HVAC
FAQ
Multizone HVAC questions
Answers for contractors, specifying engineers, and facility owners.
What is a multizone HVAC system?
A multizone HVAC system delivers heating and cooling to multiple areas of one building from a shared rooftop unit. CME builds PMZ3 penthouse multizone units with independent zones so each space is conditioned without mixing hot and cold air in the same duct.
How is CME multizone HVAC different from hot deck and cold deck?
Hot deck and cold deck systems mix heated and cooled air to reach setpoint, which wastes energy. CME multizone HVAC uses separate heating and cooling sections per zone inside one penthouse, so you stop paying to reheat air you already cooled.
What building types use PMZ3 multizone HVAC?
Schools, healthcare facilities, offices, and retail buildings from one to three stories are the most common applications. Units are custom sized from 5 to 45 tons with 1 to 18 zones.
Does CME visit the job site before building the unit?
Yes. A field technician measures the rooftop and confirms curb, duct, and electrical layout before fabrication begins. CME also oversees installation, performs startup, and provides training on the roof.
What controls come on a CME multizone unit?
Standard equipment includes BACnet IP or MS/TP so your building automation contractor can connect to existing systems. Other protocols are available on request.
Ready to talk about your project?
Tell us what you need or call (866) 687-9803. We respond within one business day.
Certifications
Certifications & Standards
Built to the standards your inspector and owner expect, documented before the equipment ships.
