iO HVAC Controls 3-Zone Universal 3H/2C Zone Panel with ESP — The ZP3-ESP is a 3-zone HVAC zone control panel from iO HVAC Controls, engineered with award-winning ESP (Excess Static Pressure) technology to completely eliminate the need for a traditional bypass damper. Ideal for HVAC professionals who supply their own sensors and transformer, the ZP3-ESP delivers the same intelligent pressure management and broad system compatibility as the full kit — in a standalone panel format.

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Features & Benefits

• The ZP3-ESP continuously monitors system static pressure through a connected static pressure sensor. When pressure rises above the setpoint, the panel opens non-calling zone dampers just enough to relieve the excess — with tests showing little to no impact on zone temperatures. The result is a cleaner, more efficient zoning installation without the cost or complexity of bypass hardware.
• Compatible with single-stage, multi-stage, heat pump, and dual fuel equipment, the ZP3-ESP supports up to 2H/2C conventional or 3H/2C heat pump and dual fuel configurations. A full suite of adjustable controls and easy switch configuration make it one of the most flexible and installer-friendly panels on the market. Housed in a compact ABS plastic enclosure (9.5″ H × 6.75″ W × 2.25″ D) and rated from -40°F to 150°F, it’s built to perform in any installation environment. Backed by a 10-year warranty.
• Features:
• No Bypass Damper Required — ESP technology automatically relieves excess static pressure by modulating non-calling zone dampers, removing the need for a bypass damper entirely
• 3-Zone Universal Control — Manages up to 3 independent zones from a single panel; the smallest universal panel offered by iO HVAC Controls
• Broad Equipment Compatibility — Supports up to 2H/2C conventional or 3H/2C heat pump and dual fuel systems, including single-stage and multi-stage equipment
• Auto Changeover — Seamlessly switches between heating and cooling modes without manual intervention
• First Call Priority with Time Share — Ensures the highest-priority zone is served first, with a 20-minute time share cycle to maintain balanced comfort across all zones
• 2nd Stage Capacity Control — Optimizes system efficiency by managing second-stage equipment operation based on demand
• Purge Cycle Option — Helps clear residual conditioned air from the system for improved performance
• Adjustable High & Low Limits — Customizable discharge air temperature limits to protect equipment and maintain comfort
• Adjustable High & Low Balance Points — Fine-tune the crossover between heating and cooling stages for dual fuel and heat pump systems
• Easy Switch Configuration — Intuitive selector switches simplify system setup and reduce commissioning time
• Fused-Protected Inputs & Outputs — Dual 3-amp fuses protect both the printed circuit board and relay contacts for added reliability
• Compact, Durable Enclosure — ABS plastic housing with snap-on cover; mounts on snap track with 2 back plate screws (9.5″ H × 6.75″ W × 2.25″ D)
• Wide Operating Range — Rated from -40°F to 150°F for reliable performance in any installation environment
• 10-Year Warranty — Industry-leading coverage for long-term peace of mind

Technical Specifications

• Zones: 3
• ESP / Static Pressure Control: Yes
• System Type: Conventional, Dual Fuel, Heat Pump
• Stages: 3 Heat/2 Cool
• UPC: 840119931792
• Dimensions (W×H×D): 14.00" × 14.00" × 6.00"
• Product Weight: 5.00 lbs