iO HVAC Controls 3-Zone ESP Zone Control Panel Kit — The ZP3-ESP-KIT is a complete 3-zone HVAC control solution from iO HVAC Controls, built around the award-winning ESP (Excess Static Pressure) technology that eliminates the need for a traditional bypass damper. Designed for single-stage, multi-stage, heat pump, and dual fuel systems, this kit provides everything needed for a professional installation right out of the box — including a zone panel, static pressure sensor, discharge temperature sensor, and a 40VA transformer.

✓ Free shipping on this item — ships from The AC Outlet.

Features & Benefits

• At the heart of the kit is the ZP3-ESP panel, which continuously monitors system static pressure via the included sensor. When pressure exceeds the setpoint, the panel intelligently modulates non-calling zone dampers just enough to relieve excess pressure — without meaningfully affecting zone temperatures. The result is a smarter, cleaner installation with no bypass hardware required.
• Supporting up to 2H/2C conventional or 3H/2C heat pump and dual fuel configurations, the ZP3-ESP-KIT offers exceptional application flexibility with features like auto changeover, first-call priority with time share, 2nd stage capacity control, purge cycle option, and adjustable high/low limits and balance points. Easy switch configuration and fused-protected inputs and outputs make setup straightforward and reliable.
• Housed in a compact ABS plastic enclosure (9.5″ H × 6.75″ W × 2.25″ D) and rated for operating temperatures from -40°F to 150°F, this panel is built for real-world HVAC environments. Backed by a 10-year warranty.
• Kit Includes: Zone Panel · Static Pressure Sensor · Discharge Temperature Sensor · 40VA Transformer
• Features:
• No Bypass Damper Required — ESP technology automatically relieves excess static pressure by modulating non-calling zone dampers, eliminating 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: 840119931808
• Dimensions (W×H×D): 9.50" × 4.25" × 12.75"
• Product Weight: 4.25 lbs