The industry's most complete product line…

Dave Lucas
President & Co-founder
Seresco Technologies Inc.

Click image above to watch Protocol Technology Whiteboard video

NP Series Dehumidifiers - The Future of Dehumidification

Ingenious Innovation: Seresco's revolutionary NP or Protocol series, the biggest industry innovation in 20 years, is the future of dehumidification. In large pools, traditional dehumidifiers require a large refrigerant charge that is not just expensive, but also leads to system migration challenges that can impact compressor reliability.

Solves Traditional Challenges: Traditional refrigerant split systems also severely restrict in distance between the unit and its remote condenser. Our ingenious NP Series overcomes both of these issues and more, through the use of a water/glycol mix as a secondary heat exchange fluid. Moreover, our NP Series also provides superior humidity control, exceptional reliability and lower operating costs, with as little as 1/6th the traditional refrigerant charge.

High Capacity Dehumidification: For applications requiring from 100 to 1000 lbs. per hour of moisture removal or 6,800 CFM to 70,000 CFM of air handling, our NP series beats the competition hands down – in every design consideration, every time! The NP series is also designed to integrate with and provide maximize performance with the Paddock Evacuator chloramine removal system.

Recent Media Coverage of Our NP Series

Air Conditioning | Heating | Refrigeration News | Reduced Refrigerant Separates Engineers & Contractors from Competitors

Construction Canada Magazine | Specifying New Dehumidifier Technologies

Aquatics Magazine | Refrigerant Issue Heats Up


  • The ultimate in stable indoor air conditions through fully modulating reheat
  • Up to 85% less refrigerant charge - completely factory sealed
    - Compliant with ASHRAE Standards 15 and 34
    - Less refrigerant means LEEDS points
    - Less cost to install and maintain
  • Eliminates all seasonal refrigeration and oil migration issues to outdoor condenser
    - Decreased risk of compressor issues
    - Increased performance
    - Lower maintenance costs
  • Air cooled AC heat exchanger can be located far from unit
    - Heat exchanger uses PVC instead of copper
    - Simple installation with lower cost of materials and labour
  • 5% to 7% more energy efficient than DX systems
  • WebSentry® Internet monitoring and control
  • Touch screen CommandCenter® control systems
  • Premium corrosion resistance
  • Mechanical vestibule outside the air stream on all units
    - more efficient operation
    - easy to service
    - protects key components from moisture and chemicals in the air stream



Specification Sheets

The specification sheets below are a representatation of fully loaded units.


  • Pool water heating option
  • Exhaust with heat recovery
  • Purge mode with economizer
  • Air conditioning – air cooled or water cooled, split or packaged
  • Auxiliary air heating (electric, hot water, steam or gas)
  • Motorized outdoor air on/off damper tied to built-in 7-day time-clock
  • Outdoor air ventilation built-in, complete with filter and manually adjustable damper


Standard Features

  • WebSentry® Internet monitoring and control
    - Factory start-up and support via the Internet
    - Seresco Sentinel performance monitoring 24-7
    - Preventative maintenance e-mail alerts
    - Trouble warnings via e-mail
    - Browser-based access and control
    - Smart phone access and control
  • Unrivaled 1-year labor warranty with WebSentry connection
  • 2-year warranty on parts
  • CommandCenter Control System with optional touch screen interface
    - The most sophisticated and powerful controller in the industry
    - Integrated BACnet, LON and Modbus connectivity
  • Service Vestibule Outside Air Stream – On All Units
    - Critical components outside of chlorinated air stream
    - Maximum AC efficiency, no heat gain from warm components
    - Easy to service even while unit in operation
  • Direct drive fans, backward inclined airfoil plenum
    - Quiet, powerful, efficient, reliable, energy efficient
    - Higher static pressures
    - Quieter operation & greater energy efficiency
    - Allows for factory installed auxiliary air heating
    - Offers maximum flexibility for supply air duct options
    - No belts to adjust, wear out or replace
  • Fully dipped coils for 100% corrosion protection – not just the fins!
  • Extraordinary compressor protection
    - Refrigeration pressure transducers on suction and discharge – unique to Seresco
    - 24/7 monitoring of critical suction and discharge pressures
    - pump down, crankcase heater, voltage monitor
    - suction accumulator, oil separator, oil monitoring
  • Sight glasses on receivers for easy field charging of split systems
  • Multiple compressor systems for staged control
  • Flexible supply and return air openings - multiple openings also possible
  • Mechanical vestibule outside the airstream makes service a breeze
  • Mirror configurations available for all models to suit duct work requirements
  • Best cabinets in the industry
    - 2-inch insulation
    - Double wall construction, door holders
    - Rain-guards over the doors
  • Outdoor packaged and split available, air-cooled or dry cooler
  • Roof curb or slab compatible base design
  • Motorized evaporator bypass damper for proper evaporator loading and maximum efficiencies
  • 2-Inch pleated filters standard
  • Service technicians have smart phone access and control


Seresco NP Series Dehumidifer Brochure


Seresco Dehumidifiers Pool Line Brochure

Seresco’s WebSentry Brochure

NC Series / NG Series

Seresco's Natatorium Design Guide

NP Series Installation, Operation & Maintenance