Optimized air delivered with controlled efficiency for greenhouse cooling and heating

Greenhouse Cooling and Heating: Hydronic 4-Pipe HVACD System

Prospiant’s proprietary hydronic 4-pipe HVACD system provides unparalleled environmental control and energy efficiency for cultivation in sealed greenhouses and indoor grow environments.

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Hydroponic 4-Pipe HVACD System outside view
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Description

Cost-Effective Environmental Control for Greenhouse Cooling

In a competitive marketplace, it’s critical to save money and use resources efficiently.

The Hydronic 4-Pipe HVACD’s economizer mode allows you to save energy by tapping into outdoor conditions to deliver filtered, cooled, and dehumidified air.

The optional boiler flue CO2 system provides free CO2 grow zone enrichment while you get efficient greenhouse cooling and heating.

Highlights

  • Modulate chilled and hot water mixing valves at precise load levels to balance greenhouse cooling, heating, and dehumidification.
  • Dehumidification mode managed by the same air handler unit operating cooling and heating. Simultaneously, chilled water coils cool and dehumidify air while hot water coils reheat air back to neutral temperatures.
  • Option for multiple shared chillers, boilers, and pumps ensures uninterrupted operation and reliable redundancy.
  • Multiple air-handler fans guarantee continuous airflow.
  • Built-in outdoor air intake doubles as a fresh air supply and emergency exhaust.
  • Air handler consistently dehumidifies with precise chilled water control, reducing energy consumption by 10%.
  • High-efficiency condensing boilers use 15% less energy for the same heat output as conventional gas unit heaters.
  • Turn off the chilled water system and utilize outdoor air during cooler months of the year, for up to 35% electricity savings annually.

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Infographic showing flow of HVAC system to various cooling components.

In maturing markets, with wholesale prices dropping, you need to control your OPEX without compromising flower quality. A sealed, environmentally controlled greenhouse delivers similar temperatures and humidity levels to an indoor grow, with the bonus of free full-spectrum sunlight.

A greenhouse with full-spectrum natural lighting, designed for 80°F and at 55% humidity, uses 47% less energy costs than an indoor grow with HPS lights employing a conventional HVACD system for greenhouse cooling and heating. You gain a huge market advantage!

Energy Savings Comparison: Indoor Grow vs. Greenhouse Grow

Monthly energy costs for a greenhouse cannabis grow using Prospiant's HVACD system. Monthly energy costs for an indoor cannabis grow using Prospiant's HVACD system.

*Calculations based on 25,000 sf scenario in Midwest, maintaining 35 DLI lighting with HPS lights
**Costs based on $0.10/kWh for electric and $13.00/1,000 ft3 for natural gas

Schematic drawing of Prospiant's proprietary HVACD 4-pipe HVACD system.

System Components

The Prospiant Hydronic 4-Pipe HVACD Greenhouse Cooling and Heating System includes:

Outdoor-mounted Air Handlers: One for each grow space, featuring dual heating and cooling coils, controlled by two chilled and two hot water pipes.

Efficient Ducting: Air handlers duct into the grow space through the end gable wall, directly distributing conditioned air beneath benches to the plants via perforated flexible ducting.

Commercial Brochure

Commercial Brochure

Overview of our offerings for commercial growing.

Retail Brochure

Retail Brochure

Overview of our greenhouse offering for garden center retailers

Produce Brochure

Produce Brochure

Overview of our greenhouse offering for produce growers.