High Tunnel Winter Growing Using Heat Recovery Ventilation

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By Chris Lent, NCAT Agriculture Specialist

Published: September 2016

Updated: n/a

© NCAT

IP523

12 pages


Introduction

Controlling humidity and temperature in high tunnels during the winter is challenging for farmers. This publication describes a trial of a heat recovery ventilation (HRV) system as an alternative to traditional open-air ventilation in winter high tunnel production. The project was funded by a Northeast Sustainable Agriculture Research and Education (NESARE) Partnership Grant to the National Center for Appropriate Technology (NCAT), in collaboration with New Morning Farm. This publication describes the installation of the heat recovery equipment and provides an analysis of data on humidity and temperature in the winter growing tunnels used in the project. Harvest records from the 2015-2016 winter growing season and energy usage data were used to determine what impact, if any, the ventilation system had on profitability of the winter-grown crops.

Table of Contents

Introduction
What is a Heat Recovery Ventilator?
Sizing the HRV
Installation (Photo Guide)
Project Description and Analysis
Crops
Energy Use
Conclusions, Observations, and Recommendations
References
Further Resources

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This page was last updated on: November 1, 2018