Content tagged "johnbartok"

Introduction to Greenhouse Efficiency and Energy Conservation

Farm Energy Updated: March 17, 2016

Greenhouses do their job most successfully using designs and siting for energy efficiency and maximum light transmission. Greenhouses must optimize crop...

Geothermal Heat for Greenhouses

Farm Energy Updated: November 17, 2015

Soil and water below ground contain a vast reservoir of thermal energy. Geothermal heating systems recover this energy and convert it to heat that can be...

Greenhouse Energy Conservation Checklist

Farm Energy Updated: November 17, 2015

High energy costs make conservation and efficient use of facilities an important part of today's greenhouse operation. New greenhouse designs, better...

Combat Higher Fuel Prices with Efficient Heating Systems

Farm Energy Updated: November 17, 2015

Heating fuel prices have been volatile over the past few years. How high they may go in the future will depend on many factors including the world fuel...

Horizontal Air Flow is Best for Greenhouse Air Circulation

Farm Energy Updated: November 17, 2015

Before Horizontal Air Flow (HAF) systems were developed, it was common to find 10°F to 15°F difference in nighttime temperature between the opposite ends of...

Fuels and Alternate Heat Sources for Commercial Greenhouses

Farm Energy Updated: October 20, 2015

Which fuel is best for heating a greenhouse? The right answer depends on price, convenience, and availability. Some fuels have more "heat per dollar" and...

Insulation Know-How

Farm Energy Updated: September 26, 2013

With volatile energy costs, a good return on investment may be obtained by adding insulation to homes, offices, farm shops and other heated buildings such as...

Step Controllers Optimize Greenhouse Energy Use

Farm Energy Updated: March 27, 2012

A step controller is an advanced electronic device that controls conditions in a greenhouse better than a mechanical thermostat and can save money in the...

Wood Heat for Greenhouses

Farm Energy Updated: March 23, 2012

 Wood is an attractive alternative fuel for greenhouse heating – it is renewable, locally produced, and usually less expensive than other fuels. While wood...

Shell Corn as a Fuel for Greenhouse Heat

Farm Energy Updated: March 23, 2012

Corn has joined the list of popular alternatives to fossil fuels. Its high heat value, ease of handling, and ready availability in some sections of the...

Root Zone Heating Systems for Greenhouses

Farm Energy Updated: March 23, 2012

Root zone heating is an effective option for greenhouses that provides heat directly to the growing media rather than heating the air of the greenhouse. This...

Natural Ventilation in High Tunnels

Farm Energy Updated: March 23, 2012

Roll-up sides and drop-down curtains are low-cost vent systems that can be installed in most high tunnels. These systems operate on the principle that heat...

High Tunnels - Low Cost Seasonal Growing Space

Farm Energy Updated: March 23, 2012

At a cost of $1 to $2 per square foot, a high tunnel can add low-cost growing space for season extension or plant protection. High tunnels also do not rely...

Greenhouse Ventilation

Farm Energy Updated: March 23, 2012

Good temperature control is vital for a productive high tunnel greenhouse, and this in turn means that the ventilation system needs to be effective and...

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.