Ventilation

The Bitcoin Greenhouse

Build Your Own Greenhouse

Get Instant Access

Every greenhouse needs some sort of mechanism, whether automatic or hand-operated, to allow regu-

Figure 9.06 Santa Barbara greenhouse

The standard model fiberglass greenhouse has four sets of vents and a pre-assembled Dutch door frame. The frame is top-quality California redwood. Individual parts are pre-assembled at the factory.

SANTA BARBARA GREENHOUSES

L115J Ave Acaso

Camarillo, CA 93010

Figure 9.06 Santa Barbara greenhouse

The standard model fiberglass greenhouse has four sets of vents and a pre-assembled Dutch door frame. The frame is top-quality California redwood. Individual parts are pre-assembled at the factory.

SANTA BARBARA GREENHOUSES

L115J Ave Acaso

Camarillo, CA 93010

Fiberglass Greenhouse

lation of the air through the structure. If fresh air is not taken in periodically, the old internal air can become overheated and its moisture content reduced. Greenhouses can be ventilated with either vents or fans.

Most common vents are located at the peaks on either end or along the upper portion of the roof of a greenhouse. These vents may be simple flaps, louvered windows or movable panels. They can be operated by hand or power-driven. Many automatic systems are hooked in tandem with an exhaust fan. When the temperature rises, the fan draws out the warm air and the vent opens to allow fresh air in.

Turner greenhouses

The energy efficient'Dutch design' is 14 feet wide and available with either fiberglass or polyethylene glazing (cover). It can be installed on a variety of bases: wood beam, combination wood and concrete block base, a wood and earthen base, or a concrete footing with concrete blocks or bricks. This greenhouse is large enough for almost any use. It will accommodate a 3-foot wide bench against each wall, and a 2-foot wide bench or potting table in the center (Figure 9.07).

Greenhouse Humidifier
Figure 9.07
Cinder Block Vegetable Gardens

From an aesthetic standpoint redwood is probably the best material for a home greenhouse. It blends well with residential architecture and landscaping, whereas metal frames generally distract from the appearance of a home.

There are many advantages to redwood. It is easy to insulate for winter use and transmits heat less readily than aluminum. Expansion and contraction are significant with redwood. It is extremely easy to work. Minor modifications and additions for shelves, hanging basket brackets and special vents are easy to make. Redwood does not have to be painted.

Varishading is a permanent variable greenhouse shading which transmits more light in winter than summer. Applied to the interior of a glass or plastic house, it is transparent when kept wet by winter condensation. In summer, when no condensation occurs, it is dry and opaque. The amount of varishade coating applied determines the degree of shading. When used on the outside of glass, rain will make it transparent

Contact

SOLAR SUnSTiLL, inc.

Setuket, nY 11733

Greenhouse Vent Opener

Figure 9.11 Automatic opener

Responds to inside temperatures and can be adjusted to open at any temperature from 60 to 85 degrees. Raises up to 12 pounds. Full opening is J 7 inches.

Figure 9.11 Automatic opener

Responds to inside temperatures and can be adjusted to open at any temperature from 60 to 85 degrees. Raises up to 12 pounds. Full opening is J 7 inches.

Small fans keep the air moving throughout the greenhouse and help maintain an even temperature. This prevents stagnation with accompanying mildew and other diseases.

Shade

Plants frequently receive too much intense light during the long summer days. An excess of light causes wilting and leaf burn. There are a number of ways to shade your greenhouse, involving adjustable shades made from aluminum, wood or vinyl, or a shading compound that can be applied directly to the glass surface.

Wooden shades resemble large window blinds. They can be extended and retracted by a system of ropes or pulleys. Aluminum panels are composed of slats fastened to a wooden or aluminum frame. There is also an aluminum roll-up type of cover that can be easily adjusted from the outside. Vinyl plastic shades are semitransparent and flexible, reducing light by as much as 65 percent Shading paint or shading powder (which is mixed with water) can be sprayed on the glass wall.

Cooling system

Your greenhouse will need some kind of cooling system. This may be anything from a simple hose to an evaporator swamp cooler to a refrigeration unit. A hose can be used to sprinkle water on the plants, benches and floors, cooling the area by evaporation. Humidity is not all that important a factor in the cultivation of vegetables. However, there are blowers that will put out a fine mist of water into the greenhouse from a unit measuring the humidity. This action helps to cool the area and to maintain the proper level of humidity. For larger greenhouses, an evaporator cooler that sucks air out through wet pads is a better choice. Refrigeration units are not as commonly used as they once were.

Watering system

You can water by hand with a hose (taking care of cooling at the same time) or install an automated system. One popular automatic setup consists of a flexible plastic hose with spray nozzles that can be attached along the bench. Another uses a length of plastic hose perforated with many tiny holes laid on the surface of the soil.

Instrumentation

Since most vegetables have an optimum growing temperature range from 60° to 80° F, it is important not only to keep track of the temperature in all areas of the greenhouse, but also to have the means to keep it stable within the safety range. (See Figure 6.02 on page 52 for the requirements of cool-season and warm-season vegetables.]

Thermometers placed around the greenhouse will record surprising variations in temperature. A high-low thermometer is essential to let you know what's happening in the greenhouse day and night even though you are not on the scene. It marks the high and the low points registered during a specified period of time. Another vegetable instrument is a temperature alarm, to warn you when it gets too hot or too cold in the greenhouse.

Thermostats help keep the temperature consistent by regulating the source of heat When installing a thermostat, bear in mind that is should be kept away from bright sun or from direct exposure to any other source of heat. Check your thermostat against the temperature in the greenhouse from time to time. You may find a humidistat, indicating the relative humidity, useful. Even though humidity levels are not as critical with vegetables as with most other types of plants, many greenhouse gardeners like to know what the humidity in their greenhouse is. When temperature rises, humidity should rise correspondingly, and a humidistat can be coupled with a mister or humidifier for automatic action.

HOBBY GREENHOUSE ASSOCIATION

The Hobby Greenhouse Association is a group of amateur gardeners who either own a greenhouse or who want to own one. The group puts out a newsletter The Planter, a swap center where members may exchange seeds, plants and cuttings; they have established a lending library, where members may borrow books by mail, and a film library where members may obtain instructive slides and movies ofhowto assemble an aluminum frame greenhouse. They also make available seeds and samples and other services. Dues: $5.00 a year.

HOBBY QREETittOUSE ASSOCIATIOH

Box 695-F

Watlingford, CT 06492

Janco Greenhouse

Figure 9.12 Janco freestanding greenhouses

These free-standing Janco models provide the ideal growing environment for the vegetable gardener. The entire frame is constructed of maintenance-free aluminum. Standard sizes of 24 inch glass are used throughout. Factory-sealed insulated glass is available as an optional item.

9390 Davis Ave.

Laurel, MD 20707

Figure 9.12 Janco freestanding greenhouses

These free-standing Janco models provide the ideal growing environment for the vegetable gardener. The entire frame is constructed of maintenance-free aluminum. Standard sizes of 24 inch glass are used throughout. Factory-sealed insulated glass is available as an optional item.

9390 Davis Ave.

Laurel, MD 20707

Was this article helpful?

0 0
Building Your Own Greenhouse

Building Your Own Greenhouse

You Might Just End Up Spending More Time In Planning Your Greenhouse Than Your Home Don’t Blame Us If Your Wife Gets Mad. Don't Be A Conventional Greenhouse Dreamer! Come Out Of The Mould, Build Your Own And Let Your Greenhouse Give A Better Yield Than Any Other In Town! Discover How You Can Start Your Own Greenhouse With Healthier Plants… Anytime Of The Year!

Get My Free Ebook


Responses

Post a comment