Are you building a homemade polyfim greenhouse, but are unsure about how to ventilate it? Here are a couple of solutions for you. You can see that this greenhouse has roll up sides, an option which is readily available, but can be costly. We have 2 options available that insert directly into your polyfilm covering without any additional framing. They use the channel base and wiggle wire to insert directly into the greenhouse covering. You simply cut the film and install these accessories directly into the film covering without any additional framing.
Intake Shutter with Solar Powered Opener
The first option is a solar powered greenhouse shutter. This has louvers and a wax cylinder powered opener. It will open when it is warm and close when it is cool automatically. They are available in 6 different sizes. If you would like to use this on another type of greenhouse such as polycarbonate, we can remove the base channel and you can insert this directly into a wood framed opening.
Solar Powered Roof Vent
The second way to do this is with a solar powered roof vent. This is a lightweight polycarbonate vent. It weighs less than 10 pounds, but you get all of the benefits of the durable polycarbonate covering. It also has the was cylinder powered opener that will automatically open and shut the vent as the temperature requires. To install this you simply cut the polyfilm and install it directly into the greenhouse covering.
A lot of people prefer to build their own greenhouses rather than purchase a kit. With these 2 ventilation options, there is no reason not to build your own polyfilm greenhouse.
Greenhouse and Indoor Garden Growing
This is an excellent article from our friends at Garden and Greenhouse magazine regarding the need for consistency in your greenhouse environment. In order to have the best, consistent growth it is important to have the best, consistent climate. Although I must say that I find this a little bit more on the advanced end of greenhouse growing. I do not suggest that someone jump in with every known greenhouse accessory when initially purchasing their greenhouse. I recommend getting a ventilation system, as it is an integral part of the building. You can retrofit them, but it is easier to install them when you are putting up your structure. A heater is also a good accessory to order with your greenhouse. As far as some of the other systems are involved, I suggest experimenting and finding out what you need rather than outlaying a bunch of money for accessories that your climate or plants may not need. Unless you are an experienced orchid grower, for example, you will know what humidity, etc your plants will need. Then it would be a wise decision to get your greenhouse set up with these systems at the beginning.
Consistency is the key to unlocking the maximum potential of an indoor garden or greenhouse. Plants thrive on consistency. Plants respond best to light energy, atmospheric conditions, and nutrients when they are kept as consistent as possible. Like people, plants burn sugars to provide energy for growth. In contrast to people, plants have the unique ability to create those sugars from sunlight. The creation and consumption of these sugars are actually part of a chemical equation. In other words, there are countless chemical reactions occurring at all times within and around the plant that contribute to healthy development.
When atmospheric conditions, lighting and nutrient levels are at optimal levels, the plant has everything it needs to make those chemical reactions happen without interruption. When the chemical reactions can occur without interruption, the plant’s growth rate is maximized. Maximizing the potential of a particular crop is the goal of just about every indoor horticulturist or greenhouse hobbyist. In order to maximize the potential of an indoor garden or hobby greenhouse, a horticulturist should closely monitor the consistency of the garden’s temperature, humidity, lighting and nutrient solution. Each of these factors has a significant effect on the chemical reactions that contribute to plant growth.
Greenhouse with Solar Powered Roof Vents and Side Vents
Of course the answer to this question is yes, you do need ventilation for your greenhouse. But what if your greenhouse is in a location with no electricity? There are several options which will alleviate this problem. The simplest thing to add is roof vents or side vents. A lot of the greenhouse kits will come with these either as standard equipment or as an option. If you are building your own greenhouse, you would just frame them out using the same material as your greenhouse and cover them with the same material as well. To simplify matters even more, I recommend using solar powered openers with these. This is an arm that is operated by a wax cylinder. It is a pretty basic piece of equipment. It functions on the principles of contraction and expansion. When it is warm the wax will expand and cause the arm to open. When it is cool the wax will contract and cause the arm to pull shut. There is no exact temperature setting on these, but there is a thumbscrew at the end which can be used to adjust the opening and closing temperatures. They are typically able to open between 65 and 75 degrees F, depending on the manufacturer. They will definitely simplify your life during the spring and fall months. No more getting up in the morning and opening them before you head out to work. Then, if you get home and forget to close them at night, the results could be devastating.
Intake Shutter with Solar Powered Opener
If you are building your own greenhouse, or need ventilation in an existing greenhouse, our solar powered shutters are perfect. They will supply natural ventilation for your greenhouse. They come in 6 sizes and require no electricity. The 4 smaller sizes may be fitted into a polyfilm greenhouse without any further framing. Or, they may be installed in a framed out opening the same as the 2 larger sizes. These shutters are perfect for just about any outbuilding, not just for greenhouses.
Polyfilm Greenhouse with Roll up Side Curtains
A final suggestion for natural ventilation is roll up side curtains. These are typically found in polyfilm greenhouses only, and come with a manual hand crank.
In conclusion, not having electricity in an area where you want to put your greenhouse should not be a deterrent. Use any of these systems, or any combination of these systems to help ventilate your greenhouse. Also, if you don’t like any of these suggestions, another way to go with this is to use solar panels to supply electricity to your motorized ventilation systems.