Arisaig Centre

Conservatory + Greenhouse Blog


How Greenhouses Work?

DO you ever knew how Greenhouses work?

It was mostly based of glass transparency of thermal and solar infrared radiation. Through glass,  its transparent of the solar wavelengths but much thermal infrared wavelengths emitted by soil and plants inside the greenhouse. The radiation from the sun where absorbed by and heats whatever is inside the greenhouse.  The heat keeps building up by the wavelength emitted by the heated surfaces.

Why greenhouse so hot on sunny day?

The ground absorbs radiation from the heat of the sun even the greenhouse is bare of covered. Conducted by the air next to the earth, the temperature increase. Thus, when the lighter air rises allows a cooler and denser air that takes place at surface that absorbs more heat from the ground. The heated air maybe more deep or a mile since the warming spread a large mass.The mixing confined in greenhouse  as air is been trapped under the roof, so much smaller mass is to be heated.


Solar energy – installing a solar fan in your greenhouse

The pricing of energy has never been on a steeper rising curve than it is now. Switching to solar power is one of the best investments you can do. Fossil fuels will eventually run out, whilst their price will increase, but solar power will still be here in billions of years. Embrace the future today, as it has never been easier to make the switch to solar energy. Greenhouse owners often choose to add a solar-powered vent fan, which gives them a more precise measure of influence over the atmospheric status of the greenhouse. Great produce will need a good amount of sunlight, warmth, as well as humidity – all of which are controlled by such a vent fan.
Here are a few basic steps to guide you if you plan on installing one:
  1. Determine where the fan & thermostat will be placed.

    If you have a home with an attic vent fan, the thermostat will be placed either on the roof or along the sides of the attic walls. The fan itself will be automatically controlled through the thermostat. With greenhouses, the same principle applies. The fan itself must have good airflow, in and out of the greenhouse, so mark the place accordingly. Dr
    aw the outline of the fan on the surface where it will be placed.
  2. Cut the surface accordingly

    In the case of plexiglass, a plexiglass blade or jig saw will be needed in order to cut properly. If you have glass, simply remove the pane where the fan will be installed. However, if the dimensions aren’t just right (and they rarely are), you
    will need a glass cutter. Alternatively, there might be a glass shop nearby where they could cut it for you. Drill holes in each of the corners, then carefully follow the straight lines you marked earlier.
  3. Install the solar panel and the thermostat.

    If the vent fan’s solar panel is detached, you preferably want to install it in a place where it will get as much sun as possible during the day. Crossbeams are useful in securing it in place. Next up, the thermostat can also be placed on the
    crossbeam, after cutting the plexiglass (or glass). Self-tapping screws made of metal are recommended in securing these devices.
  4. Install the fan.

    Place the fan in the hole you made for it and make sure you secure it adequately with its mounting bracket. Tighten all the connections you need to make, and then replace the pane or plexiglass by using a bead of weatherproof caulk, ensuring an airtight seal.
  5. Secure the wiring

    Read the manufacturer’s instructions carefully when connecting all the necessary devices – solar panel to thermostat, to fan. Make sure they are safe from water damage and are insulated properly, as well as being fixed in their trajectory (and not hanging loosely about).

    There you have it! A solar-powered vent fan in your greenhouse is a good solution for maintaining a healthy atmosphere inside your garden. What’s more, be ready to see the electrical bills drop. Of course, the greenhouse fan is a nice experiment to see if you can make a dedicated switch over to full solar-power. It will convince you as you will notice the savings you’ll make every month. This is even more true in the summer, the long days and plentiful sun making your system work more efficiently.


new pictureThe greenhouse has been around for years supplying people with wildlife, beautiful flowers and the freshest home grown fruit, vegetables, herbs and spices available. Home-growing took off during the Second World War, when Britain faced a huge deficit for food and supplies and rations were low.

People had to start growing their own food and it became the norm for nearly everyone living in England, specifically the midlands and countryside where the soil was rich in nutrients and perfect for growing fresh fruit and vegetables.

The greenhouse then developed as English weather was extremely seasonal and people wanted the fresh food all year round. So the greenhouse was created. The idea was to create warm and consistent conditions for the plants, but more importantly its main purpose was to prevent the home-growns getting eaten by animals and bugs.

Nowadays greenhouses, which started of as a small house for a garden are used to grow food on a mass industrial scale. Thousands upon thousands of food are grown in huge greenhouses where the temperature, food and water are measured and timed to create the perfect growing conditions for the wildlife. However they are not just used for food, the greenhouse creates great conditions for exocitic plants and wildlife which can blossom inside. The Greenhouse at Kew Gardens in London are able to house some of the rarest plants, of which would not be able to survive if they weren’t in the safety of the greenhouse.