| Temperature may changes many times in a day. | | | | must be clear. |
| During the nights, it can drop to very low levels | | | | - Floor. These kinds are not mounted since they |
| which won't be healthy for all plants. Hence, to | | | | have a stand and hence can be located anywhere |
| maintain temperature at the correct level for | | | | in the greenhouse floor. The disadvantage is that |
| plant growth, generally greenhouse heaters are | | | | it takes up a lot of floor area. |
| required. For selecting the correct heater, one | | | | 3. Types Of Heater Combustion |
| must look into capability of producing correct | | | | - Open. These types of heaters make use of air |
| temperatures during cold in winter and nights, but | | | | inside for combustion needs. So long as air doesn't |
| also in the money needed to installing and hence | | | | contain contaminants, this works fine. Generally |
| run it. | | | | flammable liquids msut not be kept near the open |
| 1. Different Kinds of Heaters For Greenhouses | | | | heater since the burner isn't sealed. |
| - Electric heaters. This type of heater is suitable | | | | - Separated. The gas heater makes use of this |
| for tiny greenhouse structures. They can maintain | | | | type of combustion mechanism where it makes |
| the specified temperature levels. Also they don't | | | | use of air outside for combustion needs. The |
| produce fumes and also there is no use for | | | | burner is sealed in order to trap air outside. |
| ventilation while using these. | | | | Exhaust pipe is placed outside the this structure. |
| - Gas heaters. These heaters are run by natural | | | | - Sealed. These kinds are like the separated type. |
| or bottled gases, they are less efficient when | | | | It's burner is totally sealed in and also there isn't |
| compared to electric heaters. Waste products | | | | way use the air inside. Some sealed combustion |
| while combustion are put back in the greenhouse | | | | heaters also use direct venting for exhaust and |
| and hence ventilation is needed while using these. | | | | also intake. |
| These heaters must be located in a safe and | | | | Heater Vents |
| secure location and also need replacement and | | | | - Unvented. Unvented heaters, the combustion |
| monitoring. | | | | produced gases are released into heated location. |
| - Paraffin heaters. These are the very basic | | | | They are for temporary use due to sensitivity of |
| among all the three. These require constant wick | | | | plants. |
| trimming and replacement. They also require fuel , | | | | - Gravity. Exhausted air in this kind must rise via |
| thus, fumes enter into greenhouse and hence | | | | pipes and are released outside, hence, vents msut |
| need lot of ventilation. These also reduce the risk | | | | be vertical. Air put out has to be gotten back by |
| due to frost damage and also prove to be | | | | air outside. |
| emergency standby. | | | | - Power. The power vented ones have blowers |
| 2. Types Of Heater Mounting | | | | which push air via pipes to outside the structure. |
| - Hanging. This heater is mounted in the ceiling or | | | | These vents can be made horizontally or |
| plainly just hung down from it. It's advantageous | | | | vertically, the vent pipe is smaller and hence |
| to implement since less floor space is needed. | | | | makes it efficient. |
| They must be hung high so as not be an irritation | | | | - Direct. These kinds of venting are for sealed |
| or obstruction. | | | | combustion types. They have one vent pipe for |
| - Wall. These kinds of heaters are placed in the | | | | both exhaust and inlet ; with one pipe being inside |
| wall and also vent outside the greenhouse. Less or | | | | another. |
| no floor space is needed but the place in front | | | | |