Top 6 Best Greenhouse Heaters and Reviews
Best Greenhouse Heaters For 2017 & Reviews
To keep those tender plants warm as the temperatures, drop outside, greenhouse heaters have been created and you can get some really efficient and cost effect models now. The very first models which are still as popular today are paraffin heaters. However you now have the option of many electric models which are much easier to use and more controllable as well as gas models. These heaters help maintain the needed temperature inside the greenhouses. These heaters vary in shape and size depending on the requirements of your greenhouse. The market is full of brand names that might confuse you. To see past the brand name, you have to put in focus on the features provided. Below we will discuss further what these features mean when selecting the best greenhouse heater as well as our Top 5 Recommended greenhouse heaters.
Below is the winner of our 'Best Pick Award' which after hours of research we have determined is the best greenhouse heater for most people. Featuring an adjustable thermostat, waterproof casing and frost watch function not only it is perfect for most gardeners who have a greenhouse its also affordable making it within most peoples budgets.
The Best Greenhouse heaters Which Are Included In Our Review Are Listed Below:
Greenhouse Heater Buyers Guide
When looking to purchase a durable heater for your greenhouse you cannot falter on the quality. The specifications provided by the manufacturer are there to tell you what the unit can do. You have to be careful so as not to purchase a unit that produces more heat than required. You may end up killing the very plants you want to keep warm. Units that rip the moisture and air from the atmosphere are not suitable for some plants. Look at the crops you wish to grow and determine the best temperatures to grow them in.
Here are some of the factors to keep an eye on:
Dimensions of the greenhouse
The space that the greenhouse occupies determines the amount of power needed to warm the space. If you have an already have an insulated greenhouse you will use up less heat since the insulation keeps the heat in. A large and un-insulated green house will require more power to run. Get the dimensions of your greenhouse and measure it against the power output of the unit you want to purchase. You may need more than one unit to run your greenhouse effectively. Most greenhouse have the ability to pin 'bubble wrap' to the walls and roof, we highly recommend doing this to help make your greenhouse more efficient and lower the running costs of greenhouse heaters.
What is the Power source?
Bills are unavoidable but we can decrease the amount we spend. When it comes to heaters these are the main heat sources you are likely to run in to:
- Paraffin based - These are more of the traditional kind. They depend on paraffin to run. The advantages of these models are that they require low maintenance and their C02 emissions help plants grow healthier. If by some miracle you are able to attain paraffin at a cheap price they are quite inexpensive to run. With these, you do not have to worry about the electric bill at the end of the month or let your plants suffer when there is a blackout. Their shortcomings lie in their need to be turned off and on manually. If no one is present to regulate, the heater will keep running till the fuel runs out. The water they produce may encourage some mould, be wary of this. In general paraffin heaters are more suitable for keeping the frost out of the greenhouse rather than trying to keep the greenhouse at a consistent temperature.
- Electric heaters - The market is flooded with these. Their advantage is that their thermostats make them energy saving mechanisms. Once the required temperature is set, the thermostat stops using up the electricity until when required. For these to work properly they have to have some form of water protection. To find out if the unit is protected from moisture damage, look for IPX4 or IPX6. Therefore, no matter the amount of moisture present in the air, the unit is still functional. Under electric heaters, you will find infrared heaters, ceramic heaters, convection heaters, radiant heaters, among others. All of these depend on the different technology to produce hot air.
Those with fans make matters better. Apart from accelerated rate of warm air being propagated, the fan gets rid of excessive moisture that may encourage the growth of microorganisms. You can choose to mount these units or leave then free standing. Personally we think electric models are the best type to get as they are very easy to use and can keep the greenhouse at a consistent temperature.
- Propane heaters - As the name suggests, this uses propane gas to heat up space. The propane bottles are easily accessible therefore make it a cheap option. Just like paraffin based units, they produce a great deal of C02. As we know, the gas is important in the photosynthetic process. The only drawback is the moisture produced, it can be a cause of concern if it is left unattended. You will have to physically check and replace the propane bottles. Otherwise, the unit won’t work. They are inexpensive to run therefore may prove a worthy ally. The difficulty comes in finding models with thermostats. We found just one gas model we would recommend.
Check power rating
You will find that most units measure the output in kilowatts. You will find that these different ratings limit the space that can be heated. You will find that most basic models range from 1kw-3kw. The higher the measurement, the higher the heat of production. Measure out the area that needs to be heated and compare the rate of air flow to figure out if the coverage will be sufficient. if you have an already insulated greenhouse, there is no need to purchase a unit with high output. In general most 2KW models will be sufficient for most small greenhouses which most people have.
Consider the price
Apart from the size of your greenhouse, the price will also affect your selection. The price range will affect the features that you get access to. Basic models will provide the basic features but the quality will be lacking. Higher priced items do have better features and can handle larger spaces. Be careful so as to select the unit with the best features in that price range. You can spend less than £40 or spend over £100. This will all depend on your requirements. We found that most people who have a small green house that are smaller model priced around £40-£50 will be perfect.
TOP 6 GREENHOUSE HEATER REVIEWS
Botanico 2kw Greenhouse Heater Review
OUR BEST PICK
The Botanico Greenhouse Heater gives you 2kw of maximum output but you can opt to reduce it. You have the option to select if you want the unit to use 1kw or 2kw function. This is basically controlling the amount of heat you put forth. If you have a small scale greenhouse, then this unit would prove a great choice as you can set it to 1kw and up it to 2wk if needed making it very flexable.
A thermostat has been provided to aid in temperature control. There are units that only run on a pre-set temperature. This limits what the user is able to control. If the day comes that you need to give the plants a cool breath of air, the fan can be used to ventilate the area. You will find that the same fans aid in the distribution of hot air. The ability to propagate both hot and cool air makes this unit offer more value and is a feature most other models do not incorporate.
As we said before, units that are used in moisture rich environments need to be waterproof. Each unit that has waterproof abilities has the specification stated in its credentials. For this unit, you have a rating of 1PX4. This shows you that it is safe to use in moist environments. The unit can be depended upon to provide adequate heat without the moisture build up.
The cable provided is only 1.8m which will limit you at a certain point. If your green house is large, you may need a couple of these units. The dimensions of the unit are height 20cm by length 27cm by width 24cm making it a nice compact size that won't get in the way. The frost watch function is a great feature which heats the greenhouse just enough to keep the frost out, this is perfect for anyone who overwinters plants that don't need heat but are just frost tender and need to be kept just above freezing.
- Lightweight and sturdy.
- Build in thermostat for setting the correct temperature.
- Active frost watch function for protecting tender plants over winter.
- Waterproof rated for safety.
- Affordable price and good value for money.
- Cannot be wall mounted.
- Thermostat could be improved so you can set the exact temperature which would be better for specific plants that require a certain temperature.
The Botanico 2kw Greenhouse Heater is a very effective small heater which is perfect for small home greenhouses. It is not designed for bigger greenhouses but you could perhaps run two if needed, however were very confident that unless you do have a greenhouse on the larger size, this model would be suitable for most gardeners and be a great choice.
It is effective and can serve for a long time if well taken care of. The waterproof rating is not as high as we would like so don't tun sprinklers over it but its fine for areas that are moist which we would expect for greenhouse condition.
The unit is really light weight so it won’t be an issue trying to move it around which is probably good new for some of us mature gardeners who are not once as strong as we once were.
Joking aside we really like the 'frost watch' function that comes with this unit which is great for overwintering more tender plants such as some perennials and young potted plants.
Overall this little greenhouse heater has all the features needed, is reliable, easy to use and comes at a very affordable price. After much consideration we decided it was that good it deserved our 'Best Pick Award'. We also noticed it was one of the best selling greenhouse heaters on Amazon with over 160 reviews at the time of our review. You can't really go wrong with this model and the reviews on Amazon do further confirm our own finding.
LightHouse 915mm Eco Heat Greenhouse Heater Review
The LightHouse 915mm 135W Eco Heat Greenhouse Heater works as more of a radiator than the heater. It can raise the temperature of a small space easily be provided consistent temperatures. The tube design provides direct heat to the atmosphere without risking the health of the plants. This is mostly used for plants that are still at the growing stage and need constant and reliable heat but not alot of heat, more of frost free enviroment for tender plants or seedling.
The tube heater will not make the utility bill go higher instead, it will reduce the consumption. It only consumes 135W of power. That is not much electricity compared to some electric heaters which can use up a lot of electricity. Its probably the cheapest greenhouse heater to run we have seen, however this is mainly because it does not generate lots of instant heat like a fan style heater.
The unit is splash resistant. Meaning that whenever you decide to irrigate, the occasional splash of water that lands on the tube will not damage the unit. However it is not water proof do not intentionally place it under a water system or water over it. Ensure you place it somewhere dry.
It is a diverse product as you can choose to mount it on the wall or leave the unit free standing. Stable feet have been provided to make certain that the unit stays where it should. If you decide to mount it, you can use the screws or find a way to suspend or low down.
- ?Very cheap to run and available in 3 different lengths.
- Great for using to keep the frost out of your greenhouse.
- It is reasonably priced.
- Cannot cater to plants that need higher heat levels.
The LightHouse Eco Heat Greenhouse Heater is perfect for using more as a frost protection heater to keep the tempature a little above freezing, perfect for tender plants and seedling.
The unit is eco-friendly as it offers no emissions in return. To make matters better, it does not have the habit of consuming large amounts of electricity and in fact is probably the cheapest model to run we have seen.
The price that you pay for the tube heater is fair with the largest size still retailing at under £30. The quality of the tube is excellent, those with small spaces will enjoy the performance of this product.
The only fault we could impose was that it needs a thermostat that would let us increase the temperature. But that will be asking for too much considering the design of the heater is not really designed for this. This tube heater is at the very least dependable and durable. Great little heater.
Bio Green PAL 2.0/GB 2KW Palma Heater with Digital Thermostat Review
The Bio Green PAL 2.0/GB 2KW Palma Heater with Digital Thermostat is a marvel and probably the most reliable in terms of setting an exact temperature such as 7 degrees c. Why we say this is because you can select negative temperatures too. We meet very few heaters that allow the user to select negative temperatures, you might be think what the point in this but there are some plants that require a negative temperature to root but no to cold. This is handy for those green houses that cater to both warm weather and cold weather vegetables. You can select temperatures from - 50°C to 99°C making it ideal for probably any gardening with a greenhouse. What is does have which most other models don't is accuracy in temperature control to (+/-2 °C).
The unit has been designed to survive the conditions inside a greenhouse. The design lets the unit sit pretty even when you are irrigating. This is because it is splash proof and also comes with a splash proof rating of IPX4. No matter the levels of moisture in the greenhouse, this unit is designed to cope unlike some cheaper heaters. As we have mentioned before, its not water proof so be sure to place out of range of sprinklers etc.
The unit is designed with rubber handles and feet to make it easy to use. The handles make mobility a breeze and the feet stand to raise the unit above the ground. This is all to make sure that your space is effectively heated. The unit is not designed to heat up large spaces, rather, it is meant for small compact spaces.
The model we reviewed come with a digital thermostat that facilitates you to control the temperature accurately. The air circulation rate of 163 m3/h makes certain the warm air is properly circulated. You can go as high or as low as you want. The small display will indicate the figures as you go along with your activities. The cord length supplied of 1.9 is sufficient for most people.
The dimensions of the unit are l28cm x w19.5cm x h31.5cm which means is nice and compact so easy to fit into a small greenhouse without getting in the way.
- ?Perfect for the serous greenhouse gardeners.
- Very durable with steel outer casing.
- You can select the temperature from - 50°C to a very high 99°C using the digital thermostat.
- Splash proof making it perfect for moist setting.
- Inexpensive to run
- Designed for Greenhouses up to an impressive 39 sq ft
- Quite pricey but worth every penny.
The Bio Green PAL 2.0/GB 2KW Palma Heater is probably one of the best heater for a small greenhouse where accurate temperature control is of the most importance. The option to choose between the cold and hot air settings makes it a versatile unit to have around.
We love that it can survive water splashes and moisture levels that are available in greenhouses. The fan will make certain that the air is ventilated to prevent the growth of mould. The price is a bit high but considering the features offered it is not too bad.
This unit is recommended for small spaced greenhouses. Larger ones will need more units so as to make sure that the heat is able to sneak into a very nook and cranny.
The only real deal breaker for some will be the price, at a little over £100 its expensive compared to most other models, however it is in a different league.
If your looking for the very best in a greenhouse heater then this model is perfect and will do everything you ask of it. It will however be to expensive for most people who is why we did not name this model our 'Best Pick'. If it was not for the price of this heater, this would win our 'Best Pick' spit hands, however we take pricing seriously when recommending products and its just to expensive for most gardeners to invest in when a £40 model would do the job just fine.
CrazyGadget Large Paraffin Super Warm Heater Single Burner Review
The CrazyGadget Single Burner Large Paraffin Super Warm Heater uses paraffin to burn to generate heat. If you have an access as to where you can fetch cheap fuel, this unit will be of utmost help and is worth considering. The unit has a capacity of 5 litres which is fairly large and will give plenty of time before needing refilling.
The unit burns the fuel to remove carbon dioxide, water, among other emissions. The reason that paraffin heaters are popular is for their carbon dioxide emissions and portability being that not electric cords to worry about or gas bottles. The gas carbon dioxide is important for plant growth and promotes the photosynthesis process. The single chimney unit will burn for 80 hours before needing more fuel. This means that for 80 hours you can go about your business and return when needed without having to worry about it running our half way through the night.
The recommended dimensions for proper coverage is for 6' x 6' greenhouses. Any space larger than that will render the unit inefficient of which you would either need 2 buners or use a larger model. Tthis is no small unit, that is why it can run for so long.
- Large capacity thus will run for long (average 2-3 days).
- Portable design, no power cables to worry about.
- The C02 emissions provide stable growth.
- Affordable prices.
- Can be expensive to run if fuel is expensive.
- Has to be turned off manually.
The CrazyGadget Large Paraffin Super Warm Heater Single Burner is a large unit compared to some other paraffin models we looked at during our research. We specially like the large 5 litre capacity because it can run for around 80 hours without refilling which will give you around 2-3 days of consistent heating.
The price of this unit is not high at under £30, meaning if you find a cheap fuel source it will be inexpensive to run and will not need to worry about a electricity supply. You will have to physically turn off the unit though if you need it to stop supplying heat which is the main disadvantage of paraffin heaters.
Overall? a great way to keep your greenhouse frost free of you prefer the more traditional route and don't want to electric greenhouse heaters.
Biogreen WM-P5 Warmax Power5 Paraffin Heater Review
The Biogreen WM-P5 Warmax Power5 Paraffin Heater is a twin chimney unit and they can be run just as one or have them both lit for more heater when needed. The 4.5 litre paraffin lamp will hold enough fuel and will run for several hours before needing to refill the unit. The unit will run 16 hours but this obviously depends on how high you have the lit and whether you use one chimney or the both.
Asthe unit comes with twin chimneys, this makes certain that the heat is distributed evenly. The C02 produces will aid the seedlings to grow better. We love the twin chimneys as they will increase the coverage of which it will effectively cover around 5 m². It has a steel construction so do not expect it to rust easily.
The unit can be easily cleaned and maintained, this traditional unit will perform as expected since you can switch it off manually when the heat is enough, this is handy if you just want to have it on over night when the temperatures drop or during the day when very cold weather is forecast. Brackets have been provided so that you can bolt the unit down and prevent accidental fires.
- ?Portable, no electric supply needed.
- Twin burners for extra heat.
- Affordable price making it affordable to most gardeners.
- Inexpensive to run as long as you get paraffin at a good price.
- Lightweight durable construction.
- Can be bolted to the floor.
- ?We did note some complaints of soot being produced.
- No options for timers or thermostat.
The Biogreen WM-P5 Warmax Power5 Paraffin Heater is a twin heater. You can decide to switch both of the heaters on or decide to have one running. We do like that the unit can be bolted to the floor to make sure that there are no accidental spills.
Overall it does the job but we can't help but think that electric models with there modern technology are a much better alternative. However if you don't have your greenhouse near a electrically supply, this is a great option. We do feel the single chimney CrazyGadget heater is slightly better en though it does not have a double chimney.
Eden Gas Greenhouse Heater 2Kw Review
The Eden 2kw Gas Greenhouse Heater uses propane gas for maximum performance. The unit has a valve that you can attach a propane source such as a gas bottle which are readily available at garden centres, petrol stations and local DIY stores. You will have to manually change the source when it is depleted, usually you drop your empty bottle off at the supplier and they exchange it for a new bottle and you pay just for the gas.
The 2kw heater is very effective. It comes with a controllable thermostat that lets you change the temperature with a dial which is similar to that of a thermostat on a radiator with numbers. You will not get to set it at a precise temperature but you can manoeuver from high to low heat through the setting provided.
The unit is well made and can stand comfortably on its own. It cannot be mounted since no brackets are provided which is a shame. The unit is lightweight and that means you can move it from place to place.
The unit also has been designed with an oxygen depletion system. This will make certain that the C02 levels are high enough to support the plants as they grow. Propane heaters produce CO2 as much as the paraffin heaters. That is why it is as popular when raising seedlings in a greenhouse setting.
The dimensions of the unit are 30 x 13 x 48 cm.?
- ?Efficiently keeps the greenhouse at a consistent temperature.
- Affordable price.
- Inexpensive to run if you shop around for the best gas prices.
- Emits C02 that is good for plants.
- Contains a safety valve and piezo ignition for reliability.
- Temperature control could be improved with a more precise thermostat.
- Hose pipe is a little short.
The Eden Gas Greenhouse Heater offers excellent value for money when you take into consideration the features provided. The unit runs on propane gas which can be expensive in some areas so its worth checking prices first. If you are near a cheap source of propane gas, then you are good. The unit is of a simple construction and emits heat from one end. It is not heavy so do not expect much in terms of coverage.
The small unit will provide 2kw of output which is about right for most small greenhouses. Since the unit is well built, you can expect many years of service from it if looked after. You will find that this unit does not rust as easily since it has been given a layer of protection. We love that it provides value for money and a great model for those looking for a gas greenhouse heater.
Our Final Conclusion
Finding a good heater for your greenhouse may seem like a complicate process. What you need to remember is that the size of your greenhouse will determine the amount of power that you use. It is better if you find those that produce carbon dioxide since it will benefit your plants. The amount of power you use will affect your monthly bill so choose wisely.
An easy to maintain unit will always be beneficial to the user. The installation of thermostats makes usage easy as you are able to control the temperature. Choose wisely.
Below is a quick roundup of some of our favourite greenhouse heaters:
Our Best Pick
Botanico 2kw Greenhouse Heater
We looked at the products presented and we analysed the good and bad of each greenhouse heater. After careful consultation, we stick to the decision that the Botanico 2kw Greenhouse Heater is the best greenhouse heater for most gardeners.
The 2kw unit can warm up small places pretty quickly. The warm air is distributed evenly and fast. The waterproof protection is another thing we enjoyed together with the frost watch function. It is not that expensive to run since it has a thermostat that switches the unit off one optimum temperature are reached.
Overall an excellent greenhouse heater.
Our Best Paraffin Heater
For this title, we came to a conclusion that the CrazyGadget Large Paraffin Super Warm Heater is the best. This is because the unit will run for up to 80 hours without requiring a refill. The large unit can supply enough heat and carbon dioxide to make certain that your plants grow healthy.
If you have a cheap source of paraffin, then this unit will be inexpensive to run. If not, you may incur large bills especially if you have several units running inside a larger greenhouse. Remember to put in moisture control mechanisms that can adjust the moisture levels. High moisture levels encourage microorganisms like mould.
Our Best Gas Greenhouse Heater
It is the only unit in this review that we felt was good enough to be included in our review. The not so light unit works the same as paraffin burners. They produce carbon dioxide as part of its emissions. The gas is great at promoting plant health, especially for seedlings. The unit has only one port open to dispense the heat.
It can be trusted to run inexpensively only if you buy sufficient amounts of propane per session. And although admittedly not as expensive as some electric greenhouse heaters, it has its advantages. It’s splash resistant and offers waterproof solutions to a degree. Not such a bad bargain. If you intend on using it for extended periods we suggest you find a local propane supplier to make matters simpler.
Since greenhouses are nowhere near extinction, we have no choice but to keep up with them. The only way that we can effectively heat them is to keep up with new models that are released frequently. You will have to go over electric greenhouse heater reviews one after the other to get different perspectives. Once you have compared the prices and the features available, only then can you make an informed decision.