2800w Electric Phoenix Greenhouse Heater - PHX.

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Most Recent Customer Reviews (5 out of 5)

The heater was surprisingly large but very impressive and obviously well made. Has worked fautlessly over the last month in my greenhouse maintaining a steady frost free temperature. The fan which is not exactly quiet can be set to run continuosly to ensure a good airflow. I trust the fan bearings are up to it. So far so good.

Reviewed By David from OXON Review Date 06 January 2012

(5 out of 5)

I am using it to heat a 25 x 17.5 feet Janssen professional greenhouse in which I have a covered heated endless swimming pool. The greenhouse has bubble wrap insulation for the winter. Before I had the heater the night air temperature was falling to zero C when the external temperature was around -5C. I have only been using it a short while now and its not been the coldest winter (even on the Pennines) but the heater has been doing an excellent job. It is very quiet when running. It was easy to set the thermostat to achieve the level I wanted which is for the air temperature not to drop below 10C. I wondered if given the size of my greenhouse the heater would struggle but it seems to have achieved this easily using the 2.8KW setting with the thermostat set at 4.5. It does not seem to have had to run for lengthy periods to maintain the temperature. The heat it produces is deceptive as the air does not seem particulary hot as it comes out but the overall temperature soon rises and you don't seem to get the peaks and troughs of some fan heaters. I have the min-max thermometer at the opposite end of the greenhouse from the heater. Both are at floor level. So the heat distribution really does seem very good. I would definitely recommend it even in bigger greenhouses than suggested by the manufacturers.

Reviewed By Celia from Sowerby Bridge Review Date 03 January 2012

(4 out of 5)

Not really had very cold weather to fully test the heater but it has kept the greenhouse frost free so far when set to 1.8kw. The fan is quiet and it seems to be good at controlling the temperature without constantly switching on and off.

Reviewed By Huw from Malmesbury Review Date 01 December 2011

(5 out of 5)

The heater is robust, efficient and is currently working extremely well in my greenhouse.

Reviewed By Patricia from Craven Arms Review Date 08 November 2011

(5 out of 5)

Very good. Our greenhouse was kept at a stable temperature. There was much less variation in temperature than with our previous propane greenhouse heater. By using the 'fan only' setting during the warmer weather we kept fungal disease to a minimum.

Reviewed By Gillian from Edenbridge Review Date 24 October 2011

(5 out of 5)

Not yet used the heating setting but the fan for circulating the air works well. Prompt delivery, will certainly use garden4less again.

Reviewed By Susan from Dorset Review Date 03 September 2011

(5 out of 5)

I used to use a gas heater and swapped to this heater just before we got the cold winter. It takes a bit of fine tuning to get the temperature to suit but it was a godsend. My tender bonsai happily went through the winter (and minus 17 degrees) and the air circulation in the hot early part of the year as been equally as good. If you are wondering whether to buy this or not then buy it - you wont be disappointed

Reviewed By Simon from York Review Date 04 July 2011

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Heating a greenhouse, the problem

To keep a greenhouse frost-free, the temperature must remain above 0°C even in the corners. If the current of air does not reach there, then the temperature on the heater has to be set really high.

However, then a large proportion of the warmth goes up into the gable of the greenhouse, where it is not needed, while the corners may still dip down to minus temperatures.

This is an unsatisfactory state of affairs, because heating energy is being wasted. In addition, there may be a significant temperature difference between when the heater switches on and off, especially with cheaper thermostats.

This means that if the thermostat has a switching differential of, for example, 6°C, then the greenhouse has to be heated up to 8°C if it is not to fall below the frost-free limit of +2°C before the heating switches on again automatically.

The Phoenix heater avoids the unnecessary heating up by keeping the switching differential to a minimum. This results in significant energy savings.

This is why we, as greenhouse specialists, have developed the Phoenix heater, which offers important advantages: High ventilation rate of up to 400m_/h. In normal circumstances, the current of air covers the entire greenhouse, (if the machine is correctly positioned). This means that the temperature difference inside the greenhouse remains small. Fungal attacks and mould formation are prevented.

Use of a high-quality thermostat with a control accuracy of ± 0.3 to 0.5°C. This keeps the temperature remarkably constant and avoids the expensive high temperature peaks.

Why have fans with a high ventilation rate?

The ventilation rate is set at about 3.5 times higher than with conventional fan heaters. There are three reasons for this:
1.Because the air is always circulating rapidly, the input temperature can be low, below 45°C. This means there is no drying of the air or of foliage even close to where the air is coming in.
2. Because of the high ventilation rate, all the air is circulated. An even temperature is achieved throughout the greenhouse and the dreaded high temperature differences (hot at the top and cold at the bottom) are prevented.
3.This keeps the heating within a reasonable temperature range and reduces drops in temperature due to heat loss to the outside.

The fan setting

By using the fan setting, all the air in the greenhouse can be circulated even in the summer season. With the windows open and the fan on, the greenhouse can be cooled down. Air circulation in the summer is also necessary for the pollination of many flowers.

The fan

Can be left on for long periods without using much energy. Low-maintenance ball bearings, metal blades, a built-in thermostat, extra anti-corrosion protection and an earth wire Ð these are the features that make this fan a durable, long term investment.

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