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How much electricity will my Grow Room use?

Not sure how much it is costing to run your grow room? Make sure you know what you’re spending by reading our simple guide to calculating your electricity costs. Also, download an electricity running costs chart for some of our more popular products.

This is a commonly asked question. The majority of electrical items supplied by GroWell Hydroponics will state either in the instructions or more often on the unit itself how many Watts are being used. For example the RVK 100 fan uses 35 Watts per hour.

As to how much this will cost you really depends on your own supplier. Most suppliers have a set charge per unit. A unit equals one-kilowatt hour, this means:

1 unit = one thousand Watts used for 1 hour

Somewhere on your bill, or available by contacting your supplier, will be how much you are paying per unit (this is usually displayed as pence per unit). These prices vary between different suppliers. Nearly all suppliers run some type of discount scheme (such as economy seven, where the hours between one a.m. and eight a.m. are slightly less than half price). Check what schemes your supplier runs and take full advantage.

So to calculate the cost of running your grow room simply work out how many Watts will be used and for how long and then multiply by your unit price. A fair average price at the moment is about 10 pence per unit (actual costs may vary - please consult your electricity supplier for an accurate unit cost). Using this average we have prepared a broad guide for a range of available equipment. This is only to be used as a rough guide and where it matters a more accurate assessment should be made.

Click here for a downloadable chart showing the running costs for a variety of our most popular products. This document is in pdf format and requires Adobe Acrobat Reader to open it. The latest version of Acrobat Reader can be downloaded from www.adobe.com


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Growell hydroponics, indoor gardening, plants supply & growing advice GroWell Hydroponics Ltd, Solihull, Birmingham, UK
Blooms Garden Centre, Kenilworth Road
Hampton-In-Arden, Solihull, B92 0LW

GroWell Hydroponics Ltd, Fulham, London, UK
1 Royal Parade, 247 Dawes Road
Fulham, London, SW6 7RE

GroWell Hydroponics Ltd, Merry Hill, Dudley, UK
Unit 52 Enterprise Trading Estate, Off Pedmore Road
Brierley Hill, Dudley, DY5 1TX

Solihull shop opening hours:
Monday-Saturday 10am-5pm
Sunday 11am-4pm
Closed Bank Holidays

Fulham shop opening hours:
Monday-Saturday 10am-5pm
Sunday 11am-4pm
Closed Bank Holidays

Merry Hill shop opening hours:
Monday-Saturday 10am-5pm
Closed Sundays & Bank Holidays

Mail Order opening hours:
Monday-Friday 9:30am-5:30pm
Saturday 10am-5pm
Sunday 11am-4pm

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