Sturdy-based & Reliable Heater Ideal For Bringing On Young Plants In A Cold Frame Or Greenhouse Up To 5 Square Metres (54 Square Feet), Or As An Anti-frost Heater In A Larger Structure.convects Heat For A Greenhouse Up To 2 X 2 ½ M (6 X 8 Ft) To Really Bring On Crops, Or Acts As Anti-frost Heater In A Larger Space.fill The Tank With Fuel & Your Greenhouse Or Coldframe Will Get 3 & A Half Days Of Continuous Burning Time.it’s Amazing How Much Your Crops Will Flower & Fruit For Generous Harvests Later On, With Just A Little Extra Ambient Heat.capacity: 4.5 Litres