So I bought a table fireplace for that I had brought bioethanol and it has about 20 minutes without burning stench Dan it was made! Dan I had times of recession here and find here some also use the gel, my brother also told me to take the gel burns länger.Also I opted for the gel and my opinion is indeed burning 1 hr but the compartments where the gel is a filled are really black at the end it smells totally burned and the gel is totally burned! Just do not understand why the fireplace cooking as long burn my brother in law has a wall with a fireplace as a sponge and burns about 4 hours! Do not know what I can bring it burns longer