Ventilation
EcoSmart™ Fires do not require any form of permanent fixture or fitting, such as a flue for ventilation, a permanent gas connection or any kind of fixed utility for fuel supply.
Denatured Ethanol is certified safe to burn indoors without venting, because its main by-products are carbon dioxide, water steam and heat.
In a house of typical construction, that is, one that is not of unusually tight construction due to heavy insulation and tight seals against air infiltration, an adequate supply of air for combustion and ventilation is provided through infiltration. However, if the heater is used in a small room where less than 5.7m³ [201.3ft³] of air space is provided for each 1000 BTU per hour of heater rating (considering the maximum burner adjustment), the door(s) to adjacent room(s) should be kept open or a window to the outside should be opened at least 25.4mm [1in] to guard against potential build up of indoor air pollution. Do not install or operate in a bathroom or any other small room.

Burner One: The room cannot be less than 70m³ [2472ft³] per burner.

Burner Two: The room cannot be less than 25m³[1000ft³] per burner.