A type of construction used to house solvents in sufficiently large quantities, to qualify the space electrically as an explosion potential area. Typically the internal walls, ceiling, and floor are constructed of material strong enough to withstand a specified intensity of explosion and at least one wall has explosion relief devices that direct the explosion outwardly. In a single story arrangement, or if the explosion resistant area is on the top floor, the roof may also have devices that can be used to relieve the explosion.