ExHale produces CO2 for a minimum of 6 months to offer a 20 to 30 per cent increase in yield. Trusted by garden enthusiasts, ExHale costs only 18 cents a day which is an investment you can make for your indoor garden with guaranteed results. ExHale is maintenance-free, produces no heat nor requires electricity. With their award-winning genetics, ExHale helps take your garden to the next level of success: healthier plants, and a better finished product. Proudly made in the USA by fellow gardeners, the staff at ExHale stand behind their products 100 per cent and think it’s time growers give their garden what it wants and needs.