These units are best designed for farm shops and similar structures. Newer units are generally more efficient than those designed several years ago. In the field, use no-till planting to reduce the number of trips over a field, thus saving fuel. Look for ways to get the most efficiency from nitrogen fertilizer, such as planting legumes to supply nitrogen and testing soil to determine plant needs. Apply fertilizer at optimum times for plant use, and apply weed control chemicals when weeds are small.
Safety is an important issue with heating equipment.
Don't try to adjust regulators on gas tanks or make potentially dangerous repairs yourself. Contact the gas company or utility for help. Recommendations on this web site do not endorse any commercial products or trade names.