There are particular things a homeowner can tackle themselves and others they cannot. I guess I can do my own oil change on a car. I can’t but, do any major repairs with the brakes or engine, then with the Heating, Ventilation plus A/C, I can change air filter, clean the fan blades and even add more freon if needed. Anything larger than that, I am stuck calling the professional. I would really appreciate to expand my skills. I know especially in ducttoil I can do some of the work; Every couple of years a homeowner should spend money for ducttoil cleaning. I have watched a duct cleaning appointment. It is not all that impressive. The Heating, Ventilation plus A/C corporation takes a crucial scrub brush and pushes it through the air vents. The Heating, Ventilation plus A/C professional just seems to assume where the brush should go and twirls it around. It is not entirely scientific or hard looking. The only thing I would need is the actual scrubbing tool. I wonder if I can fashion my own or if there is a reason Heating, Ventilation plus A/C corporations all have the same brush. There must be an online store that sells Heating, Ventilation plus A/C equipment though; Getting the ducttoil cleaning tool should be easy! Ducttoil sealing would be a little more difficult. That tool looks appreciate an airsoft gun. The gun has sealant particles in the air that it blows out. I wonder how much that tool is and how much it is to get it refilled. I appreciate the method of being able to do duct sealing anytime I want to. I would save so much money.