What type of spray gun is best to paint a house?

What type of spray gun is best to paint a house depends on whether you mean interior walls or exterior siding, but generally an airless paint sprayer is considered best for painting a house, not HVLP or LVLP, because airless is designed for high volume, fast coverage of large areas with thick latex house paints. For exterior house painting, large walls, fences, and decks, an airless sprayer like Graco Magnum X5, X7, or Titan ControlMax 1700 is best, as it can spray unthinned latex paint directly from 5-gallon bucket at 1500 to 3000 PSI, covering hundreds of square feet quickly with adjustable tip sizes like 0.015 to 0.021 inch for even coverage, saving 50 to 75 percent time compared to rollers. For interior walls and ceilings, airless is also best for speed, but with careful masking to control overspray. For fine trim, doors, and cabinets inside house, HVLP spray gun like Wagner Flexio or Graco TrueCoat handheld is best for smooth fine finish without brush marks. HVLP and LVLP are too slow for whole house but good for detail work. So best type for painting whole house is airless sprayer for large surfaces, with HVLP for trim and cabinets. For DIY homeowner painting house once, renting airless or buying Graco Magnum X5 around 300 dollars is best value.