The drying routine for a dog like yours. Warm the bathroom first, lukewarm water tested on your wrist, and be quick about the whole thing. Then towel hard with two or three microfibre towels, which hold far more water than ordinary ones.
Blow dry on low or cool if he tolerates it, dryer moving and held back so you do not burn him. Then check he is dry to the skin rather than dry on the surface, keep him in until he is, and give him a blanket somewhere out of the draught.