How effective is Vintage Air in the Blazer?

[cleszkie]

My Vintage Air system blows good and cold in the summer and blows hot in the winter. However, this only applies to the driver and passenger. Anyone in the back seat gets much less of the benefit. I have considered plumbing my center vent to a duct that outlets in the rear. However, I currently have a 5000 BTU window A/C mounted in my slide in camper that I can run off a generator while I drive, so the duct modification has gone to the back burner.

It should be noted that the effectiveness of the A/C and heat will be greatly improved if you properly insulate your truck. I added fat mat everywhere inside the tub and doors, carpeting over that, and heat shields on the firewall inside the engine bay and tranny tunnel, and between the muffler and floor. This has helped a lot.