Anyone using any of these units? We are thinking about replacing our current unit since its leaking oil before it stops working. I'm looking at Coleman Mach 3 13500 btu ($480) vs Coleman Mach 3 Power Saver 13500 btu ($630) or possibly Coleman Mach 15 15000 btu ($589). Anyone using a 15000 btu unit in their pup? Was wondering if that would be too much electric draw on our camper. Here are the specs: Mach 3 Plus - uses around 14Amps - World's best-selling RV air conditioner, with proven durability, reliability and long life. Starts easier in higher temperatures and humidity.The Coleman-Mach 3 PLUS is one of the best RV air conditioning values available. It features a large evaporator and condenser coils with raised lance fins to help dissipate heat, has a solid 13,500 nominal BTU cooling capacity, and delivers 320 CFM (cubic feet per minute) airflow. You can count on the Mach 3 PLUS for reliability. All-copper tubing and gas-flux brazed joints ensure durability and long life for your RV air conditioner. Add the optional Heater Assembly, and you.ll have 5,600 BTUs of heat for cool-weather outings. Mach 3 PS (Power Saver) - uses around 10Amps - The Mach 3 P.S. is an air conditioner designed to use less power without sacrificing cooling performance. So you can stay cool and comfortable, using the power that's left over to enjoy more of the electrical appliances in your RV. When we designed the Mach 3 P.S., we had a very high standard of performance in mind: the RV world's most popular air conditioner, our Coleman-Mach 3 PLUS. The high-efficiency Mach 3 P.S. actually out cools our Mach 3 PLUS. Mach 15 - uses around 16Amps-The Mach 15 is the world's most powerful RV air conditioner with the highest cooling output you can buy, and has an airflow so strong, it's a sure bet for ducted systems. The Mach 15 is equipped with a 1/3 hp fan motor, the largest used in an RV air conditioner, delivering cool air at an incredible 325 CFM (cubic feet per minute). The Mach 15. features the same streamlined shape that enhances the style and operational efficiency of every model in the line of Coleman-Mach RV air conditioners. Live in Florida so it does get hot on those non-shaded sites. Although we do have Popup Gizmos for both bunk ends.