The Mach I Power Saver is Coleman Mach's answer to the growing demand for low-draw rooftop cooling. At just 9 amps running current, it pairs naturally with smaller portable generators, shore power pedestals with 20-amp service, and solar-assisted setups where watt-hours matter. It delivers genuine 11,000 BTU cooling capacity -- not a theoretical peak -- while fitting the same 14 x 14-inch roof opening used by the vast majority of existing RV AC cutouts. If you are replacing an aging rooftop unit or speccing a new build where power budget is tight, this is the unit to consider.
Most RV air conditioners draw 13 to 16 amps at startup and 12 to 15 amps running. That profile locks you into a 30-amp minimum shore pedestal and a generator rated at least 3,000 watts. The Mach I Power Saver resets those requirements. Its 9-amp running draw means a 2,000-watt generator can power it, a 20-amp circuit can run it alongside other loads, and solar-plus-battery systems can sustain it for meaningful periods without constant generator cycling.
The unit uses R32 refrigerant, a next-generation HFC with a global warming potential roughly 68 percent lower than the R-410A it replaces in this product family. R32 also has higher thermodynamic efficiency, which contributes directly to the lower amperage draw. Servicing requires a certified technician with R32-compatible recovery equipment -- this is not a DIY refrigerant job -- but for most RV owners the only interaction with the refrigerant system is at initial installation and eventual retirement of the unit.
Compatible with 20-amp shore service and 2,000-watt generators. Frees up circuit capacity for other appliances.
Effective for Class B vans, pop-ups, truck campers, and smaller travel trailers up to roughly 23 feet.
Lower GWP than R-410A, higher efficiency, and compliant with tightening refrigerant regulations in the US and internationally.
Drops into the industry-standard 14 x 14-inch roof opening. No custom cutting required on most RVs built after the mid-1980s.
Coleman Mach achieves the low amp draw through a combination of a high-efficiency scroll-style compressor design, optimized coil geometry, and variable fan speeds that reduce motor load during moderate ambient conditions. The result is a unit that starts and runs on circuits that would trip a standard RV AC's breaker.
The reduced startup surge -- typically a concern with older soft-start-less units -- also means the Mach I Power Saver plays better with modified-sine-wave inverters in off-grid setups, though pure sine wave is always preferred for any compressor load. If you are running a battery-inverter system, confirm your inverter's surge capacity can handle the compressor startup before installation.
A standard RV rooftop AC typically requires a 3,000-watt or larger generator to start reliably. The Mach I Power Saver's lower startup surge allows reliable operation on quality 2,000-watt inverter generators such as the Honda EU2200i or Yamaha EF2000iSv2. This is one of the most practical advantages for boondockers and dry campers.
The 38207-0660 mounts to the standard Coleman Mach 14 x 14-inch roof opening pattern. The rooftop unit ships without a ceiling assembly -- you will need a compatible Coleman Mach ceiling assembly (control box and return air grille) purchased separately. Coleman Mach ceiling assemblies are available in standard and ducted configurations depending on your RV's interior layout.
This listing is for the rooftop condenser/evaporator unit only. A Coleman Mach ceiling assembly (also called a control box or air handler) is required to complete the system. If you are replacing an existing Coleman Mach unit, your current ceiling assembly may be reusable -- verify compatibility with the 38207-0660 before ordering a new one.
The 11,000 BTU output is well matched to smaller RV footprints. As a general guideline:
For larger rigs, consider pairing two low-draw units rather than one high-BTU unit -- the distributed cooling and redundancy often outperform a single large unit in longer rigs.