We had a choice between two air conditioner models for our Casita travel trailer. This article describes our analysis of how each of the units fits us. Spoiler alert, it depends; neither unit dominates the other for all needs and preferences.
Is it the Mach 8 Cub?
If you value the qualitative factors in the table’s left column below more than the right, you would likely be happier with the low-profile Mach 8 Cub model.
Is it the Mach 3 Plus?
The opposite is also true. If you value the ones on the right more than the left, you might like the medium-profile Mach 3+ model better.
We will be operating off-grid in remote locations including hot humid locations and high temperatures. Higher efficiency is better for off-grid operation.
We will be venturing away from the trailer and will want it to cool down quickly when we return. It is less likely a simpler model will fail in a remote location, and if it does, there is a better chance we could fix it.
The Mach 3+ strengths fits our needs better, so we chose it.
These are the qualitative factors we used for our decision. The aesthetics factor is gathered from posts in the Casita forums. The noise factor is also validated by sentiment in the groups.
I feel the Mach 3+ will be the simpler unit for me to work on from watching repair videos. The other factors are derived from the manufacturer’s specifications in the table that follows below.
|Gas mileage||Higher efficiency|
|Humidity removal||Fast trailer cool down|
|Smaller generator||Desert temperatures|
|Lower trailer height||Simpler design|
These are the manufacturer’s specifications for each model.
|Unit Model||Mach-8 cub||Mach-3+|
|Power Standard Conditions (watts)||1,270||1,400|
|Power Desert Conditions (watts)||1,550||1,695|
|Efficiency Standard (BTUH/watt)||7.24||9.64|
|Efficiency Desert (BTUH/watt)||5.94||7.96|
|Quiet model line||No||Yes|