Vibration isolation pads and flexible line routing reduce stress at wall penetrations. Every mile of travel shakes connections — strain relief and proper support matter.
Rear hitch cargo rack: popular on skoolies and fifth-wheels — good airflow, easy service access
Bumper platform: works on trailers with rated bumpers — watch tongue weight limits
Roof bracket: saves rear overhang length — adds height and wind load; secure for highway speeds
Under-skirt enclosed bay: possible on stationary skoolies — ensure airflow clearances per manufacturer
Interior head placement
Mount the head on an interior wall with line set routed through a cabinet or closet to hide the chase. Avoid exterior walls if possible — less thermal bridging and easier insulation patch.
Keep clearance below the head for airflow return. Do not mount over the bed headboard without checking throw direction — cold draft complaints are common with poor placement.
Electrical and legal considerations
This is general DIY planning information. Follow manufacturer instructions, local codes, and refrigerant regulations in your area.
Dedicated 15–20A circuit from the breaker panel — avoid sharing with microwave on same leg
Soft-start kits reduce generator surge on startup
Some states require licensed HVAC for refrigerant work — DIY-friendly kits use pre-charged lines within length limits
Check campground rules on external mounts and noise
Frequently asked questions
Can I run a mini-split while driving?
No — shut down before travel. Condenser must be secured; line sets are not designed for on-road operation.
Pre-charged line sets vs vacuum pump install?
Pre-charged "DIY" kits with matched line length avoid brazing and vacuum if you stay within spec. Longer runs need professional charging and vacuum — do not guess.
Will a mini-split fit my RV height clearance?
Roof mounts add 12–18 inches. Hitch mounts extend rear length. Measure total height and rear overhang before buying — campground trees and ferry limits matter.
HVAC Calculators provides estimates for planning only — not professional HVAC engineering or installation advice. Verify sizing with a licensed contractor before purchasing equipment. Read disclaimer