INSTACOOL PRO MAX
18K RV Air Conditioner with 16K Heat Pump
InstaCool Pro Max combines 18,000 BTU cooling, a 16,000 BTU heat pump and dual variable-speed motors in a rooftop system for ducted or non-ducted RVs. It is built for demanding summer travel while retaining heat-pump comfort for cooler days.
View all features ↓Fit and installation
- Roof opening
- 14.25 × 14.25 in
- Ceiling layout
- Ducted or non-ducted
- Power supply
- 115V AC / 12V DC / 60Hz
- Rated current
- 13A
- Main unit
- 33.3 × 27.9 × 14.2 in
- ADB
- 21 × 17.7 × 1.8 in
Select the ceiling assembly that matches the RV duct layout. Professional installation is recommended for rooftop lifting, sealing and 115V electrical work.
What’s included
- ✓Rooftop unitInstaCool Pro Max air conditioner
- ✓Ceiling assemblyFor the selected ducted or non-ducted variant
- ✓ControlsHandheld remote and compatible smart controls
- ✓Mounting kitGasket and standard installation hardware
- ✓Product documentationInstallation and operation manual
Package contents are shown for the selected configuration.
Specifications
- Cooling / heating
- 18,000 / 16,000 BTU
- Cooling operating range
- 63–115°F
- Heating operating range
- 28–86°F
- Temperature setting
- 61–88°F
- Fan speeds
- 4
- Indoor airflow
- 374 / 338 / 300 / 271 CFM
- Indoor sound
- 52 dB
- Power input
- 1,550W
- Refrigerant
- R32
Quick answers
Can I use it with an existing duct system?
Yes, when the ducted ceiling assembly is selected and the RV duct layout meets the installation requirements.
Does the heat pump replace a propane furnace?
The heat pump adds warmth in milder cold; use a properly sized furnace for freezing-weather travel.
Can it run from an inverter?
Only when the complete inverter, battery, wiring and charging system can support compressor startup and continuous load.
Build around a larger RV with hot water and cold-weather systems matched to its doors, ducts, power and utilities.
Add stable on-demand hot water with a built-in mixing tank and matching RV door package.
View door and installation fitPair heat-pump warmth with higher-output propane heat for colder conditions. Confirm furnace cabinet dimensions, ductwork, 12V power and LP supply.
Check furnace fit and options
High-output comfort across more seasons
InstaCool Pro Max combines 18,000 BTU cooling, 16,000 BTU heat-pump heating and ducted or non-ducted compatibility. It is the step-up choice for owners who want high summer output without giving up useful rooftop heat in cooler weather.

Cool hard and keep traveling into fall
Pro Max adds stronger heat-pump output and flexible ceiling compatibility without stepping away from the 18K cooling platform.

Recover larger cabins after summer heat
The system is intended for medium-to-large RVs and remains useful in demanding outdoor temperatures up to 115°F.

Use heat-pump warmth on cool days
The heat pump is useful down to approximately 28°F, while freezing conditions may still require a properly sized furnace.

Balance recovery with four fan speeds
Dual variable-speed motors adjust airflow instead of forcing the system to run at one fixed pace.

Choose ducted or non-ducted airflow
The same rooftop output can be matched to the ceiling layout already used in the RV.
Choose Pro Max for changing-weather travel
Pro Max earns its place when both high cooling and meaningful rooftop heating will actually be used.
The 18K cooling platform provides more recovery capacity than Ultra.
The 16K heat pump adds much more rooftop heating than a small PTC heater.
Ultra has lower output but a below-43-dB low mode and a smaller all-season positioning.
Match the ceiling kit and roof space
Pro Max supports ducted or non-ducted installations with the matching ceiling kit.

Flexible fit for ducted or non-ducted RVs.
The 14.25-inch opening, 115V supply and selectable ceiling kit support straightforward rooftop replacement planning.
- Roof opening
- 14.25 × 14.25 in
- Rooftop size
- 33.3 × 27.9 × 14.2 in
- Power supply
- 115V AC / 12V DC / 60Hz
- Rated current
- 13A
- Ceiling layout
- Ducted or non-ducted
Choose by heat, sound and output
Pro Max combines the widest ceiling compatibility with 18K cooling and 16K heat-pump warmth.

InstaCool Pro Max
For larger rigs needing 18K cooling, 16K heat and flexible ceiling installation.
- Cooling
- 18K BTU
- Heating
- 16K heat pump
- Ceiling
- Ducted / non-ducted

InstaCool Ultra
For quiet nights and useful mild-weather heat in a non-ducted RV.
- Cooling
- 16K BTU
- Heating
- 12.5K heat pump
- Low mode
- Below 43 dB

InstaCool Pro 18K
For maximum summer cooling when the furnace already handles winter.
- Cooling
- 18K BTU
- Heating
- None
- Ceiling
- Ducted / non-ducted
See Pro Max performance and installation
See cooling behavior, replacement work and electrical planning for the all-season platform.
▶See how an 18K rooftop system is tested
A detailed look at measured cooling behavior and operating performance.
▶See what a replacement installation involves
Roof preparation, lifting, sealing, ceiling work and startup checks.
▶Understand inverter and battery requirements
Startup load, continuous draw and cooling away from full hookups.
Quick answers about Pro Max cooling, heat and fit
See how heat-pump comfort, ceiling flexibility and roof fit work together.
When is the 16K heat pump most useful?
It provides efficient rooftop warmth for cool mornings and shoulder-season travel down to approximately 28°F. Use the RV furnace for freezing conditions.
Can it work with a ducted ceiling?
Yes. Select the ducted configuration for an existing ceiling-duct system, or the non-ducted configuration for direct ceiling airflow.
How is it different from Pro 18K?
Both provide 18K cooling. Pro Max adds 16K heat-pump heating for wider seasonal use.
How is it different from Ultra?
Pro Max adds 18K output and ducted compatibility; Ultra prioritizes quieter non-ducted operation.
What installation does it support?
It uses a 14.25 × 14.25-inch roof opening, 115V power and either a ducted or non-ducted ceiling configuration.
Ready for high-output all-season comfort?
Choose the matching color and ceiling configuration above. The installation guide is available for final fit planning.
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