1. Dometic FreshJet 3 Rooftop Air Conditioner

The Dometic FreshJet 3 Rooftop Air Conditioner is a highly recommended solution for campervan and RV conversions, offering robust cooling, energy efficiency, and flexible installation options suited for both casual travelers and full-time vanlifers.

What Makes It Ideal for Campervan Conversions
- Compact design and medium profile (13.8" height) make it easier to install on varying roof types and help maintain a low vehicle profile[2][1].
- Lightweight build (64 lbs) means less strain on your roof and easier handling during installation[2][1].
- Backwards compatibility with standard 14" x 14" vent openings and previous Dometic or competitor air returns allows use in both new conversions and retrofits[2][1].

Key Features and Benefits
- 13,500 BTU cooling capacity delivers strong, reliable cooling, suitable for most campervans and midsize RVs—even in warm climates[1][3].
- Energy efficiency: Consumes 28% less refrigerant than previous models and uses just 1665W (in cooling mode), which is important for off-grid and solar-powered rigs[2][3].
- 4 dB noise reduction over comparable air conditioners for quieter operation, crucial in small, acoustically sensitive vans[2][3].
- 15% greater airflow and 13% higher cooling capacity than previous Dometic Brisk II models, ensuring fast, efficient temperature control[2][3].
- Durable construction: E-coated evaporator coils offer better corrosion resistance and longevity, a must for mobile use[1][2].
- Ducted or non-ducted operation compatible, fitting a wide range of camper layouts[1][3].
- Aesthetics: Modern design with hidden screws and no vent holes on the exterior for cleaner appearance and reduced risk of water ingress[2].

What to Look For When Buying
- BTU rating appropriate for your vehicle size; 13,500 BTU is optimal for most vans and smaller RVs but may be overkill for micro-campers.
- Power supply compatibility: 115V AC, 20A breaker required[3].
- Control type: Requires a separate control kit or air distribution box—confirm you have or can purchase compatible controls specific to your installation (ducted vs. non-ducted)[1][3].
- Generator compatibility: Pair with a soft start kit if planning to run off a small generator (~2000W)[2].

Common Mistakes to Avoid
- Neglecting roof opening size: Ensure your roof already has or can be cut to standard 14" x 14" opening[1].
- Insufficient electrical planning: Do not overlook the need for a 20A dedicated circuit and appropriate wiring.
- Choosing the wrong control system: Failing to match ducted/non-ducted accessories with your model can cause installation delays[3].
- Weight overestimation: Overbuilding support unnecessarily—the FreshJet 3 is lighter than typical older units you may be replacing[2].

Best Use Cases
- Weekend warriors benefit from rapid cooling, low noise, and straightforward controls, making short trips more comfortable and stress-free[2][3].
- Full-time living: Suits vans and RVs used in hot climates or occupied year-round, thanks to strong cooling performance and robust design features; reduced energy consumption is a bonus for solar or limited-power situations[1][3].

Budget Considerations and Value Analysis
- At around $1,000–$1,050[1][3], the FreshJet 3 represents mid-to-premium market pricing.
- Value highlights: Greater efficiency (lower ongoing energy usage), lightweight build, long-term reliability (e-coated coils), and flexibility across installation types.
- Compared to older or less efficient units, you'll save on energy and enjoy easier installation, making this a smart investment, especially for those concerned about roof load and power constraints[2].

For those seeking a future-proof, quiet, and efficient cooling solution for campervans and RVs, the Dometic FreshJet 3 stands out for its balance of performance, versatility, and reliability.

The Dometic FreshJet 3 Rooftop Air Conditioner (13,500 BTU) is a modern, efficient option for campervans and RVs, notable for quiet operation, lighter weight, and improved airflow compared to many similar rooftop units[1][2][3]. Its main competitors in the same category are:

Top 3-5 Alternative Rooftop AC Units:
- Dometic Brisk II (previous generation)
- Coleman-Mach 3 Plus
- Furrion Chill
- Airxcel Mach 8 Plus
- Advent Air ACM135

Pros and Cons Comparison Table

| Product | Pros | Cons | Price Range |
|---------------------------|----------------------------------------------------------------|----------------------------------------------------------|---------------|
| Dometic FreshJet 3 | High efficiency, 13% more cooling, 14% lighter, 15% more airflow, 4dB quieter, robust e-coated coils, fits 14"x14" vents, backward compatible | No factory heat pump, requires additional control kit for install | $990–$1,035[1][3] |
| Dometic Brisk II | Widely available, proven reliability, compatible with most RV controls | Heavier, less airflow and less efficient than FreshJet 3 | $830–$1,000 |
| Coleman-Mach 3 Plus | Strong cooling (13,500 BTU), solid reputation, easy service | Louder than FreshJet 3, heavier, less eco-friendly | $800–$1,000 |
| Furrion Chill | Quiet, high efficiency, competitive price, compact | Mixed service reports, limited ducted compatibility | $800–$1,200 |
| Airxcel Mach 8 Plus | Low profile, very quiet, efficient, can add heat strip | Typically pricier, less airflow than FreshJet 3 | $1,000–$1,400 |
| Advent Air ACM135 | Budget-friendly, fits many installs, simple controls | Louder, fewer efficiency features | $700–$900 |

When to Choose FreshJet 3 vs. Alternatives
- Choose FreshJet 3 for vans prioritizing energy efficiency, quiet sleeping environments (4dB quieter), weight savings (14% lighter), or if you need a rooftop unit that is backward-compatible with existing Dometic/competitor fittings[1][2][3].
- Opt for Coleman-Mach or Advent Air if you need a cheaper, no-frills AC, and noise or efficiency are less critical.
- Choose Mach 8 Plus if low roof clearance matters above all else.
- Pick Furrion Chill for a cost-effective quiet alternative but check for fitment on ducted installs.

Performance Differences for Van Life
- FreshJet 3: Slightly more cooling power, lower noise (ideal for stealth or urban vanlife), lower weight (better for payload limits), and uses less refrigerant (enviro-friendly)[2][3].
- Older models/Coleman-Mach: Heavier and noisier—fine for stationary RVs, less ideal for mobile or off-grid builds.
- Airxcel/Furrion: Similar cooling, variable on noise and efficiency; some offer integrated heat strips unlike FreshJet 3 (requires accessory).

The Dometic FreshJet 3 excels for modern vanlifers needing power, quiet, and efficiency—while older or budget models may suit less demanding, price-driven installs.

Installing the Dometic FreshJet 3 Rooftop Air Conditioner in a campervan requires careful planning and precise execution to ensure performance and prevent leaks.

Step-by-step overview:
- Select and mark the mounting location, ensuring roof support and clearance for airflow[1][2].
- Cut the required opening (typically 14”x14”) in the roof, treating cut edges to prevent rust[1].
- Prepare and lay the gasket carefully to avoid future leaks (custom gaskets recommended for ribbed roofs)[1].
- Position and place the rooftop unit directly over the opening—do not slide it on the gasket[2].
- Route the electrical wiring according to manufacturer specs; ensure excess cable for easy connections[2][3].
- Attach and secure the Air Distribution Box (ADB) from inside the van, torquing bolts evenly to specifications (22.2 in. lbs for FreshJet 3)[2].
- Connect electrical wiring as per local code and install the cover panels.
- Seal all exterior and interior edges as needed.

Common installation mistakes to avoid:
- Cutting holes without confirming roof rib locations or structural supports[1].
- Using the factory gasket on ribbed roofs; this often leads to leaks—opt for a van-specific gasket[1].
- Over-tightening or unevenly tightening bolts, causing the gasket to compress unevenly or deform[2].
- Neglecting to extend or properly secure wiring, risking shorts or difficulty in future maintenance[3].

Tools and materials needed:
- Jigsaw or reciprocating saw
- Drill with bits
- Screwdrivers and socket set
- Torque wrench
- Measuring tape
- Primer/paint for cut edges
- Sealant and van-specific gasket (if applicable)
- Personal protective equipment (PPE)

Estimated installation time:
4–8 hours for experienced DIYers; novices may take longer[1].

DIY vs professional installation:
DIY is feasible for those comfortable with cutting metal, electrical wiring, and sealing[1]. Hire a professional if unfamiliar with 115V AC power systems, unsure about roof structure, or if warranty is critical.

Safety considerations:
- Disconnect all power sources before beginning work[2].
- Use PPE to protect from metal shards and electrical hazards.
- Never work alone when cutting the roof or moving heavy units onto the van.

Pro tips from experienced van builders:
- Use a custom gasket for ribbed van roofs to prevent water ingress[1].
- Prime/paint all cut edges immediately to prevent corrosion[1].
- Have at least two people for hoisting the unit onto the roof safely due to its weight (80–90 lbs)[1].
- Double-check clearance for roof racks, solar panels, and interior framing before cutting.

Careful planning and adherence to best practices are critical for a reliable, leak-free installation.