If you interest for the best water heater for pressure washer setups, here’s the honest truth: the easiest and most effective solution is a hot water pressure washer. Cold water works for dirt and dust, but when grease, oil, gum, or heavy buildup is involved, heated water saves time, chemicals, and frustration. In this guide, I break down the best options from true commercial hot water units to high-powered cold water washers that many homeowners already use.
Top 5 Water Heaters for Pressure Washers
| Heater Name | PSI | GPM | Hot/Cold | Power Type | Best For |
| Easy Kleen Commercial Hot Water | 4000 | 3.5 | Hot | Gas | Commercial & heavy grease |
| Dewalt 61147S | 3300 | 2.4 | Cold | Gas | Home & jobsite cleaning |
| 5200PSI Power Washer | 5200 | N/A | Cold | Electric | Deep residential cleaning |
| 5000 Max Adjustable PSI | 5000 | 2.0 | Cold | Electric | Vehicles & patios |
| Electric 2.5 GPM Washer | N/A | 2.5 | Cold | Electric | Light-duty home use |
Best Water Heater for Pressure Washer Users
Easy Kleen Commercial Hot Water Portable Pressure Power Washer
This is the closest thing to a true “plug-and-play” answer if you want the best water heater for pressure washer performance. It’s a dedicated hot water unit with an onboard burner, meaning no external heater is needed. The Kohler engine delivers strong, consistent pressure while hot water cuts through grease, oil, and grime fast. It’s built for contractors, fleet washing, farms, and industrial surfaces where cold water simply fails.
Pros
- True hot water cleaning
- Commercial-grade durability
- High flow rate for faster jobs
Cons
- Expensive for casual users
- Heavy and not apartment-friendly
Best for: Commercial cleaning, oil stains, restaurant grease, heavy equipment
Dewalt PSI Gas Cold Water Pressure Washer
This Dewalt model is a strong choice if you want power without the cost of a full hot water system. While it doesn’t heat water, its gas engine and solid PSI make it compatible with external water heaters or hot water input in many setups. For homeowners upgrading from electric units, it feels like a serious step up.
Pros
- Reliable gas-powered performance
- Easy to maintain
- Jobsite-ready design
Cons
- No built-in heating
- Less effective on grease without hot water
Best for: Driveways, siding, decks, light commercial use
5200PSI Power Washer with 4 Quick Connect Nozzles
High PSI is the highlight here. This washer relies on pressure rather than heat, but when paired with warm tap water, it handles tough buildup surprisingly well. Foam cannon support makes it great for car detailing and surface prep where detergents do the heavy lifting.
Pros
- Very high PSI output
- Versatile nozzle options
- Strong cleaning for residential use
Cons
- No heating system
- Pressure can damage delicate surfaces
Best for: Driveways, fences, vehicles, patios
5000 Max Adjustable PSI Electric Pressure Washer
This electric washer is all about control and convenience. Adjustable PSI lets you dial things down for cars or crank it up for concrete. While it’s not a hot water unit, it works well with warm inlet water and chemical cleaners for everyday household grime.
Pros
- Adjustable pressure
- Hose reel adds convenience
- Quiet electric operation
Cons
- Lower flow rate
- Not for heavy grease jobs
Best for: Cars, patios, fences, light concrete cleaning
Electric Pressure Washer – 2.5 GPM Portable Lightweight
If portability matters more than raw power, this lightweight electric washer is a solid pick. It won’t replace a hot water system, but for routine cleaning with warm tap water and soap, it gets the job done without hassle.
Pros
- Lightweight and easy to store
- Good flow for an electric unit
- Simple setup
Cons
- Limited pressure
- Not suitable for grease or oil
Best for: Apartments, cars, decks, quick cleanups
Which Is the Best Water Heater for Pressure Washer Use?
- For heavy grease and oil: Go with a true hot water pressure washer like the Easy Kleen.
- For homeowners wanting flexibility: A gas cold-water unit that accepts warm water works well.
- For light-duty tasks: Electric washers paired with detergents are enough.
If budget allows, investing in a hot water system pays off fast in cleaning time and results. Cold water relies on force. Hot water relies on chemistry—and chemistry wins.
Final Thoughts
Choosing the best water heater for pressure washer setups depends on what you clean most. Grease, oil, and commercial messes demand heat. Dirt, dust, and mildew don’t. Match the machine to the mess, and you’ll save hours every year.
