Best Power Washer With Heater for Grease and Heavy Grime

#1 · Best Overall

1. Dapper Supply DP-CPW1140

• Dimensions: 44.5"L x 31.5"W x 42"H
• Weight: 388 lb
• Dimensions: 44.5"L x 31.5"W x 42"H

Best for: High-output jobsite cleaning.

Why it ranks #1: Its 4,350 PSI, 5.0 GPM, and 194°F diesel-heated output lead this group for heavy equipment, concrete, and job-site cleaning.

With 4,350 PSI and 5 GPM, the Dapper Supply washer delivers 21,750 stated cleaning units for equipment, concrete, and jobsite buildup. Its diesel burner heats water to 194°F, giving high-volume cleaning work a hot-water option for grease, oil, and other heavy residue.

The 5 GPM flow and 4,350 PSI pressure support high-output cleaning across equipment, concrete, and job sites, while water temperatures up to 194°F target greasy buildup with heat. A 50-foot hose extends the working reach, and the electric start supports engine startup. The water-cooled, direct-drive triplex pump is paired with a gun shut-off unloader, connecting pump design and shutoff operation to the cleaning workflow. Its 388-pound weight calls for suitable handling and storage space.

Skip it if you need a lighter hot-water washer; the Powerhorse propane model is listed at 176.5 pounds, but provides 2.6 GPM flow.

Choose this Dapper Supply washer for high-volume, heated cleaning across equipment, concrete, or jobsites where a 50-foot hose helps reach. Its 388-pound weight makes handling and storage a significant fit consideration.

Listed on Amazon as: Dapper Supply 4350 PSI Hot Water Gas Pressure Washer, 5.0 GPM, Diesel Heated, 50 ft Hose, Electric Start, Water-Cooled Triplex Pump, 49-State Compliant

#2 · High-Pressure Pick

2. MechMaxx HPW40K

• Dimensions: 39.4"L x 30.3"W x 53.4"H
• Weight: 404 lb
• Dimensions: 39.4"L x 30.3"W x 53.4"H

Best for: Kohler-powered commercial washdowns.

Why it ranks #2: The Kohler-powered unit delivers 3,500–4,000 PSI, 4.0 GPM, and water up to 200°F, with an integrated hose reel.

A Kohler CH440 Command Pro engine with electric start anchors this hot-water washer, which delivers 3,500–4,000 PSI, 4 GPM, and water temperatures up to 200°F. It enables high-flow washdowns of grease, oil, mud, and heavy buildup, with a diesel-fired heater supporting hot-water cleaning.

The triplex plunger pump works with 4 GPM flow for demanding washdown tasks, while temperatures up to 200°F help address greasy or oily buildup with heat as well as pressure. The integrated hose reel gives the hose a dedicated place with the washer between jobs. Electric start simplifies engine startup, but the unit is supplied without engine oil or gasoline; both must be added before operation. Its 404-pound weight also calls for substantial space and handling capacity.

Skip it if you need a washer under 200 pounds; the Powerhorse 3,600 PSI propane model is listed at 176.5 pounds, with 2.6 GPM flow.

This MechMaxx fits buyers seeking Kohler power, hot-water cleaning, and 4 GPM flow for demanding washdowns. Its 404-pound weight and the need to add engine oil and gasoline are practical considerations before bringing it into a work area.

Listed on Amazon as: MechMaxx 4000PSI 4GPM Kohler 429cc 14 HP E-Start Engine Hot Water Pressure Washer with Hose Reel, HPW40K

#3 · Honda Engine Pick

3. MechMaxx HPW40H

• Dimensions: 30.3"L x 53.4"W x 39.4"H
• Weight: 462 lb
• Dimensions: 30.3"L x 53.4"W x 39.4"H

Best for: Heavy-duty hot-water washdown.

Why it ranks #3: It pairs a Honda GX390 electric-start engine with 3,500–4,000 PSI, 4.0 GPM, and hot water up to 200°F.

A Honda GX390 electric-start engine powers this washer’s 3,500–4,000 PSI output and 4 GPM flow, while its diesel-fired heater raises water to 200°F. That combination suits demanding washdowns where hot water can help lift grease, oil, mud, and heavy buildup from equipment or other surfaces.

The triplex plunger pump pairs with 4 GPM flow for sustained, high-output cleaning, while water temperatures up to 200°F give hot water a role in tackling oily or greasy residue. An integrated hose reel keeps the hose together with the machine between jobs. The Honda GX390 uses electric start, but the engine arrives without oil or gasoline, so those must be added before startup. At 462 pounds, it is a substantial machine to accommodate and move.

Skip it if you need a lighter machine; the 176.5-pound Powerhorse 3,600 PSI propane model weighs less, though its listed output is 2.6 GPM.

Choose this MechMaxx for demanding grease and grime washdowns where 4 GPM flow, hot water, and a hose reel fit the workflow. Allow space for its 462-pound frame and prepare engine oil and gasoline before use.

Listed on Amazon as: MechMaxx Honda GX390 389CC 11.7HP E-Start Engine 4000 PSI 4 GPM Hot Water Pressure Washer with Hose Reel, HPW40H

#4

4. MechMaxx HPW40D

• Dimensions: 39.4"L x 30.3"W x 53.4"H
• Weight: 404 lb
• Dimensions: 39.4"L x 30.3"W x 53.4"H

Best for: Electric-start diesel-heated washing.

Why it ranks #4: Its 420cc electric-start engine powers 3,500–4,000 PSI and 4.0 GPM, while the diesel-fired heater reaches 200°F.

A ZONSEN GB420 electric-start engine powers this MechMaxx washer’s 3,500–4,000 PSI and 4 GPM output, while a diesel-fired system heats water to 200°F. It enables hot-water cleaning of grease, oil, mud, and heavy buildup for demanding washdowns, with a hose reel included.

The triplex plunger pump and 4 GPM flow support demanding washdown work, while water temperatures up to 200°F help address greasy or oily residue. The integrated hose reel provides a place to keep the hose with the machine between jobs. Electric start is a practical engine feature, but the washer arrives without engine oil or gasoline; both must be added before operation. At 404 pounds, it also requires room and suitable handling for positioning and storage.

Skip it if you need an included water tank; the MechMaxx HPW40KBT has a listed 245-gallon tank, unlike this hose-reel model.

This MechMaxx suits buyers seeking 4 GPM hot-water washdown performance with an electric-start ZONSEN engine and hose reel. Plan to add engine oil and gasoline before use, and account for its 404-pound weight.

Listed on Amazon as: MechMaxx 4000 PSI 4 GPM 420cc 13.4HP E-Start Gas Engine Hot Water Pressure Washer with Hose Reel, Model HPW40D

#5 · Built-In Tank

5. MechMaxx HPW40KBT

• Dimensions: 81.5"L x 40.6"W x 52.7"H
• Dimensions: 81.5"L x 40.6"W x 52.7"H

Best for: Tank-equipped mobile washdowns.

Why it ranks #5: This Kohler-powered 4,000 PSI, 4 GPM hot-water washer comes skid-mounted with a 245-gallon tank for mobile or remote work.

A listed 245-gallon tank distinguishes this skid-mounted MechMaxx, pairing water storage with a Kohler CH440 electric-start engine and 4,000 PSI, 4 GPM cleaning. Water temperatures up to 200°F and a diesel-fired heating system support hot-water washdowns where carrying a tank is part of the setup.

The 245-gallon tank is the defining workflow feature, combining stored water with a 4 GPM, 4,000 PSI washer for washdown setups that need an onboard supply. A diesel-fired heater raises water temperature to 200°F, supporting work on grease, oil, mud, and heavy buildup. The Kohler CH440 has electric start. The 81.5-by-40.6-by-52.7-inch dimensions make this skid-mounted unit a substantial installation, and engine oil and gasoline must be added before starting.

Skip it if you need a more compact washer; the MechMaxx HPW40K measures 39.4 by 30.3 by 53.4 inches and has no listed tank.

Choose this MechMaxx for washdown work where a 245-gallon onboard tank and hot-water cleaning fit the site setup. Its large skid dimensions and need for engine oil and gasoline make installation space and preparation key considerations.

Listed on Amazon as: MechMaxx 4000 PSI 4 GPM Kohler E-Start Engine Hot Water Pressure Washer Skid Mounted with 245 Gal Tank, Model HPW40KBT

#6

6. Powerhorse Diesel Heater

• Dimensions: 37"L x 23.03"W x 36.22"H
• Weight: 407 lb
• Dimensions: 37"L x 23.03"W x 36.22"H

Best for: High-flow diesel-heated cleaning.

Why it ranks #6: Its 4,000 PSI and 4 GPM suit demanding work, and the diesel-fired burner raises incoming water temperature by up to 150°F.

A diesel-fired burner raises incoming water temperature by up to 150°F on this 4,000 PSI, 4 GPM Powerhorse washer. The resulting combination is aimed at residential and commercial jobs where pressure and flow help remove grease, oil, mud, and heavy buildup more quickly than cold-water cleaning.

The 4,000 PSI pressure and 4 GPM flow combine for a stated 16,000 cleaning units, making the washer suited to demanding cleaning applications rather than low-output spot work. Its diesel-fired burner raises incoming water temperature by up to 150°F, adding heat to help dissolve grease, oil, and mud. The listed dimensions are 37 by 23.03 by 36.22 inches, while the 407-pound weight means buyers should account for substantial handling and storage needs.

Skip it if you need a washer below 200 pounds; the Powerhorse 3,600 PSI propane model is listed at 176.5 pounds, though it has lower flow.

This Powerhorse suits residential or commercial buyers who need 4,000 PSI, 4 GPM, and diesel-heated cleaning for demanding buildup. Its 407-pound weight and sizable footprint make handling and storage important fit considerations.

Listed on Amazon as: Powerhorse Gas Hot Water Pressure Washer with Diesel Heater, 4000 PSI

#7 · Highest Temperature

7. Green-Power America GNHW3530E

• Dimensions: 39.4"L x 22.1"W x 28.3"H
• Dimensions: 39.4"L x 22.1"W x 28.3"H

Best for: High-temperature fleet cleaning.

Why it ranks #7: The electric-start gas model reaches 212°F and delivers 3,500 PSI at 3.0 GPM, with a 33-foot high-pressure hose.

A burner temperature of up to 212°F gives this Green-Power America washer unusually hot water for melting heavy oil, caked-on grease, and industrial grime. Its electric-start 223cc four-stroke engine supplies 3,500 PSI at 3.0 GPM, making it a fit for machinery, driveways, and fleet vehicles.

The 212°F maximum temperature supports hot-water treatment of hardened oil and grease, while 3,500 PSI and 3.0 GPM provide the listed cleaning output for machinery, driveways, and fleet vehicles. Electric start is paired with a 223cc four-stroke OHV engine. A 33-foot high-pressure hose extends reach, and quick-connect spray options support changing the spray setup. Its 3.0 GPM flow is a limit for buyers who need the higher flow listed by some larger washers.

Skip it if you need at least 4 GPM; the Dapper Supply 4,350 PSI washer lists 5 GPM for higher-volume cleaning.

Choose this Green-Power America for machinery, driveways, or fleet vehicles where 212°F water and electric start suit the work. Its 3.0 GPM output is the main boundary for buyers comparing high-flow washdown needs.

Listed on Amazon as: Green-Power America GNHW3530E 3500 PSI 3.0 GPM Hot Water Pressure Washer

#8

8. NorthStar Wet Steam Washer

• Dimensions: 46"L x 32"W x 42.5"H
• Weight: 464 lb
• Dimensions: 46"L x 32"W x 42.5"H

Best for: Wet-steam workshop cleaning.

Why it ranks #8: This 230V model offers 2,750 PSI, 2.5 GPM, a 150° temperature rise, and 250° wet steam for electrically powered cleaning.

This NorthStar produces wet steam at 250°F, giving grease and grime a high-heat cleaning option alongside hot-water operation. Its 150° temperature rise, 2,750 PSI pressure, and 2.5 GPM flow suit buyers prioritizing heated cleaning and workflow conveniences over the higher pressure and flow of larger models.

The 250°F wet-steam output and stated 150° temperature rise provide a heat-focused approach to dirt, grease, and oils. Total Start/Stop turns the washer on when the trigger is pulled and off when released, linking operation to the spray workflow. Built-in storage holds the hose, gun, nozzles, and cordset, while the chemical injector applies chemicals by changing a nozzle. The 230V specification and 464-pound weight are important installation and handling considerations.

Skip it if you do not have access to 230V power; the gas-powered Powerhorse 3,600 PSI propane model does not list that electrical requirement.

This NorthStar fits buyers with 230V access who value wet steam, trigger-linked start-stop operation, and onboard storage for workshop cleaning. Its 2,750 PSI and 2.5 GPM output set a lower-flow boundary for demanding washdowns.

Listed on Amazon as: NorthStar Wet Steam/Hot Water Pressure Washer, 2,750 PSI, 2.5 GPM, 230V

#9

9. Powerhorse Propane Burner

• Dimensions: 37"L x 23.03"W x 36.22"H
• Weight: 176.5 lb
• Dimensions: 37"L x 23.03"W x 36.22"H

Best for: Propane-heated grease cleanup.

Why it ranks #9: It provides hot-water cleaning at 3,600 PSI and 2.6 GPM, but its propane tank is not included and flow is lower than most gas options.

A propane-powered burner heats water to 150°F in minutes on this 3,600 PSI washer, enabling hot-water treatment of oil, grease, and grime without waiting long for heat. Its 2.6 GPM flow and 176.5-pound listed weight make it a lower-flow, lighter option among these industrial-style machines.

The burner’s stated ability to heat water to 150°F in minutes supports faster readiness for jobs involving greasy or oily residue. Pressure reaches 3,600 PSI, while 2.6 GPM provides the listed flow for directing that cleaning power at a task. Propane fuels the burner, but a propane tank is not included, so buyers need to supply one. The 176.5-pound weight is notably lower than the heavier listed hot-water units, although it remains a substantial washer to handle.

Skip it if you need 4 GPM flow; the Powerhorse diesel-heated 4,000 PSI model lists that output, unlike this 2.6 GPM washer.

Pick this Powerhorse when propane heating, quick warm-up, and a lighter listed weight suit grease-focused cleaning. Its 2.6 GPM flow is the key boundary; buyers needing greater flow should consider a higher-output washer.

Listed on Amazon as: Powerhorse Hot Water Pressure Washer, 3,600 PSI, 2.6 GPM, Propane Burner