High Temp vs Low Temp Commercial Dishwashers: Complete Buying Guide

Choosing between a high temp and low temp commercial dishwasher is one of the most important equipment decisions for any foodservice operation. The right machine affects sanitation, operating costs, drying speed, installation requirements, and overall kitchen workflow.

Both types clean and sanitize effectively—but they do it differently:

• High temp dishwashers sanitize using hot water
• Low temp dishwashers sanitize using chemical solutions

Under U.S. standards, both methods meet sanitation requirements when operated correctly. Most high-temp machines require a 180°F final rinse (with a 165°F exception for certain stationary-rack units), while low-temp machines rely on approved chemical sanitizers.

👉 The best choice depends on your kitchen volume, utilities, and workflow priorities. Commercial dishwashers are designed for durability, high-volume performance, and consistent sanitation in demanding kitchen environments.

Quick Answer

• High temp = heat-based sanitation
• Low temp = chemical-based sanitation

At-a-Glance Comparison

Feature	High Temp Dishwasher	Low Temp Dishwasher
Sanitization method	Heat	Chemical sanitizer
Final rinse	~180°F (most units)	Chemical rinse
Upfront cost	Higher	Lower
Energy use	Higher	Lower
Chemical use	Minimal	Ongoing
Drying speed	Faster	Slower
Installation	More complex	Easier
Ventilation	Often higher	Usually lower
Best for	High-volume kitchens	Small to mid-volume

👉 Both types meet health-code requirements when properly operated.

What Is a High Temp Dishwasher?

A high temperature commercial dishwasher uses very hot water to sanitize dishes, typically with a final rinse at 180°F (for most commercial machines). Instead of relying on chemicals, it uses heat to eliminate bacteria and pathogens.

How High Temp Dishwashers Work

Step	Process	Purpose
Wash cycle	Hot water + detergent removes food and grease	Cleans surface debris
Rinse cycle	High-temperature water (≈180°F)	Sanitizes wares
Heat action	Elevated temperature kills bacteria	Meets sanitation standards

Key Benefits of High Temp Dishwashers

Benefit	Why It Matters
No chemical sanitizer required	Reduces reliance on chemical supplies
Faster drying	Dishes come out hot and air-dry quickly
Reduced chemical residue	Better for taste-sensitive applications
Strong grease cleaning	Handles heavy soil and cookware effectively
Faster workflow	Improves turnaround during peak hours

👉 Best for fast-paced, high-volume kitchens that need speed and performance.

High Temp Dishwasher Requirements

Requirement	Details
Booster heater	Often required to reach sanitizing temperature
Electrical capacity	Higher demand
Ventilation	May be needed due to heat and steam
Water temperature	Must consistently meet sanitizing standards

What Is a Low Temp Dishwasher?

A low temperature commercial dishwasher uses chemical sanitizers instead of high heat to sanitize dishes. The final rinse includes a chemical solution that eliminates bacteria at lower temperatures.

How Low Temp Dishwashers Work

Step	Process	Purpose
Wash cycle	Water + detergent removes debris	Cleans dishes
Final rinse	Chemical sanitizer is injected	Sanitizes wares
Chemical action	Sanitizer kills bacteria	Meets sanitation standards

Common Sanitizers Used

Sanitizer Type	Characteristics	Typical Use
Chlorine	Fast-acting, cost-effective	Common in restaurants
Iodine	Stable, less corrosive	Specialty applications
Quaternary ammonium (quat)	Long-lasting, less odor	Foodservice environments

Key Benefits of Low Temp Dishwashers

Benefit	Why It Matters
Lower upfront cost	Easier initial investment
No booster heater required	Simplifies installation
Lower energy consumption	Reduces utility demand
Easier setup	Works in more locations
Flexible placement	Ideal for small or tight spaces

👉 Best for smaller operations or kitchens with limited utilities.

Pros and Cons Comparison

High Temp Dishwashers

Pros	Cons
✔ Fast drying	✖ Higher purchase cost
✔ No sanitizer chemicals required	✖ Higher energy usage
✔ Excellent for high volume	✖ May require booster heater
✔ Strong grease cleaning	✖ More complex installation

Low Temp Dishwashers

Pros	Cons
✔ Lower upfront cost	✖ Ongoing chemical costs
✔ Easier installation	✖ Slower drying
✔ Lower energy usage	✖ Requires chemical monitoring
✔ Flexible placement	✖ May need more pre-rinsing

Operating Cost Comparison

Understanding long-term costs is key when choosing between high temp and low temp systems.

Cost Factor	High Temp	Low Temp	Key Insight
Equipment	Higher	Lower	Low temp easier upfront
Energy	Higher	Lower	High temp uses more heat
Chemicals	Minimal	Ongoing	Low temp adds recurring cost
Booster heater	Often required	Not needed	Adds installation cost
Ventilation	Higher	Lower	May impact facility setup
Drying labor	Lower	Higher	Faster drying saves labor

👉 The lowest upfront cost is not always the lowest long-term cost.

Sanitation Performance

Both systems can meet health and safety standards when properly maintained and operated.

High Temp Checklist

Requirement	Why It Matters
Correct final rinse temperature	Ensures effective heat sanitization
Working booster heater	Maintains required heat levels
Regular deliming	Prevents scale buildup
Proper cycle completion	Ensures full sanitation

Low Temp Checklist

Requirement	Why It Matters
Proper sanitizer concentration	Ensures effective chemical kill
Calibrated chemical feed	Prevents under- or over-dosing
Adequate contact time	Required for sanitation effectiveness
Routine monitoring	Maintains compliance

👉 Proper operation matters more than machine type.

Drying Speed & Workflow Impact

Factor	High Temp	Low Temp	Operational Impact
Dish temperature	Hot	Cooler	Affects drying speed
Drying speed	Fast	Slower	Impacts turnaround time
Rack turnaround	Faster	Slower	Key during peak hours
Hand drying need	Lower	Higher	Impacts labor efficiency

👉 High temp machines improve workflow because dishes flash-dry, making them ideal for peak service periods.

Real-World Performance Summary

Scenario	High Temp Advantage	Low Temp Advantage
Busy dinner rush	Faster throughput	May slow workflow
Heavy grease loads	Better cleaning	May require pre-rinse
Small café	Overkill	Cost-effective
Limited utilities	May not fit	Easier setup

Bottom Line

Type	Strength	Best For
High Temp	Speed, drying, high-volume performance	Restaurants, hotels, institutions
Low Temp	Lower cost, easier setup, flexibility	Cafés, bars, small kitchens

• High temp → Faster, heat-based, ideal for heavy use
• Low temp → Lower cost, chemical-based, easier setup

👉 The best choice depends on your volume, utilities, and operational priorities.

Which Is Better: High Temp or Low Temp Dishwasher?

Choosing between a high temp and low temp commercial dishwasher comes down to your kitchen volume, workflow, budget, and infrastructure. Neither option is universally better—the right choice depends on how your operation runs day to day.

Choose High Temp If You Need:

• Fast turnaround during peak service hours
• Heat-based sanitation without relying on chemical sanitizers
• Faster drying times (dishes come out hot and air-dry quickly)
• High-volume dishwashing capacity
• Strong performance for greasy cookware and heavy soil loads

👉 Best for: Restaurants, hotels, institutional kitchens, and high-output operations.

Choose Low Temp If You Need:

• Lower upfront equipment investment
• Simpler installation with fewer utility requirements
• Lower energy consumption
• A practical solution for smaller-scale operations
• Flexibility in locations without high-temp infrastructure

👉 Best for: Cafés, bars, small restaurants, and limited-space kitchens.

Quick Decision Table

Kitchen Priority	Better Choice
High-speed service	High Temp
Lower startup cost	Low Temp
Minimal chemical use	High Temp
Easy installation	Low Temp
Heavy dish volume	High Temp
Small kitchen setup	Low Temp

👉 The decision depends on balancing cost, volume, and operational needs.

Cost Comparison: High Temp vs Low Temp

When comparing dishwashers, it’s important to evaluate total cost of ownership, not just purchase price.

High Temp Costs

• Higher upfront equipment cost
• Often requires a booster heater
• Higher energy consumption (electric or gas)
• Lower reliance on chemical sanitizers

Low Temp Costs

• Lower initial purchase price
• Ongoing cost of chemical sanitizers
• Typically lower energy usage
• No booster heater required

Cost Breakdown Comparison

Cost Factor	High Temp	Low Temp
Initial investment	Higher	Lower
Energy usage	Higher	Lower
Chemical cost	Minimal	Ongoing expense
Installation cost	Higher	Lower
Long-term cost	Depends on volume	Depends on chemical usage

👉 Over time, total cost depends on usage volume, chemical pricing, and local utility rates.

When to Avoid Each Type

Avoid High Temp Dishwashers If:

• Limited electrical or gas capacity
• Tight startup budget
• No ventilation system available

Avoid Low Temp Dishwashers If:

• You run a high-volume kitchen
• You handle heavy grease loads
• You need fast drying during peak service

👉 Choosing the wrong type can slow down workflow or increase long-term costs.

Sanitation and Health Code Considerations

Both high temp and low temp dishwashers are approved for commercial use when they meet sanitation standards set by local health departments and regulatory agencies.

Key Requirements

Dishwasher Type	Requirement
High Temp	Must reach required final rinse temperature (typically ~180°F)
Low Temp	Must use approved chemical sanitizers at proper concentration

👉 Compliance depends on proper operation, not just machine type. Always follow local health regulations.

Dishwasher Types in Commercial Kitchens

Both high temp and low temp systems are available in multiple configurations depending on kitchen size and dish volume.

Common Commercial Dishwasher Types

Type	Best For	Key Advantage
Undercounter	Small kitchens, bars	Compact and space-saving
Door-Type (High Hood)	Medium to high volume	Efficient batch washing
Conveyor	Large-scale operations	Continuous, high-capacity washing

👉 Choose the format based on your volume, available space, and workflow needs.

High Temp Dishwasher Installation Requirements

High temp dishwashers usually require more robust utility support because they sanitize using very hot water.

Common requirements:

• Often require a booster heater to reach sanitizing rinse temperatures
• Higher electrical or gas demand
• May require ventilation or hood systems due to heat and steam
• Need reliable hot water supply and proper plumbing connections
• May require more installation planning in older buildings

High Temp Installation Overview

👉 High temp dishwashers are typically better suited for kitchens with stronger utility infrastructure and higher-volume demands.

Low Temp Dishwasher Installation Requirements

Low temp dishwashers are generally easier to install because they do not rely on extremely hot rinse water for sanitization.

Common requirements:

• Require chemical dispenser systems
• Lower overall power requirements
• Easier to install in compact spaces
• Usually do not require a booster heater
• Often involve simpler plumbing and electrical setup

Low Temp Installation Overview

👉 Low temp dishwashers are often the easier choice for small kitchens, leased spaces, and operations with limited utility capacity.

High Temp vs Low Temp Installation Comparison

Utility Considerations Before You Buy

Before selecting a commercial dishwasher, check whether your kitchen can support the machine’s installation requirements.

Key questions to ask:

• Does your space have enough electrical or gas capacity?
• Can your plumbing system support the dishwasher’s water needs?
• Is there room for a booster heater if needed?
• Will your local code require a hood or ventilation system?
• Do you have space and supply access for chemical dispensing equipment?

Pre-Installation Checklist

How to Choose a Commercial Dishwasher

1. Volume of Dishes

Volume Level	Recommended Option
Low	Low temp or undercounter
Moderate	Either option
High	High temp preferred

👉 High-volume kitchens benefit from faster throughput and drying.

2. Available Utilities

Utility Factor	High Temp	Low Temp
Power requirements	Higher	Lower
Hot water demand	Higher	Lower
Chemical supply	Optional	Required

👉 Ensure your kitchen can support the machine’s power, water, and chemical needs.

3. Space and Installation

Kitchen Size	Recommended Type
Tight space	Undercounter
Medium kitchen	Door-type
Large operation	Conveyor

👉 Proper sizing improves workflow and prevents bottlenecks.

4. Operating Costs

• Energy vs chemical cost tradeoff
• Maintenance requirements
• Labor efficiency (drying time, throughput)
• Equipment lifespan

👉 The lowest upfront cost isn’t always the most cost-effective long term.

Real-World Performance Differences

Understanding how each type performs in real kitchen scenarios can help guide your decision.

Scenario	High Temp	Low Temp
Peak hours	Faster throughput	Slower processing
Greasy cookware	Better performance	May require more pre-rinsing
Drying	Air dries quickly	May need towel drying
Maintenance focus	Heating components	Chemical systems
Workflow efficiency	Higher in busy kitchens	Adequate for lighter use

👉 High temp excels in speed and drying, while low temp offers simplicity and lower entry cost.

Practical Use Case Examples

Different kitchen environments have different dishwashing demands. Matching the dishwasher type to your operation ensures better efficiency, sanitation, and workflow.

Kitchen Type	Recommended Dishwasher	Why It Works
Full-service restaurant	High Temp	Handles high volume and fast turnaround
Hotel or banquet kitchen	High Temp	Supports continuous, large-scale dishwashing
Coffee shop or café	Low Temp	Lower volume, cost-effective solution
Bar or lounge	Low Temp	Ideal for glassware and lighter loads
School or hospital kitchen	High Temp (often)	Meets strict sanitation and high-capacity needs

👉 Choosing based on real-world use cases helps prevent underperformance or overspending.

Are High Temp Dishwashers Worth It?

Yes—high temp dishwashers are often worth it for demanding environments where speed, sanitation, and performance are critical.

Best for:

• High-volume restaurants and busy kitchens
• Operations with heavy grease loads
• Kitchens that require fast turnaround during peak hours
• Facilities prioritizing heat-based (chemical-free) sanitation

Key Advantages

Benefit	Impact
Faster drying	Reduces wait time between cycles
High throughput	Keeps up with busy service periods
No chemical sanitizer needed	Simplifies sanitation process
Strong cleaning performance	Handles grease and heavy soil effectively

👉 They provide faster turnaround and better drying performance, making them ideal for high-demand kitchens.

Are Low Temp Dishwashers Worth It?

Yes—low temp dishwashers are a practical and cost-efficient option for smaller or less demanding operations.

Best for:

• Small restaurants, cafés, and coffee shops
• Operations with limited budgets
• Kitchens with lower dish volume
• Spaces with limited electrical or hot water capacity

Key Advantages

Benefit	Impact
Lower upfront cost	Easier initial investment
Easier installation	No booster heater required
Lower energy usage	Reduces utility demand
Flexible setup	Works well in smaller spaces

👉 They offer lower upfront costs and simpler installation, making them ideal for smaller-scale operations.

High Temp vs Low Temp: Value Summary

Factor	High Temp	Low Temp
Upfront cost	Higher	Lower
Energy usage	Higher	Lower
Chemical cost	Minimal	Ongoing
Drying speed	Faster	Slower
Best for volume	High	Low to moderate
Installation	More complex	Easier

👉 Your choice should reflect your kitchen’s workload and cost priorities.

Frequently Asked Questions

Do high temp dishwashers need chemicals?

No. They sanitize using high-temperature water, although detergents and rinse aids are still used for cleaning performance.

Are low temp dishwashers safe?

Yes. When used with approved sanitizing chemicals at proper concentrations, they meet health and safety standards.

Which is cheaper to run?

• Low temp: Lower energy cost, but ongoing chemical expenses
• High temp: Higher energy cost, but minimal sanitizer use

👉 Total cost depends on usage volume and local utility pricing.

Which is better for restaurants?

• High temp: Best for high-volume, full-service restaurants
• Low temp: Suitable for smaller or lower-demand operations

Final Takeaway

High temp and low temp dishwashers both achieve proper sanitation—but they do so in different ways and serve different operational needs.

Type	Key Advantage	Best Use
High Temp	Speed and heat-based sanitation	High-volume kitchens
Low Temp	Lower cost and simpler setup	Small to mid-volume kitchens

• High temp → Faster, heat-based, ideal for heavy use
• Low temp → Lower cost, chemical-based, easier setup

👉 The best choice depends on your kitchen’s volume, budget, and infrastructure.

Upgrade Your Dishwashing Setup

Investing in the right commercial dishwasher improves sanitation, workflow efficiency, and long-term cost control.

👉 Choosing the right dishwasher from Restaurantsupply.com helps reduce downtime, improve cleanliness, and support long-term kitchen performance.