InSinkErator HOT100 Vs. HOT150 Hot Water Dispenser For You

If you’re in the market for an instant hot water dispenser, the InSinkErator HOT100 and HOT150 are two popular models worth considering. Both dispensers deliver piping hot water on demand, perfect for making coffee, tea, hot chocolate, instant soups, oatmeal, and more.

But some key differences between the HOT100 and HOT150 are important to understand before making your purchase.

In this comprehensive guide, we’ll compare the HOT100 and the HOT150 across a range of factors to help you determine which hot water dispenser is the better fit for your needs and budget.

Key Specs Comparison Table

Before diving into the details, here is a high-level overview of how the InSinkErator HOT100 and HOT150 hot water dispensers stack up against one another:

SpecsInSinkErator HOT100InSinkErator HOT150
Tank Capacity0.5 gallons1.0 gallons
Hot Water Capacity100 cups150 cups
Temperature Settings160°F or 180°F160°F or 180°F
Flow Rate1.5 GPM1.5 GPM
Dimensions14.5 x 6.2 x 17.2 in14.5 x 6.2 x 17.2 in
Warranty2 years3 years

As you can see, the main differences come down to tank/hot water capacity and the warranty length. The larger 1 gallon tank on the HOT150 allows it to deliver 50% more cups of hot water between heating cycles. And it comes with an additional year of warranty coverage.

Beyond these differences, the HOT100 and HOT150 share many of the same core features and performance specs. Now let’s take a more detailed look at each dispenser.

HOT100 Overview

The InSinkErator HOT100 is a compact and affordable instant hot water dispenser perfect for small households. Despite its smaller 0.5 gallon tank capacity, it can still deliver up to 100 cups of steaming hot water before the tank needs time to reheat.

Here are the key features and benefits of the HOT100:

InSinkErator HOT100 Hot Water Dispenser
  • Compact size: With dimensions of 14.5 x 6.2 x 17.2 inches, the HOT100 has a slim tank that can fit under most cabinets or counters. Ideal when space is limited.
  • On demand hot water: Dispenses piping hot water instantly whenever you need it at your chosen temperature setting of 160°F or 180°F. No more waiting for water to boil.
  • 100 cup capacity: Can deliver up to 100 cups of hot water between heating cycles. Perfect for 1-3 person households.
  • Fast 1.5 GPM flow rate: Fills cups, carafes, and pots quickly.
  • Easy installation: All necessary parts for installing under your sink are included. Can usually be installed in under an hour.
  • Quiet operation: Uses advanced TriRing Heating technology for nearly silent operation and no audible boiling sounds.
  • Energy efficient: Only heats the amount of water in its tank as needed rather than maintaining a full tank at temperature. Saves energy.
  • Safe & durable: Overheat protection shutoff, durable stainless steel tank design built to last.
  • 2 year warranty: Backed by a 2 year limited warranty from InSinkErator.

For a small household looking for an affordable and reliable instant hot water dispenser, the InSinkErator HOT100 is an excellent choice.

Its slim tank won’t take up much space and it delivers hot water on demand for making coffee, tea, oatmeal and more. Just keep in mind its 100 cup capacity between heating cycles.

HOT150 Overview

Stepping up to the InSinkErator HOT150 gets you a larger 1 gallon tank capacity capable of delivering 150 cups of hot water before needing to reheat. Here are the key features:

InSinkErator HOT150 Hot Water Dispenser
  • Larger 1 gallon tank: Provides an extra 50% hot water capacity vs the HOT100, for fewer heating cycles needed in a day.
  • 150 cup capacity: Get up to 150 cups of steaming hot water on demand before the tank requires reheating. Ideal for 3-5 person households.
  • Fast 1.5 GPM flow rate: Fills your cup or carafe quickly.
  • Compact design: At 14.5 x 6.2 x 17.2 inches, the tank fits easily under most sinks while holding 1.5X more water than the HOT100.
  • TriRing heating: Advanced heating technology heats water faster while keeping operation quiet. No audible boiling sounds.
  • Overheat protection: Shutoff mechanism prevents tank temperatures from rising to scald levels, for safety.
  • Durable stainless steel tank: Built to last with premium materials and components.
  • 3 year warranty: Offers an extra year of coverage compared to the HOT100.
  • Same precision temperature: Like the HOT100, choose your ideal water temperature of either 160°F or 180°F.
  • Energy efficient operation: Only heats the water volume in the tank on an as-needed basis.

With its larger tank capacity, the HOT150 is ideal for slightly larger households that make frequent cups of coffee, tea, soups, and more. The extra 50 cups of capacity makes a difference over the course of a day. And the durable, quiet operation delivers hot water for years to come.

HOT100 Vs. HOT150: Comparison of Key Features

Now that we’ve provided an overview of each model, let’s do a direct comparison of some of the most important features between the HOT100 and HOT150 hot water dispensers:

Tank & Hot Water Capacity

  • HOT100: 0.5 gallon tank, 100 cup capacity
  • HOT150: 1 gallon tank, 150 cup capacity

The larger 1 gallon tank on the HOT150 allows it to deliver 50% more hot water between heating cycles. This is advantageous for larger households.

Heating Technology

  • Both models use TriRing Heating for nearly silent yet fast water heating. There is no audible boiling.

Temperature Options

  • Both dispensers allow you to select either 160°F or 180°F for the output water temperature.

Water Flow Rate

  • Both models provide hot water at an equal fast flow rate of 1.5 gallons per minute. Quickly fills cups, carafes or pots.


  • The HOT100 and HOT150 come with identical installation hardware for under sink mounting. In most cases, no electrical upgrades needed. Installation process is the same.


  • Identical dimensions of 14.5 x 6.2 x 17.2 inches for both dispensers. Compact tanks fit under most sinks.

Energy Efficiency

  • Both models only heat the volume of water contained in the tank. This on demand operation is more energy efficient than heating and maintaining a full tank all day.

Safety Features

  • Both dispensers have overheat protection that shuts off power if tank temperatures start to rise to scald levels. For safety.

Noise Level

  • Thanks to TriRing technology, both models deliver silent operation with no audible boiling sounds.


  • The HOT100 has a 2 year limited warranty while the HOT150 comes with a 3 year limited warranty.

As you can see, the HOT100 and HOT150 are largely similar. The main differences come down to the larger 1 gallon tank capacity on the HOT150, and its longer 3 year warranty versus 2 years on the HOT100.

HOT100 Vs. HOT150: Pros and Cons Comparison

InSinkErator HOT100InSinkErator HOT150
– Lower price point– 50% more hot water capacity
– Compact 0.5 gallon tank– Ideal for larger households
– Delivers up to 100 cups– Gets more use before needing reheating
– Fast hot water flow rate– 3 year warranty vs 2 years
– Energy efficient operation– Same fast, quiet performance as HOT100
– Simple under sink installation– Durable stainless steel 1 gallon tank
– Quiet operation with no boiling sounds– Precise 160°F or 180°F temperature
– Overheat protection for safety– Compact under sink footprint
– 2 year limited warranty
– Smaller 0.5 gallon tank capacity– Higher price than HOT100
– More frequent reheating needed– Overkill capacity for smaller households
– Just a 2 year warranty

Choosing Between The HOT100 And HOT150

Here are some tips on choosing between the InSinkErator HOT100 and HOT150 hot water dispensers:

  • Household Size

Consider how many people are in your household and how often you use hot water. The HOT100’s 100 cup capacity is likely sufficient for 1-3 people. But the HOT150’s 150 cup capacity is better for a 3-5 person household to reduce reheating cycles.

  • Budget

The HOT100 costs less than the HOT150. If price is your main concern, the HOT100 provides great value. But the HOT150 delivers more capacity for the extra investment.

  • Space Limitations

While both models have the same compact footprint, make sure you have cabinet space under your sink to accommodate either dispenser.

  • Water Usage Habits

How frequently does your household use hot water for coffee, tea, cooking, oatmeal and more? Higher usage households will benefit from the HOT150’s extra capacity.

  • Warranty Length
InSinkErator HOT100 Hot Water Tank
InSinkErator HOT100 Hot Water Tank

The HOT150 comes with a 3 year warranty versus 2 years for the HOT100.

Consider warranty duration if reliability and longevity are important.

For most smaller households of 1-3 people looking for an affordable dispenser, the HOT100 is likely the better fit.

But if you make many cups of hot drinks daily or have a larger family, the extra capacity and longer warranty of the HOT150 can be worthwhile.

Both deliver hot water instantly, so match the model to your household’s needs.

Frequently Asked Questions (FAQ)

What is the warranty on InSinkErator Hot 100?

The InSinkErator HOT100 dispenser comes with a 2 year limited warranty covering defects in materials and workmanship.

Why is my InSinkErator hot tap not hot enough?

If your InSinkErator dispenser’s water is not getting hot enough, a few things could cause this:
1. Make sure it is set to the highest 180°F temperature setting
2. Descale the tank to clear any mineral buildup
3. Make sure the dispenser is heating properly and check error codes
5. The thermostat may need adjustment or replacement

What is the maximum temperature for the InSinkErator?

The HOT100 and HOT150 InSinkErator dispensers allow temperature settings of either 160°F or 180°F. 180°F is the maximum temperature.

Why is my quick and hot water dispenser not heating?

If your hot water dispenser is not heating at all, some common issues could be:
1. Dispenser is unplugged or circuit breaker is tripped
2. Tank thermostat needs replacement
3. Heating element needs replacement
4. Overheat safety shutoff has been triggered
5. Internal wiring failure
Consult the troubleshooting guide or contact InSinkErator customer service for further help diagnosing causes and remedies if your dispenser is not heating water.

Wrapping Up

The InSinkErator HOT100 and HOT150 are both excellent choices when it comes to instant hot water dispensers for your kitchen.

While the HOT150 model offers a larger 1 gallon tank and 50% more hot water capacity between heating cycles, the HOT100 provides a more affordable option with a compact 0.5 gallon tank still capable of producing up to 100 cups of hot water on demand.

Carefully consider your household’s size and hot water usage habits when deciding between these two dispensers. And match the right capacity to your needs while also factoring in price and warranty length.

Either way, choosing InSinkErator means you’ll enjoy the convenience of piping hot water instantly whenever you need it with quiet, efficient operation.

Ralph Wade

Hey...Ralph is here! So, did you find this article useful? If so, please leave a comment and let me know. If not, please tell me how I can improve this article. Your feedback is always appreciated. Take love :)

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