How to Size a Whole House Humidifier?

Joseph is an HVAC technician and a hobbyist blogger. He’s been working as an HVAC technician for almost 13 years, and he started blogging just...Read more

If you’re considering a whole-house humidifier, you’ll need to choose the right size for your home. The first step is to determine the square footage of your home. This can be done by measuring the length and width of each room and multiplying them together.

Once you have the square footage, multiply it by 20%. This will give you the minimum capacity that your humidifier should have.

  • Decide the level of humidity you want in your home
  • Find out the square footage of your home
  • Divide the square footage of your home by 1,500
  • The number you get is how many gallons per day your humidifier should be able to output
  • 5 Choose a humidifier with a gallon output that is close to the number you calculated in step 4

What Size Humidifier Do I Need Per Square Foot?

Humidifiers come in all shapes and sizes. But how do you know which one is right for your home? The size of the humidifier you need will depend on the square footage of the space you want to humidify.

For example, a 500-square-foot room will require a different sized humidifier than a 2,000-square-foot home. To calculate the size of humidifier you need per square foot, simply divide the square footage of your space by 500. This will give you the number of gallons per day that your humidifier should be able to output.

For example, if you have a 1,000-square-foot home, you would need a two-gallon humidifier. A 2,000-square-foot home would require a four-gallon humidifier. Of course, this is just a general guide.

The actual size of humidifier you’ll need also depends on factors like the climate you live in and how dry your air is to begin with.

What Size Humidifier Do I Need for 800 Square Feet?

When it comes to humidifiers, size really does matter. If you have a small space, like an apartment or office, then a personal humidifier might be all you need. But if you have a larger space, like a home or store, then you’ll need a commercial-grade humidifier.

For example, the Vornado Evaporative Whole Room Humidifier is designed for spaces up to 1,000 square feet. The rule of thumb is that you should have at least one gallon (3.8 liters) of water per day for every 100 square feet (9.3 m^2) of space. So, for an 800 square foot (74 m^2) room, you would need at least 8 gallons (30 liters) of water per day.

There are two main types of humidifiers: evaporative and ultrasonic. Evaporative humidifiers work by using a fan to circulate air through a wet wick filter. The water in the filter evaporates into the air and increases the humidity level in the room.

Ultrasonic humidifiers use high frequency vibrations to create a fine mist that is dispersed into the air. Both types of humidifiers are effective at increasing humidity levels, but they have different pros and cons. Evaporative humidifiers are less expensive and easier to maintain than ultrasonic humidifiers, but they can be noisy and may not be as effective in very dry climates.

Ultrasonic humidifiers are much quieter than evaporativehumidifiers and can work well in any climate, but they require regular cleaning to prevent mold growth and can be more expensive upfront.

Can a Humidifier Be Too Big?

A humidifier can be too big if it is not the right size for the room that it is in. If a humidifier is too big, it will not be able to properly humidify the air and may even make the room feel more dry. It is important to choose a humidifier that is the right size for the room so that it can work effectively.

How Many Gallons Does a Whole House Humidifier Use?

A whole-house humidifier is a great way to improve the air quality in your home and make it more comfortable to live in. But how much water does a whole-house humidifier use? The answer depends on the size of the unit and the amount of humidity you want to add to your home.

A small unit may use as little as 1 gallon of water per day, while a larger unit can use up to 10 gallons per day. If you’re not sure how much humidity you need to add to your home, a good rule of thumb is 30-50% relative humidity. You can measure the relative humidity in your home with a hygrometer.

Whole-House Humidifiers: Benefits, Types and Costs

Humidifier Sizing Calculator

If you’re looking for a quick and easy way to find the right size humidifier for your home, look no further than the Humidifier Sizing Calculator from Air & Water. This free online tool takes the guesswork out of selecting a humidifier by allowing you to input key information about your space, such as square footage, ceiling height, and number of occupants. In just a few clicks, you’ll have a personalized recommendation for the best type of humidifier to meet your needs.

No matter what kind of space you’re trying to keep comfortable, the Humidifier Sizing Calculator is a valuable resource that can help ensure you choose the right product for the job. Give it a try today!

What Size Humidifier for 1,200 Sq Ft

When it comes to choosing a humidifier, size is an important consideration. If you have a 1,200 square foot home, you’ll need a humidifier that can cover that entire space. There are a few different options available on the market, but we recommend the Honeywell HE360A1075 Whole House Humidifier.

This unit can cover up to 3,000 square feet and features an automatic humidity control system. It’s also Energy Star certified, so you can be sure it won’t run up your energy bill.

Whole House Humidifier Pros And Cons

Whole-house humidifiers offer many potential benefits for your home. They can help to improve air quality and make your home more comfortable. However, there are also some potential drawbacks to consider before installing one in your home.

Whole-house humidifiers work by adding moisture to the air. This can help to reduce static electricity, eliminate odors, and make your skin feel better. Additionally, humidified air can help to relieve congestion and soothe dry throats and noses.

There are two main types of whole-house humidifiers: evaporative and steam vaporizers. Evaporative models use a fan to circulate moistened pads or wicks, while steam vaporizers heat water to create steam that is then distributed through the ductwork of your home. Pros:

1. Can improve air quality by reducing static electricity, eliminating odors, and making your skin feel better. 2. Can help relieve congestion and soothe dry throats and noses. 3. Generally less expensive than other types of humidifiers (such as portable units).

Cons: 1. Requires regular maintenance ( such as replacing pads or wicks) . 2. Can be noisy (depending on the type).

Whole Home Humidifier Installation

If you are considering a whole home humidifier for your home, there are a few things to keep in mind during installation. First, you will need to determine the proper location for the humidifier. It is important to place the humidifier away from any air vents or return air grilles to avoid recirculating dry air.

The unit should also be level and on a firm surface. Next, you will need to connect the water supply line to the humidifier. Be sure to use copper or plastic tubing that is less than one inch in diameter.

If using copper tubing, it is important to apply soldering paste or flux to all connections and allow them to dry before soldering. Once the water supply line is connected, turn on the water valve slowly until water begins flowing into the humidifier reservoir. Now it’s time to connect the power supply and install any batteries if required by your model of humidifier.

After everything is plugged in and turned on, check all connections for leaks before proceeding. Finally, set the humidity level on your humidifier according to manufacturer recommendations and enjoy improved indoor air quality!


If your home is too dry, a whole-house humidifier may be the solution. But how do you know what size humidifier you need? The first step is to figure out the square footage of your home.

Once you have that number, divide it by 2,500. This will give you the approximate gallons per day (GPD) output that you’ll need from your humidifier. For example, if your home is 2,000 square feet, you’ll need an output of 0.8 GPD (2,000/2,500=0.8).

Once you know the GPD output you need, select a humidifier with that output or higher. It’s always better to err on the side of too much moisture than not enough!

Joseph is an HVAC technician and a hobbyist blogger. He’s been working as an HVAC technician for almost 13 years, and he started blogging just a couple of years ago. Joseph loves to talk about HVAC devices, their uses, maintenance, installation, fixing, and different problems people face with their HVAC devices. He created Hvacbuster to share his knowledge and decade of experiences with people who don’t have any prior knowledge about these devices.

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