Mini Split Sizing Calculator

Looking to size a ductless mini-split for your next HVAC project?

ACWholesalers' mini-split sizing calculator is the best, easiest way to get accurate load calculations, so you get the right equipment every time!

After you've entered the room information, you will be able to build the perfect mini-split system for optimal comfort and efficiency.

For multi-unit systems, simply fill out the calculator for each room and add the load requirements together.

Step 1. Basic Info

Step 2. Room Info

Step 3. Construction

Step 4. Results

Total Load Calculations

Start Over

Cooling Load:

Heating Load:

Basic Room & Home Information

Room Size:

Zip Code:

Room Type:

Building Age:

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* For more accurate load calculations, you can edit the detailed information below.

Skip To Results

Tell Us About Your Home

Fill out all of the fields provided to calculate your heating and cooling loads. We'll use that information to help you find the right mini split system for your home.

Room Size

ZIP Code

Building Age Select Building Age Before 1975 1975-2000 After 2000

Select the approximate age range of your home. We will use this to make an estimate of the quality of insulation of your home.

Room Type Select Room Type Bedroom - Master Bedroom - Other Garage Kitchen Living Room Office Other Room Sun Room

Because different types of rooms are used differently, they have different heating and cooling needs.

Calculate Load Estimates

Temperature Information

Outdoor Design Temp. High: 90°F | Low: 10°F

Outdoor Design Temp. determined by ZIP Code.

Desired Indoor Cooling Temp.

Desired Indoor Heating Temp.

Next: To Wall Details

Wall Details

Wall Direction

North North East East South East South South West West North West

Exposed No Yes

Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.

Width (ft.)

Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.

Wall Direction

East South East South South West West North West North North East

Exposed Yes No

Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.

Width (ft.)

Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.

Wall Direction

South South West West North West North North East East South East

Exposed Yes No

Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.

Width (ft.)

Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.

Wall Direction

West North West North North East East South East South South West

Exposed Yes No

Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.

Width (ft.)

Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.

Next: To Window Details

Window Details

Wall Direction

North

Windows

We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.

French Doors

We assume French Doors are 3'x7'. Each half of a double door should be counted separately.

Sliding Doors

We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.

Wall Direction

East

Windows

We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.

French Doors

We assume French Doors are 3'x7'. Each half of a double door should be counted separately.

Sliding Doors

We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.

Wall Direction

South

Windows

We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.

French Doors

We assume French Doors are 3'x7'. Each half of a double door should be counted separately.

Sliding Doors

We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.

Wall Direction

West

Windows

We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.

French Doors

We assume French Doors are 3'x7'. Each half of a double door should be counted separately.

Sliding Doors

We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.

Next: To Ceiling Details

Garage Door Details

# of Garage Doors 0 1 2 3 4 5

Each single garage door should be counted as 1 and each double garage door should be counted as 2.

Next: To Ceiling Details

Ceiling Details

Exposed Yes No

Select 'Yes' if the ceiling separates your space from the outdoors, an attic, or any other unconditioned space. Otherwise, if there is another conditioned room above your space, select 'No'.

Height (ft.)

Enter the height of your ceiling. If you have a sloped, vaulted, or any other type of non-flat ceiling, enter the approximate average ceiling height.

Next: To Floor Details

Floor Details

Exposed Yes No

Select 'Yes' if the floor separates your space from the outdoors, an unconditioned crawlspace or basment, or is a slab on grade. Otherwise, if your space is over a conditioned room, select 'No'.

Continue to Construction

Wall & Window Details

Wall Type Frame Wall (Siding or Stucco) Frame Wall (Brick Facade) Basement Wall (Below Grade)

Wall Insulation Quality No Insulation Fair Insulation Excellent Insulation

Window Type Single Pane Two Pane Two Pane Low-E

Garage Door Details

Garage Door Insulation Quality Uninsulated Insulated

Ceiling Details

Ceiling Type Ceiling Under Attic Sloped Ceiling (No Attic) Flat Ceiling (No Attic)

Ceiling Insulation Quality No Insulation Fair Insulation Excellent Insulation

Floor Details

Floor Type Floor Over Exterior or Garage Floor Over Basement or Crawlspace Slab On Grade Slab Below Grade

Floor Insulation Quality No Insulation Fair Insulation Excellent Insulation

Submit & View Results

Previous

Basic Room & Home

Room Type

Room Size

ZIP Code

Building Age

Temperature

Edit

Avg. Outdoor Temp. High

°F

Avg. Outdoor Temp. Low

°F

Desired Indoor Cooling

°F

Desired Indoor Heating

°F

Walls

Edit

Wall Type

Wall Insulation Quality

North Wall Exposed Area

East Wall Exposed Area

South Wall Exposed Area

West Wall Exposed Area

Garage Door

Edit

# of Garage Doors

Garage Door Insulation Quality

Windows

Edit

Window Type

North Wall

East Wall

South Wall

West Wall

Ceiling

Edit

Ceiling Exposed

Ceiling Insulation Quality

Ceiling Type

Floor

Edit

Floor Exposed

Floor Insulation Quality

Floor Type

Load Results (BTU/hr)

Cooling load

Wall

Window

Ceiling

Floor

Bay

Infiltration

Internal

MRA

Moisture Removal Allowance: It is typical for roughly 30% of your air conditioner's capacity to be used to reduce the humidity in your home.

Total

Heating load

Wall

Window

Ceiling

Floor

Bay

Infiltration

Total

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Disclaimer: This sizing tool, although based on a version of the ACCA Manual J, is for informational use and is intended only as a guide to assist with finding the best product for your needs. Since the calculations are based on the information provided, ACWholesalers assumes no responsibility for inaccuracies resulting from improperly sized equipment. For a complete, professional sizing estimate, please call us at 866-631-6389.

	Call Us Toll Free: 1 (866) 631-6389 Monday - Thursday: 8am - 6pm CST Friday: 9am - 5pm CST Saturday and Sunday: Closed
Basic Room & Home Room Type Room Size ZIP Code Building Age	Temperature Avg. Outdoor Temp. High Avg. Outdoor Temp. Low Desired Indoor Cooling Desired Indoor Heating
Walls Wall Type Wall Insulation Quality North Wall Exposed Area East Wall Exposed Area South Wall Exposed Area West Wall Exposed Area Ceiling Ceiling Exposed Ceiling Insulation Quality Ceiling Type	Windows Window Type North Wall East Wall South Wall West Wall
Floor Floor Exposed Floor Insulation Quality Floor Type
Load Results (BTU/hr) Cooling load Heating load Wall Window Ceiling Floor Infiltration Internal MRA * Total	* MRA - Moisture Removal Allowance: It is typical for roughly 30% of your air conditioner's capacity to be used to reduce the humidity in your home. Disclaimer: This sizing tool, although based on a version of the ACCA Manual J, is for informational use and is intended only as a guide to assist with finding the best product for your needs. Since the calculations are based on the information provided, ACWholesalers assumes no responsibility for inaccuracies resulting from improperly sized equipment. For a complete, professional sizing estimate, please call us at 866-631-6389.

	Call Us Toll Free: 1 (866) 631-6389 Monday - Thursday: 8am - 6pm CST Friday: 9am - 5pm CST Saturday and Sunday: Closed
Basic Room & Home Room Type Room Size ZIP Code Building Age	Temperature Avg. Outdoor Temp. High Avg. Outdoor Temp. Low Desired Indoor Cooling Desired Indoor Heating
Walls Wall Type Wall Insulation Quality North Wall Exposed Area East Wall Exposed Area South Wall Exposed Area West Wall Exposed Area Ceiling Ceiling Exposed Ceiling Insulation Quality Ceiling Type	Windows Window Type North Wall East Wall South Wall West Wall
Garage Door # of Garage Doors Garage Door Insulation Quality	Floor Floor Exposed Floor Insulation Quality Floor Type
Load Results (BTU/hr) Cooling load Heating load Wall Window Ceiling Floor Bay Infiltration Internal MRA * Total	* MRA - Moisture Removal Allowance: It is typical for roughly 30% of your air conditioner's capacity to be used to reduce the humidity in your home. Disclaimer: This sizing tool, although based on a version of the ACCA Manual J, is for informational use and is intended only as a guide to assist with finding the best product for your needs. Since the calculations are based on the information provided, ACWholesalers assumes no responsibility for inaccuracies resulting from improperly sized equipment. For a complete, professional sizing estimate, please call us at 866-631-6389.

How to Use the AC Size Calculator

To use our AC sizing calculator, follow these steps:

1. Input basic info, including the square footage of your room, building age (to determine what kind of insulation you might have), room type, and ZIP Code.
   
   
2. Give more details about the room you want to condition. These include your desired temperatures and information about your walls, windows, ceiling, and floor. For example, if your space has three exposed walls, it'll take more energy to keep the temperature comfortable.
   
   
3. Add construction details relating to the efficiency of your doors, windows, and floor. This is the section where you can add details about insulation and building materials.
   
   
4. Receive your results, which will include estimated heating and cooling loads that can help you choose the right mini split for your room.
   
   

Using our AC sizing calculator will get you on the right track to total home comfort. If you need more help understanding the results, please contact us.