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SwiftSize

SwiftSize

Quick Heat Load Calculator

3 ratings
6 reviews
💼 Business
📊 Productivity
$9.99

Details

  • Released
  • Updated
  • January 14, 2015
  • August 1, 2025

Features

Developer

Design Comfort
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SwiftSize screenshot #1 for iPhone
SwiftSize screenshot #2 for iPhone
SwiftSize screenshot #3 for iPhone
iphone
ipad
⭐6
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦w/o updates
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About

This HVAC tool quickly calculates residential heating and cooling loads on-site. It streamlines the process for professionals, allowing for faster equipment sizing and more customer consultation time. Generate shareable PDF reports of your calculations.

✓Quick heat load calculations
✓On-site measurements
✓Accurate equipment sizing
✓Shareable PDF reports
✓Minimizes engineering time
✓Equipment changeout focus
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What's New in SwiftSize

2.1.2

August 1, 2025

Fixed keyboard clipping on iPad

User reviews

Most RecentHighest RatedLowest Rated

Not ready for prime time

I used to use a different app for load calculations. This one gave an inaccurate calculation and there isn’t a way to figure out what is wrong. I started with my own house and know the exact load due to temperatures hitting design temps for 2 days straight. This said I needed 66% more capacity.
jasin sjasin s

Equipment sizing

Great accurate app for ensuring I’ve got the right equipment for the job, loads are precise and the video is super helpful to understand the way to use the app.
bignobygbignobyg

Paid for junk

Poorly designed won’t save anything or allow the information be printed off so we can give it to an inspector. What a waste of money and time for what so I can buy an app that does work.
valthazorvalthazor

Do not download

This app does not do what it says. Interface is very poorly designed.
RevBRevB

Skip this app

Does not save data, incomplete insulation options. This is not a finished product.
HotpuppyHotpuppy

FAQ

What is SwiftSize used for?

SwiftSize is an HVAC load calculator designed for residential equipment changeouts. It helps professionals quickly measure home exposures and accurately size heating and air conditioning equipment.

How fast can I calculate heat loads with SwiftSize?

SwiftSize is designed to perform complete heat loads in mere minutes. The developer suggests that if it takes more than 10 minutes, you are likely not using it efficiently.

Can SwiftSize be used for new construction?

No, SwiftSize is specifically intended for the equipment changeout market, not new construction. It is not a comprehensive room-by-room heat loss/gain/CFM calculator.

Does SwiftSize generate reports?

Yes, SwiftSize now generates a shareable PDF report of your heat load calculations, which can be useful for documentation and customer communication.

What devices does SwiftSize support?

SwiftSize is available for iPhone, iPad, and iPod devices. It is designed to be used on the go.

How much does SwiftSize cost?

SwiftSize is a paid application, priced at $9.99. This one-time purchase grants you access to its features.

When was SwiftSize last updated?

The latest version of SwiftSize, 2.1.2, was last updated on August 1, 2025. This indicates ongoing support and potential improvements.

Does SwiftSize have ads?

No, SwiftSize does not contain advertisements. As a paid application, it offers an ad-free experience for users.