Warning: This model should ONLY be used for selecting variable capacity heat pumps.
It also only covers applications in Manual S from sections N2.3.4.2 and N2.3.4.3 and N2.5 for furnace in dual-fuel setup
It does NOT contain logic to handle single or two-stage heat pumps
Use at your own risk. This tool is provided 'as is' without any warranty, expressed or implied.
First, download the Amply Manual S tool
You can find the free Amply Manual S tool here.
The tool provides:
Automatic interpolation of equipment performance data
Simple spreadsheet inputs
Easily document your work for rebate or permit submissions
Auxiliary electric heat sizing
Dual-Fuel furnace option
Equipment data reference to save your equipment performance data
This how-to video walks you through how to use it
The tool and video provide a bridge from the Amply Manual J report to equipment selection via Manual S.
Frequently Asked Questions
1. Is the Spreadsheet tool compatible with Google Sheets?
Unfortunately, it uses some special formulas that are not compatible with Google Sheets at the moment. It is compatible with Microsoft Excel and Apple Numbers. We hope to make it more broadly compatible in the future.
2. What if I have more than one outdoor unit for the project ?
You should be running a Manual S for each individual outdoor unit that you have for the project.
Example: Let's say one system serving the second story of the home and another system serving the first story of the home.
The total 1st story load calcs are used for inputs in Manual S for sizing the outdoor unit serving the 1st story
The total 2nd story load calcs sizing the second outdoor unit
If you look in the cartoon view of the home and tap on one of the stories in the lower right-hand corner, you can see that we've done the math for you of adding up all the loads for that story:
Learn more about the full Manual S procedure
Write us at [email protected] or text us at +1-844-789-7009 with any questions
🎧 Related listening: Ep. 60 — Designing Heat Pump Systems That Won't Come Back to Haunt You, where Eric Fitz walks through the Manual S sizing ratios and equipment selection trade-offs behind this tool.