---
title: The Replacement Guide
description: Building a replacement system? Our Replacement Guide walks you through building a replacement system in 5 easy steps.
---
[Skip to content](https://helpcenter.unicosystem.com/knowledge/the-replacement-guide#main-content)
English
Show submenu for translations
![Unico-logo-4c.png\]](https://helpcenter.unicosystem.com/hs-fs/hubfs/Unico-logo-4c.png?height=40&name=Unico-logo-4c.png)
- [Default HubSpot Blog](https://theoutlet.unicosystem.com/blog)
Open main navigation
Close main navigation
- [Default HubSpot Blog](https://theoutlet.unicosystem.com/blog)
- English
Show submenu for translations
- Go to www.unicosystem.com
Go to www.unicosystem.com
Hello. How can we help you?
- There are no suggestions because the search field is empty.
1. [Unico Help Center & Resources](https://helpcenter.unicosystem.com/knowledge?hsLang=en)
2. [UnicoSales App Help](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en)
3. [How the UnicoSales App Works](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#how-the-unicosales-app-works)
# The Replacement Guide
Building a replacement system?
Our **Replacement Guide** walks you through ***building a replacement system*** in **5 easy steps**:
1. **[Existing System](https://helpcenter.unicosystem.com/knowledge/the-replacement-guide#existing-system)**
2. **[Replacement System](https://helpcenter.unicosystem.com/knowledge/the-replacement-guide#replacement-system)**
3. **[Replacement Summary](https://helpcenter.unicosystem.com/knowledge/the-replacement-guide#replacement-summary)**
4. **[Design Check](https://helpcenter.unicosystem.com/knowledge/the-replacement-guide#design-check)**
5. **[Overview](https://helpcenter.unicosystem.com/knowledge/the-replacement-guide#overview)**
#### **1. Existing System**
Input the details of your ***existing system***, including:
- Existing equipment manufacturer
- Existing outdoor tonnage
- System orientation
- System direction
- Does the existing return adapter need replacing?
- Does the system have a heating coil?
**Note:** *if we know the outdoor unit tonnage, the system will give us what we need. So we do ask which equipment model you’re replacing, but the important data for the app to capture is the outdoor tonnage*
#### **2. Replacement System**
Enter the retails of your ***replacement system**, including the new:*
- ***Blower orientation***
- ***Blower direction***
- ***Outlet adapter***
#### **3. Replacement Summary**
You'll then get a summary of all ***suggested replacement equipment*** for the new system.
#### **4. Design Check**
Check other aspects of the existing system to ensure the best compatibility.
You'll also get a calculation for the minimum number of outlets required.
Be sure to input and check each field for accuracy.
#### **5. Overview**
Here is where you'll get your material list for your new system that you can download as a pdf 
You'll also get a breakdown of specs for the old system and full list of specs for the new system.
- [Frequently Asked Questions](https://helpcenter.unicosystem.com/knowledge/frequently-asked-questions?hsLang=en#main-content)
- [Homeowner FAQs](https://helpcenter.unicosystem.com/knowledge/frequently-asked-questions?hsLang=en#homeowner-faqs)
- [Professional FAQs](https://helpcenter.unicosystem.com/knowledge/frequently-asked-questions?hsLang=en#professional-faqs)
- [Technical Specifications](https://helpcenter.unicosystem.com/knowledge/technical-specifications?hsLang=en#main-content)
- [10 - General Information](https://helpcenter.unicosystem.com/knowledge/technical-specifications?hsLang=en#10-general-information)
- [20 - Engineering Specifications](https://helpcenter.unicosystem.com/knowledge/technical-specifications?hsLang=en#20-engineering-specifications)
- [30 - Installation & Maintenance](https://helpcenter.unicosystem.com/knowledge/technical-specifications?hsLang=en#30-installation-maintenance)
- [40 - Application & Sizing](https://helpcenter.unicosystem.com/knowledge/technical-specifications?hsLang=en#40-application-sizing)
- [Technical Notes](https://helpcenter.unicosystem.com/knowledge/technical-specifications?hsLang=en#technical-notes)
- [Replacement Guides](https://helpcenter.unicosystem.com/knowledge/replacement-guides?hsLang=en)
- [Drawings & Submittals](https://helpcenter.unicosystem.com/knowledge/drawings-submittals?hsLang=en#main-content)
- [Blower Modules (1 - 5 ton)](https://helpcenter.unicosystem.com/knowledge/drawings-submittals?hsLang=en#blower-modules-1-5-ton)
- [Coil Modules (1 - 5 ton)](https://helpcenter.unicosystem.com/knowledge/drawings-submittals?hsLang=en#coil-modules-1-5-ton)
- [Vertical Up Flow FCU](https://helpcenter.unicosystem.com/knowledge/drawings-submittals?hsLang=en#vertical-up-flow-fcu)
- [Accessories](https://helpcenter.unicosystem.com/knowledge/drawings-submittals?hsLang=en#accessories)
- [Obsolete Parts](https://helpcenter.unicosystem.com/knowledge/obsolete-parts?hsLang=en#main-content)
- [Discontinued Parts Bulletins](https://helpcenter.unicosystem.com/knowledge/obsolete-parts?hsLang=en#discontinued-parts-bulletins)
- [Discontinued Parts Drawings & Submittals](https://helpcenter.unicosystem.com/knowledge/obsolete-parts?hsLang=en#discontinued-parts-drawings-submittals)
- [Videos](https://helpcenter.unicosystem.com/knowledge/videos?hsLang=en#main-content)
- [Why Choose a Unico System](https://helpcenter.unicosystem.com/knowledge/videos?hsLang=en#why-choose-a-unico-system)
- [Installation](https://helpcenter.unicosystem.com/knowledge/videos?hsLang=en#installation)
- [Product](https://helpcenter.unicosystem.com/knowledge/videos?hsLang=en#product)
- [UnicoSales App Help](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#main-content)
- [How the UnicoSales App Works](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#how-the-unicosales-app-works)
- [Setup Questions](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#setup-questions)
- [General FAQ's](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#general-faqs)
- [Contractors](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#contractors)
- [Distributors](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#distributors)
- [Rep Companies](https://helpcenter.unicosystem.com/knowledge/unicosales-app-help?hsLang=en#rep-companies)
- [Default HubSpot Blog](https://theoutlet.unicosystem.com/blog)
[](https://www.unicosystem.com)
Help Center
Copyright © 2026, Unico Inc.