DIY vs Professional Installation
3 min read
Updated February 1, 2026
Warning: Mysa for In-Floor Heating operates on line voltage (120V or 240V). Working with line voltage electricity is dangerous and can result in serious injury or death. If you're not confident in your electrical skills, hire a licensed electrician.
---
When DIY Installation Is Okay
You may attempt a DIY installation if all of the following apply:
- You're comfortable with electrical work — You have experience reading wiring diagrams and working safely with electricity
- Your system is 120V single-pole — You're wiring to a 120V circuit with a single-pole breaker
- You understand the basics — You know the difference between LINE, LOAD, ground, and neutral connections
- You can verify voltage — You have a voltmeter and can confirm the circuit voltage before starting
- You'll follow all safety steps — You'll turn off the breaker, test for power, and verify your connections
If you meet all these criteria, you can proceed with installation. However, we recommend reviewing our Wiring Reference Guide before you start.
---
When You Need to Hire an Electrician
You must hire a licensed electrician if:
- Your system is 240V — 240V circuits have more complex wiring requirements and higher voltage risks
- Your system uses a double-pole breaker — This indicates a 240V circuit requiring professional-grade electrical knowledge
- You're unfamiliar with electrical wiring — Don't guess on electrical connections. Mistakes can damage equipment or cause fires
- You're uncomfortable working with electricity — Your safety is more important than saving money
- You're upgrading existing wiring — Adding new circuits or modifying your electrical panel requires a licensed electrician
- Local codes require it — Some jurisdictions require a licensed electrician for any thermostat installation involving electrical work
---
Why Professional Installation Matters
A licensed electrician ensures:
- Proper voltage identification — They'll verify your circuit is actually 120V or 240V using a voltmeter
- Correct wiring — LINE and LOAD connections are critical. A single mistake prevents your thermostat from powering on
- Safety compliance — They follow local electrical codes and ensure your installation is safe
- Code inspection — Many areas require electrical work to pass inspection before use
- Warranty protection — Professional installation confirms you followed proper procedures if issues arise
---
Next Steps
Ready to install yourself?
- Review our Wiring Reference Guide for terminal connections
- Use our Pre-Installation Checklist to verify your setup
Hiring an electrician?
- Save our Wiring Reference Guide and Pre-Installation Checklist to share with them
- Have your floor heating system specs and wattage ready
- Ask if they've installed smart thermostats or in-floor heating systems before
---
Need Help?
If you have questions about whether DIY installation is right for you, or if you need electrician recommendations, contact our support team:
Email: install@getmysa.com
We're here to help you make the right choice for your installation.