Tankless Water Heater Installation Guide: What to Expect and How to Prepare
Tankless water heaters are changing how homeowners think about hot water. They’re compact, energy-efficient, and offer nearly endless hot water on demand.
But switching to a tankless system isn’t as simple as unplugging one and plugging in another. It takes some prep, and knowing what to expect can make all the difference.
Whether you’re still researching or your install date is already on the calendar, this guide will help you walk into the process with confidence.
Why Choose a Tankless Water Heater?
Before we dive into installation, let’s quickly revisit why tankless might be the right move for your home.
- Efficiency: Tankless units only heat water when you need it. No standby heat loss.
- Space-Saving: Wall-mounted units free up floor space, perfect for smaller utility rooms.
- Longevity: With proper maintenance, tankless systems can last over 20 years.
- Endless Hot Water: Great for large families or households with multiple bathrooms.
Still, these benefits depend on proper installation and setup. That’s where preparation becomes key.
Step One: The Pre-Installation Site Visit
Most reputable HVAC or plumbing companies won’t skip this part. A technician will assess your current system and home layout. They’re looking for:
- Gas line capacity or electric panel readiness
- Proper ventilation and combustion air supply
- Drainage location for condensate (for high-efficiency units)
- Ideal unit placement for access and performance
During this visit, expect to discuss your water usage habits. That helps the technician size the system appropriately, ensuring you won’t run out of hot water or overspend on capacity you don’t need.
What to Do Before Installation Day
There are a few things you can do to make installation day smooth for everyone involved.
1. Clear the Workspace
Remove any items blocking access to your existing water heater. Whether it’s a utility closet or garage, technicians will need space to work.
2. Know Your Shutoff Valves
If possible, locate and test your home’s water and gas shutoff valves ahead of time. This can speed up the prep and improve safety.
3. Ask Questions
If you have concerns about energy usage, warranty coverage, or ongoing maintenance, now’s the time to ask. Good companies will walk you through every detail.
What Happens During Installation?
Depending on the complexity of the setup and your home’s infrastructure, installation can take anywhere from 4 to 8 hours. Here’s what’s involved:
- Removal of Old Unit: Your traditional tank will be safely drained and removed.
- Upgrading Utilities: Tankless units often require upgraded gas lines or electric circuits.
- Mounting the Unit: Wall mounting typically frees up space, but placement matters for venting and efficiency.
- Venting Setup: Proper venting is critical for safety and function—especially for gas models.
- Water and Gas Connections: Technicians will install isolation valves to make future servicing easier.
- System Testing: Once connected, the installer will test the unit, inspect for leaks, and verify temperature settings.
You might experience a temporary water or power shutoff during this process. A quality crew will let you know in advance and keep the disruption minimal.
After Installation: Final Checks and Owner Training
With the unit up and running, the technician will walk you through how everything works. This usually includes:
- Adjusting temperature settings
- How to flush the system (a must-do at least once a year)
- Resetting the unit if needed
- Checking the filter screen for debris
They should also leave you with a user manual, service schedule, and information about your warranty.
Common Issues to Watch For
Even with a top-tier install, it’s smart to keep an eye out for a few things:
- Low Water Pressure: Sometimes related to sediment or a clogged filter screen
- Fluctuating Temperature: May point to a sizing issue or need for descaling
- Error Codes: These vary by brand, but your manual will include a full list
Most issues can be prevented with regular maintenance and by hiring a licensed, experienced professional.
How to Maintain Your Tankless System
Maintaining a tankless water heater isn’t difficult, but it is essential. Here’s what’s typically recommended:
- Annual Descaling: Especially in areas with hard water. Calcium can build up in the heat exchanger.
- Filter Cleaning: This screens out debris that might otherwise clog the inlet.
- Flue Checkups: If your unit is gas-powered, make sure venting stays clear and sealed.
- Professional Inspection: Have a technician conduct a thorough inspection once a year. They’ll catch minor issues before they become expensive repairs.
Neglecting maintenance can reduce efficiency, damage the unit, or even void your warranty.
Final Thoughts: The Cost of Installation
Tankless water heater installation costs vary, often ranging from $2,500 to $4,500, depending on:
- Whether upgrades to your home’s gas or electrical system are needed
- The brand and model you select
- Complexity of the installation site
- Local labor rates
While the upfront cost can seem high, many homeowners find that lower energy bills and fewer long-term issues make it a worthwhile investment.
Ready to Go Tankless?
Whether you’re upgrading for efficiency, space, or comfort, installing a tankless water heater is one of the smartest home improvements you can make.
Need help choosing the right system or want to schedule a site visit? Contact our team here at A Quality today at 623-853-1482 and experience a service that puts your best interests at heart, regardless of the circumstances.
