In this modern era almost everyone is preferring to buy a tankless water heater or upgrading to it. So if you are planning to upgrade your HVAC system with a tankless water heater the first question that comes to your mind is: how much does a tankless water heater cost? On average, a tankless water heater costs between $800 to $3,500 for the unit alone, and $1,500 to $6,500 with installation included. So the answer depends upon a lot of situations like tankless systems are known for their efficiency, endless hot water and long term savings. However the upfront cost varies widely.
So in this comprehensive guide from MileHi HVAC we will break down everything you need to know about including the pricing, replacement cost, installation and other factors that influence the overall expense.
Table of Contents
ToggleWhat Is a Tankless Water Heater?
So you first need to know about the system you are upgrading to. Tankless water heaters are also known as on demand water heaters as they heats and delivers water on demand rather than storing it in tanks like traditional systems. This reduces the loss of energy and provides you continuous hot water whenever you need it.
How Much Does a Tankless Water Heater Cost?

For the alone unit the average tankless water heater cost ranges from $800 to $3500. So when you add the installation the total cost falls between almost $1500 to $6500.
So this wide range depends upon a lot of factors like fuel source, type of unit and complexity of installation.
Cost Breakdown
Unit cost
- Electric tankless heaters: $800 – $2,500
- Gas-powered tankless heaters: $1,500 – $3,500
So this price only reflects the base tankless water heater cost excluding the labor cost and other materials.
Tankless Water Heater Installation Cost
Now the tankless water heater installation cost ranges from almost $700 to $3000 depending upon alot of factors like:
- Ventilation requirement
- Labour charges
- Upgrading electrical or gas lines
- Installation location
Also remember that gas units cost more as compared to electric systems because of the venting and piping requirements.
Total Installation Price
The overall tankless water heater install price(unit+labor) falls between $2000 to $6500.
So complex installation or higher capacity systems must pay even higher costs.
Cost to Replace a Tankless Water Heater
There is also another situation like if you already have a tankless system and need a new one so the cost to replace tankless water heater is usually less than the overall fresh installation.
The average replacement cost is $1500 to $4000.
This is due to:
- Less labor is required
- Connections are already in place
- There is no need of major upgrades
But the cost to replace tankless water heater can increase like if you are switching between the electric and gas systems.
Read More: How to Install Tankless Water Heater?
Factors That Affect Tankless Water Heater Costs

Fuel type
Electric systems are usually cheaper upfront but their operating cost is much higher.
Gas systems are more costly than electric but are often more efficient in the long term.
Home Size & Water Demand
Like larger homes require systems having more power which increases the tankless water heater cost.
Installation complexity
The tankless water heater cost will also increase if your home requires some certain upgrades like gas lines, wiring and venting.
Brands and quality
Premium brands offer warranties and better durability but come with higher tankless water heater install price.
Labor rates
Professional installation also varies by expertise and location. Therefore at MileHi HVAC we ensure competitive pricing and expert services.
Is a Tankless Water Heater Worth the Cost?

Yes absolutely like if you are looking for:
- Lower energy bills
- Longer lifespan
- Endless hot water
- Compact design
So even though the tankless water heater installation cost seems higher, the efficiency and durability provides excellent value over time.
Tips to Save on Installation
- Select the right unit size of your home
- Consider the electric if gas installation is costly
- Compare multiple quotes
- Work with the professionals like MileHi HVAC
Why to choose us
At MileHi HVAC we have certified professionals who offer you services like:
- Expert installation and replacement
- Honest pricing with no hidden fees
- Affordable tankless water heater install price options.
- Professional guidance
Our team is always ready to help you in all situations like whether you are installing or evaluating the cost to replace a tankless water heater.
Final Thoughts
How much does a tankless water heater cost then? Your home, system type and installation requirements will determine the answer but efficiency, convenience and long-term savings frequently make the investment worthwhile.
When it comes to your next tankless water heater replacement in Denver CO project, you can rely on MileHi HVAC for dependable service and affordable prices.
FAQS
What is the total cost of a tankless water heater, including installation?
Depending on the item and installation intricacy, the overall cost usually falls between $2,000 and $6,500.
What makes installing a tankless water heater so expensive?
Gas lines, venting, and electrical improvements are all possible during installation, which raises labor and material expenses.
How much does it typically cost to install a tankless water heater?
Installing a tankless water heater typically costs between $2,000 and $6,500.
What is the price of replacing a tankless water heater?
Depending on the equipment and labor needed, the cost to replace a tankless water heater falls between $1,500 and $4,000.
Is a tankless system ultimately less expensive?
Yes, tankless systems frequently result in cost savings over time because of their extended lifespan and energy efficiency.
What is the lifespan of tankless water heaters?
Systems are a long-term investment because they typically last 15 to 25 years.

