Tankless hot water heater — Longmont, CO
Last updated: September 24, 2026
What affects the price
The final price for a new water heater depends on a few moving parts. First, you have to choose the right fuel source—gas or electric—and decide if you want to stick with a standard tank or upgrade to a tankless model. We also look at the physical space where it sits and whether your current venting or gas lines meet modern safety codes. If we need to move the unit or upgrade plumbing to get it up to speed, that shifts the labor involved. Exact pricing confirmed free on the call.
About this service
A tankless water heater heats water on demand as it passes through the unit rather than storing it in a large tank. This design saves space and ensures you do not run out of hot water during long showers. You should consider this upgrade if your current tank is failing or if you want to lower your utility bills by heating water only when you actually use it.
While you might not think about hot water as much in the summer, it is a great time to evaluate your system’s health. Because the incoming groundwater is warmer, your heater doesn't have to work as hard, making it a stress-free window to replace an aging unit before you hit the busy autumn season.
Frequently asked in Longmont
What are the benefits of on-demand water heaters?
On-demand water heaters, also known as tankless units, provide hot water only when you need it, leading to significant energy savings compared to traditional tank models. This means you'll never run out of hot water, even during peak usage. Their compact size also frees up valuable space in your home. Pros can help you select the right GPM (gallons per minute) capacity for your needs in Longmont.
Where can I find a water heater service near me in Longmont?
What’s the process for flushing a water heater?
Flushing a water heater involves draining the tank to remove sediment and mineral deposits, which can reduce efficiency and cause noises. Pros will connect a hose to the drain valve and open it, allowing the water to flow out. They may also briefly open the cold water supply to help dislodge debris. Regular flushing is essential for extending the heater's lifespan and maintaining optimal performance.
What's the approximate cost for tankless water heater installation?
The cost for tankless water heater installation in Longmont can vary based on the unit's specifications, such as its GPM (gallons per minute) rating, and the complexity of the installation. This can include necessary upgrades to gas lines, venting, and electrical connections. Pros will provide a detailed quote after assessing your home's specific requirements. Investing in a high-efficiency model offers long-term energy savings.
Are Rinnai tankless water heaters a good option?
Rinnai tankless water heaters are a popular choice known for their reliability, energy efficiency, and consistent hot water delivery. They offer a range of models designed to meet various household demands, providing continuous hot water and reducing energy waste. Pros can help you select the most suitable Rinnai unit for your Longmont home. Their compact design also saves valuable space.
Are propane tankless water heaters suitable for homes without natural gas?
Yes, propane tankless water heaters are an excellent solution for homes in Longmont that do not have access to natural gas lines. They provide the same on-demand hot water benefits and energy efficiency as natural gas models. Pros can help you determine the appropriate tank size and installation requirements for a propane system. This ensures a reliable hot water supply regardless of utility access.
What is the general cost for a tankless water heater?
The cost of a tankless water heater in Longmont depends on factors such as brand, capacity (GPM), and features. Installation costs can also vary depending on the complexity of the setup, including any required modifications to venting or gas lines. Pros will provide a comprehensive quote after evaluating your specific needs and home's infrastructure. High-efficiency models offer long-term energy savings.
Also serving nearby: Boulder · Thornton · Westminster · Arvada · Greeley
More on this: DOE water heating — efficiency and sizing.
Service area details
Serving all of Longmont — population 98,630; about 3,396 residents per square mile across 29.0 sq mi. ZIP codes covered include 80501, 80502, 80503, 80504.
Neighborhoods served in Longmont: Prospect, Old Town, Westview, Countryside, Mountain View — and every surrounding area.
Areas we serve
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