Gas tankless water heater — Boulder, CO
Last updated: September 24, 2026
What affects the price
Replacing a water heater involves several variables that change the final bill. The main factors are the type of unit you choose—like standard tank models versus tankless systems—and the fuel source, whether gas or electric. Installation complexity also plays a role, especially if we need to update venting, gas lines, or electrical wiring to meet current building codes. Relocating a unit or upgrading to a higher capacity will also shift the bottom line.
About this service
This unit uses a powerful gas burner to instantly heat water as it travels through a heat exchanger. It is ideal for larger households that need a continuous flow of hot water without waiting for a tank to refill. These units require proper venting and gas line capacity, which impacts the initial investment.
Frequently asked in Boulder
What is the installation cost for a tankless hot water heater in Boulder?
The installation cost for a tankless hot water heater in Boulder depends on the unit's size and features. It also depends on the complexity of the installation. Factors like plumbing modifications and venting requirements are considered. The pros will provide a free, detailed quote after assessing your home's specific needs.
What does flushing a water heater involve?
Flushing a water heater involves draining the tank to remove sediment and mineral buildup. This process helps maintain efficiency and prevents corrosion. Regular flushing can extend the life of your water heater. The pros can perform this maintenance for you to ensure optimal performance. It's a key part of upkeep.
Should I install an expansion tank on my water heater?
Installing an expansion tank on your water heater is often recommended. It helps manage pressure changes in your plumbing system. This can prevent damage to pipes and the heater itself. The pros can assess if your Boulder home's system requires one. They'll explain its importance for system longevity and safety.
What should I know about AO Smith water heaters?
AO Smith offers a wide range of water heaters, known for their reliability. When considering an AO Smith model for your Boulder home, think about your hot water needs. They have various tank sizes and tankless options. The pros can help you choose the best AO Smith unit. They'll explain its features and benefits.
What's involved in replacing a water heater?
Water heater replacement involves removing the old unit and installing a new one. The pros will assess your home's hot water demands. They'll help you select the right size and type of replacement heater. The service includes all necessary connections and safety checks. This ensures efficient and safe operation.
What are the benefits of a hot water heater?
A hot water heater provides essential hot water for daily tasks like showering, washing dishes, and laundry. It ensures comfort and convenience in your home. Modern water heaters offer improved energy efficiency, which can lower utility bills. The pros can help you choose a unit that meets your needs.
What kind of natural gas water heaters are available?
Natural gas water heaters come in storage tank models and tankless (on-demand) units. Storage tank heaters keep a reserve of hot water. Tankless heaters heat water as needed, providing continuous hot water and higher efficiency. The pros can explain which type is best for your Boulder household.
Also serving nearby: Longmont · Westminster · Arvada · Thornton · Lakewood
More on this: DOE water heating — efficiency and sizing.
Service area details
Serving all of Boulder — population 105,898; about 3,937 residents per square mile across 26.9 sq mi. ZIP codes covered include 80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308.
Neighborhoods served in Boulder: Downtown Boulder, University Hill, Table Mesa, Gunbarrel, Newlands — and every surrounding area.
Areas we serve
Browse by state, then city.