Top Tankless Water Heater Service Companies in Aurora, Colorado Ranked

A tankless water heater provides an efficient, on-demand supply of hot water for your Aurora home, eliminating the standby energy losses of a traditional storage tank. This technology matters for homeowners seeking lower utility bills, endless hot water, and valuable floor space savings. This guide will help you understand the key considerations, costs, and local requirements for installing or servicing an on-demand water heater, connecting you with the information needed to find qualified local professionals.

High 5 Plumbing, Heating, Cooling & Electric

15710 W Colfax Ave, Golden, CO 80401

High 5 Plumbing, Heating, Cooling & Electric is a full-service plumbing company serving Denver, CO. They provide a wide range of plumbing services including water heater installation and repair, drain cleaning, sewer line repair, leak detection, and gas line installation. The company uses advanced video technology for sewer camera inspections and offers trenchless sewer repair to minimize excavation. They also specialize in hydro jetting to clear blocked drains efficiently. High 5 Plumbing is licensed for gas plumbing and installs energy-efficient tankless water heaters. The company has received recognition such as the Angi Super Service Award and a BBB Torch Award for Ethics. They provide 24/7 emergency response for urgent plumbing needs.

5.0

1.7k Reviews

Big Apple Plumbing LLC - Broomfield, CO

1022 Depot Hill Rd Unit 10, Broomfield, CO 80020

Big Apple Plumbing LLC - Broomfield, CO provides a wide range of plumbing services in Denver, CO, including drain cleaning, sewer line repair, water heater installation and repair (tank and tankless), leak detection, gas line installation, sump pump repair, and repiping. The company serves both residential and commercial clients, handling routine maintenance, emergency repairs, and new installations with licensed plumbers. They specialize in sewer line services and offer 24/7 emergency plumbing solutions to address urgent issues like burst pipes and leaks. Big Apple Plumbing is locally owned and operated, with a focus on safety and code compliance. Their team is experienced in gas line installations and water heater replacements, ensuring efficient and reliable service. The company is known for upfront pricing, timely arrivals, and clear communication, serving Broomfield and surrounding areas including Anthem, The Broadlands, and Interlocken/FlatIron Crossing.

5.0

490 Reviews

Walk on Water Plumbing LLC

9994 Silver Maple Way, Highlands Ranch, CO 80129

Walk on Water Plumbing LLC is a family-owned plumbing business based in Highlands Ranch, serving the South Metro Denver area including Denver, CO. They specialize in water heater repair, installation, and tankless water heater services. The company is led by a licensed master plumber with over 15 years of experience, supported by a team with more than 35 years in plumbing. Their services cover a range of residential plumbing needs with a focus on tankless water heaters, which provide instant hot water without waiting. Walk on Water Plumbing LLC is a licensed and insured contractor with a multi-generation legacy in the plumbing industry.

5.0

480 Reviews

Water Heater Colorado

4757 S Fultondale Way, Aurora, CO 80016

Water Heater Colorado serves homeowners in Denver, CO, and the Colorado Springs metro area, specializing in water heater installation, replacement, and repair. They focus on both tank and tankless water heater systems, providing energy-efficient solutions designed for reliable hot water supply. The company uses Rheem water heaters and offers emergency plumbing services alongside routine maintenance. Their team brings years of industry experience and concentrates exclusively on water heater services to ensure expertise in the latest systems and energy efficiency.

5.0

146 Reviews

Cap Hill Plumbing

1770 E Colfax Ave unit A, Denver, CO 80218

Cap Hill Plumbing is a licensed and insured plumbing service based in Denver, CO. They specialize in a wide range of plumbing services including sewer camera inspections, water heater repair and installation (both tank and tankless), drain cleaning, leak detection, sump pump repair, gas line installation, and sewer line repair. Serving Denver and the surrounding metro area, they are familiar with the unique plumbing challenges of older homes and local conditions. Their team uses camera inspections to diagnose sewer issues accurately and offers same-day repairs for many services. Cap Hill Plumbing provides upfront pricing and stands behind their work with warranties.

5.0

145 Reviews

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Understanding Tankless Water Heaters

Often called on-demand or instantaneous water heaters, these systems heat water directly as it flows through the unit, without storing it in a tank. When you turn on a hot water tap, cold water travels through a pipe into the unit, where either a gas burner or an electric element heats it instantly. This process delivers a continuous supply of hot water, making it an excellent solution for larger households or those tired of running out of hot water mid-shower.

The primary advantage is energy efficiency. Because there's no tank to constantly reheat, Energy.gov estimates that homes using 41 gallons or less of hot water daily can see 24%-34% higher efficiency with tankless models¹. For homes using more, the efficiency gain is still 8%-14%. Beyond savings, these units are compact, wall-mounted appliances that free up significant space-often up to 16 square feet-in your basement or utility closet¹.

Key Considerations for Aurora Homeowners

Before switching to an on-demand system, several local and home-specific factors must be evaluated to ensure a successful installation and long-term performance.

Gas Line and Fuel Requirements

Most high-output tankless water heaters in Aurora are gas-fired (natural gas or propane). A critical requirement is an adequate gas supply. A standard tank-style heater may use a 40,000 BTU gas line, but a tankless unit often requires 150,000-199,000 BTUs to heat water instantly¹. This typically necessitates upgrading your home's gas line to a 3/4-inch diameter pipe. This upgrade, if needed, is a significant part of the installation cost and complexity, ranging from $500 to $1,200².

Venting and Exhaust

Proper venting is non-negotiable for safety and efficiency. Indoor gas units must be vented directly to the outdoors to expel combustion gases. The venting material is specialized (often stainless steel) and the installation must comply with Aurora's mechanical codes³. Venting can be configured horizontally through an exterior wall or vertically through the roof. The complexity of this run impacts the installation time and cost, typically adding $300 to $800 to the project².

Electrical Needs

While gas is the heat source, all tankless water heaters require electricity to power their control panels, ignition systems, and sensors. A standard 120-volt, grounded electrical outlet is usually required near the installation site¹. For electric tankless models, which are less common for whole-home use in Aurora, a substantial electrical panel upgrade is almost always necessary due to their high amperage demands.

Aurora's Hard Water Challenge

Aurora's water is considered hard, meaning it has a high mineral content (primarily calcium and magnesium)¹. These minerals can rapidly accumulate inside the heat exchanger of a tankless unit, reducing efficiency, restricting flow, and leading to premature failure. To combat this, professionals highly recommend installing or using an existing whole-house water softener. This is not just a suggestion-it's often a requirement to maintain the manufacturer's warranty.

Installation Process and Local Permits

Installing a tankless system is not a typical DIY project. It involves plumbing, gas, electrical, and venting work that must meet strict local codes for safety.

The Permit Process in Aurora

The City of Aurora requires permits for plumbing, mechanical (gas/venting), and electrical work associated with water heater installations⁴. These permits are not usually eligible for "express" processing, so planning for this administrative step is important. Your licensed contractor will typically pull these permits, and the work will be subject to inspection by the city to ensure it meets all safety standards. Permit and inspection fees generally add $100 to $300 to the total project cost⁵.

Installation Timeline

The duration of the installation varies greatly based on the project's scope:

• Simple Replacement (Tankless for Tankless): If replacing an existing on-demand unit with a new one in the same location with compatible connections, the job can be completed in 2-3 hours⁶.
• Full Conversion (Tank to Tankless): Converting from a traditional tank-style heater to a tankless system is more involved. This includes running new gas and vent lines, and potentially relocating the unit. This process can take a full day, typically 4-8 hours¹.
• Complex Installations: Jobs requiring extensive gas line runs, new venting routes through finished spaces, or electrical upgrades can take longer.

Cost Breakdown for Installation

The total cost for a tankless water heater installation in Aurora is influenced by the unit, labor, and necessary home modifications. Here's a detailed breakdown:

• Total Installation Cost: For a residential system, you can expect a total cost between $1,200 and $5,400, which includes the unit, all labor, and materials^{1 5}.
• Gas Line Upgrade: As mentioned, modifying or upgrading the gas line to meet the BTU demand costs $500 - $1,200².
• Venting/Flue System: Installing the specialized venting kit and routing it outdoors adds $300 - $800².
• Permits and Inspection: The required city permits and inspections cost $100 - $300⁵.
• Old System Disposal: Removing and responsibly disposing of your old water heater typically costs $50 - $200⁷.

The wide price range accounts for the unit's brand and capacity (e.g., a whole-home gas model vs. a smaller electric point-of-use unit), the complexity of the installation, and the extent of necessary upgrades to your home's infrastructure.

Essential Ongoing Maintenance and Repair

To protect your investment and ensure a long lifespan, regular maintenance is crucial. Neglecting it is the leading cause of premature failure, especially in areas with hard water.

Annual or Biennial Descaling

The most critical maintenance task is flushing the system to descale the heat exchanger. For Aurora homes, this should be done every 1 to 2 years⁸. The process involves circulating a descaling solution (like white vinegar or a commercial product) through the heater to dissolve mineral buildup. This specialized service takes a professional about 60 to 90 minutes to perform correctly⁹. Attempting this yourself can void the warranty and may not be fully effective.

Air Intake Filter Cleaning

Tankless units have an air intake filter that prevents dust and debris from entering the combustion chamber. This filter should be checked and cleaned regularly according to the manufacturer's instructions to ensure proper airflow and efficient operation¹⁰.

Common Repairs

Even with proper maintenance, components can wear out. Common repair issues include:

• Flame Sensor or Ignition Failure: Causing the unit not to fire up.
• Mineral Buildup: Leading to error codes, reduced hot water flow, or overheating shutdowns.
• Gas Valve or Water Flow Sensor Issues.

It is highly recommended to use a certified professional for all repairs and maintenance to avoid voiding warranties and to ensure complex internal components are handled safely¹¹. In some cases, particularly if the primary heat exchanger fails, a full system replacement may be more economical than repair⁶.

Frequently asked questions

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