Upgrade to efficient, on-demand hot water with professional tankless water heater install services in Ottawa. Lister Plumbing installs and services electric and gas tankless water heater systems to deliver continuous hot water, lower energy use, and longer system life.
A tankless water heater heats water only when you need it, instead of storing heated water in a traditional hot water tank. This can help reduce standby energy loss, save space in your basement or utility room, and provide a reliable hot water supply for showers, sinks, appliances, and everyday household demand.
Whether you want to replace an old tank, convert an old water heater to tankless, install a tankless gas water heater, or explore electric tankless heaters, our team can inspect your plumbing, gas lines, water pipes, electrical supply, and venting requirements to recommend the right unit for your home.
Ready to switch to reliable, energy-efficient hot water? Book a Consultation with Lister Plumbing for tankless water heater install in Ottawa. Call Now.
Tankless water heater installation requires more than simply mounting a new unit on the wall. Gas, propane, electric, venting, drain, condensate trap, expansion tank, water supply, and code compliance all need to be reviewed by qualified professionals.
Call, text, or book a video pre-diagnosis. We discuss your hot water needs, current system, fuel source, location constraints, and whether gas, propane, or electric tankless is the best fit.
We complete an on-site review of water pipes, gas lines, venting, electrical supply, cold water line, hot water supply, and the old system to determine the right unit and required work.
You receive a clear written quote outlining recommended tankless systems, the install plan, installation cost, code compliance requirements, and any upgrades needed for gas supply, venting, or electrical connections.
We schedule the installation and handle permits or approvals required under local building codes when applicable. This helps ensure a compliant installation from the start.
Professional installers replace the old tank or add a new unit, connect water supply lines, gas supply or electricity, fit venting and condensate traps, install an expansion tank if needed, and follow manufacturer specifications.
We test hot water supply, temperature control, gas tightness, electrical connections, leaks, drain setup, air and venting performance, and manufacturer-specified startup procedures.
The owner or lead plumber reviews operation, maintenance tips, warranty details, and how to use your new tankless water system.
We provide post-install follow-up and recommended maintenance to help prolong life expectancy, improve efficiency, and keep your tankless heater working reliably.
Real feedback from our valued customers based on their genuine experience with Lister Plumbing.
Whether you need a new water heater, a tankless upgrade, or help replacing traditional hot water tanks, Lister Plumbing can help you plan the installation properly.
Choosing between a gas tankless water heater and an electric tankless unit depends on several factors, including your fuel source, household demand, electrical supply, available gas lines, venting options, and installation location.
A tankless gas water heater is often a strong option for homes with natural gas or propane access and higher hot water demand. Gas tankless systems can supply hot water for multiple fixtures, but they usually require proper venting, gas supply sizing, condensate management, and code-compliant installation.
Electric tankless heaters may work well for smaller homes, point-of-use applications, or situations where gas is not available. However, an electric tankless unit may require dedicated circuits, increased electrical supply, and qualified electrical work.
Our team will inspect your current setup and recommend the right tankless water heater based on your home, usage, and budget.
If you currently have an old tank or traditional hot water tank, converting to tankless may require adjustments to your plumbing, gas, venting, or electrical system. The old water heater must be removed, and the new unit must be mounted, connected, tested, and commissioned properly.
A tankless conversion may involve:
A professional installation helps protect your home, reduce risk, and ensure your system performs as expected.
The cost of tankless water heater installation depends on the unit, fuel source, location, and required upgrades. A straightforward replacement may cost less than an installation that requires new gas lines, electrical upgrades, venting changes, water pipe modifications, or permit work.
Several factors can affect the final installation cost, including:
Lister Plumbing provides a clear proposal so you understand the complete scope before work begins.
Lister Plumbing provides tankless water heater installation across:
If you are nearby and want to confirm availability for a tankless water heater installation, contact Lister Plumbing.
What is a tankless water heater and how does it differ from a traditional hot water tank?
A tankless water heater heats water on demand rather than storing it in a hot water tank. That delivers continuous hot water, saves space, and can be more energy efficient than traditional hot water tanks.
Do you install electric tankless heaters and gas tankless units?
Yes. Lister Plumbing installs both electric tankless and tankless gas water heater units, handling electrical connections or gas lines and venting requirements as needed.
How do I know the right tankless water heater unit for my home?
We size the unit based on demand, including showers and appliances, supply temperature in Ottawa, and fuel source. A site inspection helps select the right unit and ensures manufacturer specifications and code compliance.
Will installing a tankless system require new gas lines or electrical upgrades?
Possibly. Some tankless gas water heaters require upgraded gas supply and venting, while electric tankless units often need increased electrical supply and dedicated circuits. We assess and include necessary upgrades in the proposal.
Are tankless systems more energy efficient?
Yes. Tankless systems avoid standby heat loss from stored water, providing energy-efficient hot water when used properly. Energy savings depend on usage patterns and fuel source.
How long does a tankless water heater installation take?
Most installations are completed in one day for typical replacements. Larger jobs involving gas line work, electrical upgrades, or permit processing may take longer. We provide a clear timeline in your proposal.
Do you handle permits and local building codes in Ottawa?
Yes. Lister Plumbing ensures installations comply with local building codes and manufacturer specifications. We can help obtain required permits for gas and electrical work.
Can I convert my old tank to a tankless system?
Absolutely. We replace old water heaters and plan conversions, addressing water pipes, gas supply, venting, and electrical connections to create a compliant installation.
What about venting requirements and condensate traps for gas units?
Gas tankless systems have specific venting and condensate trap requirements. Our installers fit proper venting, flue connections, and condensate management per code and manufacturer guidelines.
Is an expansion tank required with a tankless system?
In some setups, an expansion tank is recommended to manage pressure from thermal expansion. We evaluate your system and include an expansion tank when needed.
How long do tankless water heaters last compared to old tanks?
Tankless systems often have a longer lifespan, commonly 15 to 20 years, depending on maintenance, water quality, and proper installation.
Do you inspect existing pipes and main lines before installation?
Yes. We can run sewer camera or main line camera inspections and inspect water pipes to identify hidden issues before installation that might affect the new unit.
What maintenance do tankless water heaters need?
Regular descaling and filter checks are recommended, especially in areas with hard water. We provide maintenance guidance and service options to keep systems running efficiently.
Are your installers qualified and insured?
Lister Plumbing is owner-operated with 14 years of trade experience. Our team follows manufacturer specifications and local codes. We provide a one-year workmanship warranty on installations.
How can I get a quote or book a consultation?
Call or text Lister Plumbing, request a video pre-diagnosis, or book a consultation online. We offer free quotes for larger jobs and no upfront deposit for most installations.
