Tankless water heaters in Markham are a game-changer—hot water is on demand, there is no big bulky tank, and energy bills are lower. But what if your system isn’t working as it should? Many homeowners make mistakes that lead to cold showers, higher costs, and even system failure.

Here are the 5 most common mistakes and how to avoid them.

1. Choosing the Wrong Size

Think of your water heater as a highway. If too many cars (hot water demands) enter at once, there’s a traffic jam—meaning cold water when you least expect it. A small tankless unit won’t keep up with a large household, leading to inconsistent water temperature.

Solution? Get the right size. HVAC contractors in Markham, like Air Leaders, can assess your needs and recommend a unit that handles your home’s demand.

2. Ignoring Maintenance

A tankless system isn’t "set it and forget it." Minerals in water build up inside, clogging the heat exchanger. Over time, this reduces efficiency and can shorten the system’s life.

Just like a car needs oil changes, your unit needs descaling. Experts suggest professional servicing once a year. A gas furnace service in Markham can often check your water heater during routine maintenance.

3. Poor Installation

DIY installation might save money upfront, but a single mistake can cost you later. Incorrect gas line sizing, improper venting, or bad wiring can cause breakdowns—or worse, safety hazards.

Licensed HVAC contractors in Markham know the exact installation requirements. They ensure proper gas connections, ventilation, and water flow, giving you peace of mind.

4. Setting the Temperature Too High

Cranking up the heat feels tempting, but it can cause scaling inside the unit, making it work harder. Plus, it raises energy costs and increases the risk of burns.

The ideal setting? Around 120°F. It’s hot enough for showers and dishes but not so high that it damages the system. Air Leaders can adjust it for you during service visits.

5. Ignoring Water Quality

Hard water is a silent killer for tankless systems. Minerals build up, reducing efficiency and causing damage. If your area has hard water, you’ll need a water softener to prevent scaling.

A quick test? Check your faucets and showerheads—white buildup means hard water. Pairing your tankless heater with a softener extends its lifespan and keeps it running smoothly.

Conclusion

A tankless water heater in Markham is an investment in comfort and efficiency—but only if used correctly. Choosing the right size, keeping up with maintenance, ensuring proper installation, setting the right temperature, and managing water quality are key to avoiding costly mistakes.

Need expert help? Air Leaders specializes in installation, maintenance, and repairs, ensuring your system runs flawlessly. Contact them today to keep your hot water flowing without surprises.