Tankless Water Heater Service | Oakland & Macomb County

The short answer

Start with the complete system and the evidence

A tankless water heater needs enough output for the fixtures used together and the temperature of the incoming water. Sandison plans and services the complete installation, including fuel supply, venting, water quality, recirculation, and access for maintenance.

What Sandison evaluates

A practical path from symptoms to the right scope

Clear diagnostic process
Licensed multi-trade coordination
Repair and replacement options
Residential and commercial support

Tankless system design

A tankless unit must match demand, fuel, venting, water, and service access

Tankless performance is not determined by the model number alone. Sandison reviews simultaneous hot-water demand, incoming-water temperature, available gas or electrical capacity, vent length and termination, condensate disposal, recirculation strategy, water hardness, isolation valves, and the room available for future service. Those details decide whether a tankless system can deliver stable temperature and practical maintenance without creating a new restriction elsewhere in the property.

Noritz field experience

Diagnosis separates scale, flow, combustion, controls, and installation conditions

As a Noritz Platinum Dealer, Sandison works from operating symptoms and installation evidence before recommending parts or replacement. Flow sensors, inlet screens, error history, combustion air, exhaust routing, gas delivery, water-side scale, heat-exchanger condition, and control settings can produce similar customer complaints for different reasons. Maintenance is documented around the installed equipment and water conditions; a cleaning procedure is not presented as a cure for a failed component or an incorrect installation.

Primary references

Verify the local and credential information.

U.S. Department of Energy — selecting a new water heater

Common questions

What property owners ask

How do you size a tankless heater for several showers?

Sizing considers the fixtures likely to run together, their flow demand, and the temperature rise needed from the incoming water. The selected equipment also needs compatible fuel or electrical capacity and an appropriate venting arrangement.

How often should my tankless heater be descaled?

The maintenance plan should follow the installed model's instructions and account for water hardness, use, and service history. Descaling addresses mineral buildup; recurring temperature or ignition problems may need additional diagnosis.

Can tankless equipment use my existing gas line and vent?

That depends on the selected model and the installed piping and vent route. Sandison reviews gas delivery, vent length and termination, condensate disposal, water connections, and service access before determining what can be reused.

Evidence and review

Why this page can be trusted

Service information based on Sandison’s documented trade scope and the technical references below. Contact the office to discuss the conditions at your property.

Technical lead: James Sandison, B.S. Mechanical Engineering, Oakland University. Michigan Mechanical License 7115733 · Michigan Master Plumber 8112263 · Michigan Plumbing Contractor 800-3618. Service information record: 2026-08-28.