Confirm gas or electric before discussing Rheem tankless
Rheem lists gas and electric tankless equipment. Gas models include condensing and non-condensing options; electric models have different utility requirements. The Rheem name does not tell you whether a compact unit serves one fixture or the whole home.
Describe the exact error or the pattern of temperature changes. A system that works at one faucet but struggles during simultaneous use needs a demand review as well as an equipment assessment. Do not remove covers or change gas or electrical components to investigate.
Before choosing a replacement
Compare the proposed model with the home’s peak flow and utility capacity. Gas systems need a model-specific installation review, while electric systems require a load and circuit assessment. A smaller cabinet does not mean a conversion involves less work than replacing a tank.
Plan service around your home.
For a Marietta home with the heater in a basement, garage or utility closet, tell the team about the location and any restricted access. Mention stairs or a narrow removal route when discussing replacement. The installation area can affect the work as well as the choice of equipment.
Compare output at the required temperature rise, simultaneous fixture use and available utility capacity. On-demand heating does not guarantee unlimited flow or immediate hot water at a distant faucet. Learn about repair, replacement and maintenance before you call.
Describe what you can see safely. Leave gas, electrical, venting and pressure-relief work to qualified professionals.