Tankless water heaters can save space and provide hot water on demand, but installation requires careful planning.

Gas tankless models need appropriate gas supply, water connections, electrical power, and exhaust venting. Depending on the technology, condensate management may also be required.

Condensing units recover heat from exhaust and generally operate at higher efficiency. Their cooler exhaust can allow approved venting materials such as plastic-based systems, depending on the model and local requirements.

Non-condensing units produce hotter exhaust and typically require high-temperature metal venting.

This difference is particularly important when replacing an existing water heater. The previous venting system may not be suitable for the new unit.

Proper sizing is also essential. The system should be capable of handling the expected simultaneous hot-water demand.

Before installation, homeowners should evaluate:

• Water demand

• Gas capacity

• Venting route

• Condensate drainage

• Installation location

• Local codes

• Manufacturer requirements

For a detailed technology comparison, visit this tankless water heater installation guide: https://toptechmech.com/condensing-vs-non-condensing-tankless-water-heater/

Professional installation is strongly recommended for gas-fired equipment.