Vent free appliances more than one million units shipped annually do not require a vent flue or chimney model code ansi z21 11 2 range of 2 000 40 000 btu limited to 40 000 btu usa vent free products log sets worldwide vent free products.
Vent free tankless water heater.
4 0 out of 5 stars 14.
Excel pro tankless gas water heater natural gas 6 6 gpm whole house and for hydronic heating compare to rinnai rheem noritz bosch free flue kit 3 6 out of 5 stars 48 555 00 555.
Ez deluxe tankless water heater 3 4 gpm natural gas ng indoor whole home free direct vent exhaust included.
Ods oxygen detection safety pilot.
Starts up with only 2 psi.
Other similar size heaters require a costly flue installation.
Rheem rtg 84dvp low nox direct vent tankless water heater liquid propane energy star 8 4 gpm.
No expensive flue required.
All other tankless gas water heaters require at least 20 psi to start up due to their outdated technology.
Noritz nrc66dvlp indoor.
Holds up to 150 psi.
Logsets water heaters space heaters safety.
All other tankless gas water heaters rely on outdated rubber diaphragm technology to start the units and need pressures higher than 20 psi to operate.