Is there a propane kit for this nexus unit heater? What is the efficiency on propane if there is a kit?

We do not carry a propane conversion kit for this heater, but we do carry this model in a propane configuration: HU200A1PS111. The efficiency is the same as its natural gas version at 95+% (up to 99% at full turndown).

If you have any further questions, please call us and we will be happy to assist you.