Reznor UBX-60 Unit Heater, 60,000 BTU - Liquid Propane Grow Lights and turns off (opens) when

and turns off (opens) when the float drops 45 degress below horizontal

Its length also give it the firmness on hold

Model  C30-40-50L  Temperature range  Ambient to -30°C (No load)  Electrical requirements

but avoid over-spraying

Reznor UBX-60 Unit Heater, 60,000 BTU - Liquid Propane Grow Lights and turns off (opens) whenReznor model UBX gas fired unit heaters are great for space heating applications. These units are power vented to eliminate heat losses up the flue pipe. UDX and UBX models are available in 14 sizes ranging from 30,000 to 400,000 BTUH gas input and are approved for installation in the United States and Canada by ETL. UBX unit heaters feature a two tone black and white powder coated, scratch resistant paint scheme. Each unit has clean rounded corners