Vaporstat Controller (Steam), 0 to 16 oz/in2

When it comes to residential steam systems, operating at lower pressures is a must. The Vaporstat can't physically go above 16 ounces of pressure, making it 100% knucklehead-proof. Lower pressure reduces fuel consumption, allows the boiler to remain off for longer periods of time, and can often eliminate minor noise issues in a system. If you have a two-pipe steam system, then the Vaporstat is a necessity. Most older vapor systems require a maximum operating limit of 3-5 ounces. The only complaint with these controls is their sensitivity. They often cause problems down at the lower end of the scale, and may not be 100% accurate. However, they do have great repeatability. After installing 100's of them over the last few years, we have yet to service or replace one due to defect or wear-and-tear. If you're going to install this Vaporstat, do yourself a huge favor and install a low pressure steam gauge as well. Find one that has a range of 0-32 ounces. You'll really be able to finely monitor and diagnose your steam system with this setup. You'll also want to make sure that your main vents are adequately upgraded to vent air from the system as quickly as possible, in order to allow the pressure to build evenly in the system. Don't even think about installing a Vaporstat if your main venting is sub-par or nonexistent. You'll cause short-cycling and uneven heat. Steam acts as a unified system, and one control is neither the end answer or only factor in efficient operation. But, used appropriately, the Vaporstat can add greater control, and reduce energy usage.

This unit arrived new but was DOA, it would not cut-out even at pressures far exceeding the 16oz max setting. Honeywell support is non-existent for these products, spent about 90m on phone trees with them but ultimately they couldn't connect me to anyone familiar with their pressure controls. Supply house is sending out a replacement unit so hopefully that one has better quality control than the first.