pvi heaters
awhile ago we had 15-20 units installed,they were using low pressure steam as heating medium.We had some trap issues,and solenoid and venting issues,not sure if these things were heater related.They seemed to work pretty good once the bugs were worked out.We also had an issue with small control fuse blowing,they were located in very hot locations.overall not too bad
PVI
Anyone ever install or work on a PVI, any experience here?