(1) They work great. (2) If you're doing photo printing you might want to stick with OEM stuff. (3) About 1 in 10 of these generic cartridges are defective, bad chip, but the price still makes it worthwhile. (4) Don't let your Epson do a firmware update, its not for security, it's to make sure you don't use generic ink.
Honeywell VisionPRO TH9421C1004 Thermostat - White THM5421C Interface Module C1
Jul 11, 2022
Only compatible with the VisionPRO IAQ systems (discontinued)
This was discontinued in 2014, with no support and no replacement parts offered by Honeywell.
The "TH9421C1004" isn't really a thermostat - it's more of a display and control panel. It has 3 wires (pins) that do not conform to any other thermostat. The typical thermostat wires (W, Y, G, C, etc) connect to the master control box. In our setup, the master control box is mounted to the side of the furnace itself, but it could be installed anywhere. So if you're installing this for the first time, or if you're replacing this with something else, new wiring may be required.
This wasn't a big hit for Honeywell. This one unit can control multiple different HVAC units, heat pumps, humidifiers, and dehumidifiers. They were expensive when they came out. If you have this in your home, it's probably overkill. It's not wi-fi enabled.
This system came out around 2006, ours was installed around 2010 and failed in 2022. They say that thermostats only last about 10 years, but in my book this is unacceptable, a pretty short lived thermostat. It also seems pretty crappy of honeywell to sell something like an HVAC component - that people invest a lot of money in, and expect to last for decades - and not just discontinue it, but to stop support and stop selling parts/components.
It is NOT plug and play. You need to program it - for example, what temp or humidity level to click on or off the humidifier, etc etc. There are hundreds of potential settings, and several physical dip switches on the system. There are several manuals available online with a simple search, including archives on the honeywell site. An experienced DIY'er could figure it out, but expect a few hours of research first.
I liked it well enough while it lasted, the interface was easy to use. But mine only lasted 12 years, so I question the wisdom of buying a used unit at all (since they're all about the same age), especially given the programming and install headaches. I'm just a DIY'er, not a professional, but to me this system is convoluted for residential use, didn't last long enough to justify the expense and setup, and to be avoided.