Re: [mh] Upgraded to Omnistat2 RC-2000 dual zone system

The irony was that the new fancy heat pump system actually provided an
HVAC interface compatible with ancient thermstats (taking regular
heat/cool/fan commands and not fan and reverse), so I could have kept my
RC-80 and RC-90 to run this, but I already had the new Omnistats2 that
hard arrived, so I kept them.
Ultimately they are more pretty but it's mostly the same end result
otherwise.

If anyone is interested in buying my RC80/RC90 as backups/spares or
maybe for a new zone you wanted to setup, before I put them on Ebay, let
me know.

Marc

On Fri, Jun 12, 2026 at 10:51:12AM -0700, Marc MERLIN wrote:
> After my years, my furnace died, upgraded to a heat pump and from
> RC-80/RC-90 to RC-1000/RC-2000.
> Also learned to debug a non working system :)
> 
> Writeup here:
> https://marc.merlins.org/perso/linuxha/post_2025-06-11_Upgraded-Broken-Furnace-to-Heat-Pump-System_-Upgraded-Misterhouse-Compatible-Thermostats-from-HAI-RC-80-RC-90-to-Omnistat2-RC-1000-RC-2000_-and-Debugged-Bad-Signalling-to-Honeywell-Home-HZ322-Zone-Board.html
> 
> Marc
> -- 
> "A mouse is a device used to point at the xterm you want to type in" - A.S.R.
>  
> Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08
> 
> 
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-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08


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