I won't recommend the RCS t-stat. I bought two for a client from tips on this board. I had to wait forever to get them. After installation the HO changed one of the systems to a zoned system. I changed out one of the controllers for a zoned controller and added another stat. Again, I waited a long time to get them. During discussions with RCS I was told their outside temp sensor would be seen on the Elk M1 virtual keypad. So I ordered one. After receiving the wrong OS sensor I installed the correct sensor only to find out that it is not compatible with the Elk. So now I have to get the Elk sensor to accomplish what my customer wanted. I think there is a garage somewhere where this guy makes this stuff when it is ordered, (or when he gets around to it) and they will tell you anything to sell something. I thought I was going to like the RCS T-stat and ordered one early on for myself. At the time, I thought I should try another manuf. and since then I really wish I had. I liked the look of the RCS but I will not use them again. Wow, I have been wanting to vent that for awhile. Unless others strongly recommend the RCS I would stay away from it. Good luck, I'd like to know which one you choose.
CDC
Were you buying directly from the manufacturer? Most distributors have these items in stock and ready to ship today. RCS is an established company with a wide product offering, definitely not a garage. I think you need to find a better distribution channel. May I recommend automated outlet, worthington or setnetpro. Give them a call and I'm sure they will help you out.
Another tip, when buying for a customer, always call around to check stock status. Usually your expertise and hardware mark-ups are a big portion of the bid price so it is better to get everything quickly than to save a few dollars on hardware. Helps customer satisfaction and helps you optimize your time.
I'd like to draw a line in between as a long-time RCS user that has also been lied to by Michael & Bruce (Owner, Tech Support Manager of RCS) but still like their products over the others.
In May 2000 I purchase direct from them a pre-Version 1 TR36, ZC6R and 2x TS36. These were not in distribution channels yet but I was dealing with a 30yr old house that had a very bad split design and needed absolute control over some aspects to survive the 2nd summer in this house. (I have since redone both systems and the return air issues that created the problem).
I purchased them AT RETAIL with the understanding that (1) I would provide feedback and (2) they would provide me with the updates to the features that were ADVERTISED but not available yet on the pre-release firmware. I provided feedback every 3-4 months for the first year or two then kept in contact to see when final updates would be available so I could "tune" the control units and fix RCSLink1 comm problems where it "stopped" talking to the tstats.
They finally informed me in late 2004/2005 that they had to redesign the hardware because they couldn't make it all work in the current hardware platform. New hardware, RCS Link2 and more features were promised. (Yes, 5 years)
As time went on they stopped returning emails and finally told me after I asked repeatedly then offered to purchase the new hardware (with a trade in) at a significantly reduced cost - they wouldn't do a trade-in and I should just go purchase all new gear from a distributor.
I still like RCS best over the others (I looked hard at AprilAire when it was Enerzone), it helped me get through a couple summers but I kept up my part, feedback I sent appears to be in the final product but the product I have doesn't meet what they advertised, Michael has effectively told me to "punt" regarding agreements they made prior to my purchase and I have a hard time spending $800 to replace the zone controller, single and 3 tstats even though they don't work directly with Elk (or others) today because of protocol changes. While Bruce isn't completely in the clear, the last few lack-of-responses he has deferred to Michael because he had to make the final call.
I can't say "Don't buy RCS", but if it remotely doesn't work as expected don't expect anything from the company. Return the product.