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HVAC Product Type
Zone Controllers
Thermostat Control
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Advanced (Installs > 60 minutes)
Residential Control Systems
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Allows Up to 4 Standard Electronic Thermostats to Independently Control the Temperature 4 Zones
HVAC 4-Zone Controller
Residential Control 001-00250 ZC4 4-Zone HVAC Controller with Thermal Equalizer
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Typical Zoned HVAC System Diagram
Residential Control 001-00250 ZC4 4-Zone HVAC Controller with Thermal Equalizer
Item# 3038C
Price: Normally $229.99 
Hot Deal $179.82
Free shipping on orders over $175 - See Details


  • Set different temperatures in different areas for comfort and energy savings
  • Thermal equalizer prevents overheating of top floor of 2-story homes
  • Works with standard thermostats, any heating system, and with X10 or RS232/485 thermostats

Essential Info

In most homes, heating and cooling account for a large part of the energy bill, despite this, most homes waste a tremendous amount of heat and cool air through inefficient use. Efficiency can be significantly improved by heating or cooling only when occupants are present and by heating/cooling to the exact desired temperature. Home automation and zoned HVAC (heating, ventilation, air-conditioning) can do this for you automatically. You can set different desired temperatures in each room, and by using motion detectors, you can automatically turn ON/OFF the heating/cooling to each zone as people enter and leave. The energy savings in the average home over just a few years will often pay for the entire home automation system. The 24V AC 40VA Power Supply w/Auto-Resetting Fuse is required and sold separately.


What's Included

  • 1x - Zone Controller
  • 1x - Installation Instructions
  • More Info

    How it Works - Convert a standard heating and cooling system into a system that provides independent temperature control of four zones within a home. Simply install a thermostat in each zone and then wire them to the HVAC 4-Zone Controller. Install dampers in the ducts feeding the different zones and wire those back to the zone controller. Finally, connect the zone controller to your heating/cooling system. The zone controller will automatically coordinate damper and HVAC system control to maintain the temperatures set in each zone. The HVAC 4-Zone Controller includes a thermal equalizer feature that's ideal for two-story homes. It uses timed recirculating cycles during lower floor heat calls to prevent excessive heat build-up in upper floors. This also helps save energy by recycling heat back to the lower floor.

    How This System Saves You Money - A simple common-sense analysis of unzoned systems will show you how much you can save. Imagine a two-zone home with the living room as one zone and the bedroom the other zone. An unzoned system always heats/cools both rooms simultaneously even if only one zone is occupied. This means that twice as much energy is being used as necessary. Add to that any periods when the system is accidentally left on when no one is home, and you can see how wasteful this system can be. An automated zoned system will only heat/cool the room that is being occupied. The occupied room will also be heated or cooled to the desired temperature much faster. This is because the energy that would otherwise be wasted on the unoccupied room is being directed to the occupied room.

    HVAC and Home Automation System Compatibility - This controller will work with most standard electronic thermostats and gas/electric heating systems and A/C systems. Uses 24VAC normally open dampers, automatic heat/cool changeover, built-in short cycle protection for A/C compressor. Combine with any X10 or RS232/485 thermostats for additional zone control through your intelligent controller.



    Manufacturer:Residential Control Systems
    Manufacturer Product No.:001-00250 ZC4
    Shipping Dimensions:9" x 7" x 2"
    Power:24V AC


    Typical Zoned HVAC System Diagram       
    Typical Zoned HVAC System Diagram       


    6 Ratings
    5 star: 83%  (5)
    4 star: 17%  (1)
    3 star: 0%  (0)
    2 star: 0%  (0)
    1 star: 0%  (0)
    Average Customer Rating
    (6 customer ratings)
    Share your thoughts with other customers
    RON -- lithia springs, GA   1/3/2014
    Working great and was very simple to install.
    Jacob -- Denver   4/16/2012
    Nice device and works well. One complaint: It uses a size 2AG fuse, which are impossible to find at retail stores, and can only be got mail-order. Getting it mail order means that you'll be without HVAC for a week, and will be paying ten times more for shipping than for the fuse. I ended up soldering in a fuse holder bought at Radio Shack for an easily available 5mm x 20mm fuse.
    Ron -- Virginia Beach   1/26/2010
    Works just as I hoped! No more cold rooms or hot rooms! Much cheaper than any other alternative and it does it all by itself! I even installed it myself :
    RICHARD -- hertford, NC   2/19/2009
    This controller replaced our original system which had a bad design. I am very pleased with the outcome. It was a direct replacement, no problem with installation or operating instructions.
    WILLIAM -- baltimore, MD   3/26/2007
    I love it. Works great. It should help me on my heating and cooling bills
    D. L. -- burbank, CA   6/23/2006
    outstanding - very pleased with tyhis controller.
    RANDY -- frisco, TX   3/28/2006
    Great product and RCS has an excellent customer support system as well if you need to contact them
    JOHN -- las vegas, NV   4/7/2005
    Excellent Product. Performs flawlessly
    RANDALL W. -- auburn, CA   1/14/2004
    Easy to install and configure. Keeps the house much more comfortible.
    BOB -- anaheim, CA   10/28/2003


    HVAC 2-Zone Controller  24VAC 40VA Power Supply w/ Auto-Resetting Fuse  RS-485 Thermostat   
    HVAC 2-Zone Controller  24VAC 40VA Power Supply w/ Auto-Resetting Fuse  RS-485 Thermostat   

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