Honeywell RTH6400D 5-1-1-Day Programmable Thermostat
by Honeywell
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Product Details
Manufacturer: HoneywellModel: RTH6400D
Color: White
Product features:
- Large backlit display with soft-touch button interface
- Precise temperature control of plus-or-minus-degrees Fahrenheit with auto change from heat to cool
- Exclusive Honeywell Smart Response Technology and filter change reminder
- Compatible with heating and cooling system plus single stage heat pump systems
Description of Honeywell RTH6400D 5-1-1-Day Programmable Thermostat
Maximize comfort, reduce household energy use, and save money with the RTH6400D 5-1-1 Programmable Thermostat from Honeywell. Featuring a user-friendly design that lets you program weekdays, Saturdays, and Sundays separately, this thermostat makes it easy to sync your home's heating and cooling system with your schedule.
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You know that turning down your heat at night saves you money, but you hate waking up and making breakfast in a freezing cold kitchen. Or you don't want to run your AC all day while you're at work, but you want your home to be cool and comfortable when you get home. That's where a programmable thermostat makes all the difference.
 The customized settings add luxury to your home while affording you valuable savings on your energy bill. View larger. |
 Every day is unique. With this thermsostat, enjoy the freedom of pre-programming to fit your different daily needs. View larger. |
An Easy Way to Save Energy and Money
If programmed as directed, this thermostat also offers you the ability to save up to 33-percent on annual heating and cooling costs (savings may depend on the geographic region you live in and your energy usage). When it does come time to change the thermostat's battery, an easy-access compartment makes battery replacement fast and painless.
Exclusive Technology for Reliability and Ease of Use
Programming and monitoring the thermostat is simple with a soft-touch button interface and an easy-to-read display that shows the current room temperature and the set temperature simultaneously. This display is backlit, making it easy to see even in dimly lit rooms and hallways. All readouts are rendered in natural language instead of confusing symbols, and you can select whether you would like temperature readouts to appear in Fahrenheit or Celsius.
The thermostat features Honeywell Smart Response Technology and a feature that enables Auto Changes from Heating to Cooling, which continually adjusting the pre-heating or cooling of your home for effective results and precise comfort control within one-degree F of your desired temperature. The thermostat offers temporary and permanent hold settings for greater convenience.
Broad Compatibility for Use with Your Existing System
This thermostat is compatible with a broad range of 24-volt heating and air conditioning systems, including single-stage heating and cooling, heat pump systems without auxiliary (back-up) heat, gas fireplaces, and heating only or cooling only systems. It is not compatible with multi-stage heating and cooling, heat pump systems with auxiliary (back-up) heat, and electric baseboard heat (120-240 volts).
About Honeywell
With over 120 years of trusted reliability, Honeywell International is a diversified technology and manufacturing leader, serving customers worldwide with aerospace products and services; control technologies for buildings, homes and industry; automotive products; turbochargers; and specialty materials.
Whether you're flying on a plane, driving a car, heating or cooling a home, furnishing an apartment, taking medication or playing a sport, Honeywell products touch most peoples' lives everyday. Honeywell technologies are found in more than 150 million homes, 10 million buildings and a multitude of manufacturing plants around the world.
What's in the Box
RTH6400D 5-1-1 Programmable Thermostat, wire labels, wall anchors, mounting hardware, and an installation and user guide
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Tools and Hardware Reviews of Honeywell RTH6400D 5-1-1-Day Programmable Thermostat
Customer Review: Great Product!
Summary: 5 Stars
I installed this thermostat about six months ago and it works well. I found the installation straightforward and programming sequence intuitive. I especially like the large, well-lit display and the large programming buttons, none of which are hidden behind a panel which must be lifted for access. I also like that heating/cooling periods can be "skipped" so you can program two periods per day (wake/sleep) instead of having to program all four periods (wake/leave/return/sleep). The thermostat has both temporary temperature override (only affects current period) and vacation hold (maintains temperature setting until manually canceled). The unit is well designed and visually appealing.
When reading previous reviews, I had some concerns that almost caused me to not order the product. Luckily, I found that none of these issues presented a problem for me. Here are some of the problems discussed in previous reviews, followed by my answers:
1) Issue: There is no dedicated backlight button and it is not possible to activate the backlight without pressing a button which will then alter thermostat programming. Answer: I found this *not* to be true, and just pressing the temperature up or down button once causes the backlight to come on without changing the temperature set point (just press the button more than once to change the set point). Surprisingly, I didn't see this feature mentioned in any of the product literature.
2) Issue: When setting the unit to "cool", the compressor will *never* come on until the compressor protection interval has expired (five minutes). Answer: I found this to be true only if the compressor has been on within the previous five minutes, so the AC will come on immediately as long as you didn't just turn it off (which is what I would expect).
3) Issue: There is no cycle or "swing" adjustment on the current Honeywell digital thermostats. They are set for a "swing" of plus or minus one degree. Answer: This is true, and there is no direct way to set the swing so you can reduce the amount of cycling of heating/cooling. That said, there is a "heating cycle rate" setting for different types of heating systems (Function 5 in System Setup). This is set to "gas or oil furnace less than 90% efficient" by default, and needs to be changed for electric, hot water, high-efficiency, steam or gravity heating systems. I believe many people will need to change this setting to match their heating system type. Also, if you find that your heating system continues to cycle too often when the thermostat is set to the correct heating system type, you may be able to reduce cycling by choosing a different setting (but only do so at your own risk).
Hope this helps.
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