The finer points of thermostats are actually much more complicated than any published article covers. You must study each premium thermostat individually. If it does not have settings for swing, deadband, fan delays, early recovery, proper setbacks, etc., it's not really of good use. Dual fuel setups are even more complicated because you must decide whether to use the thermostat or the fossil fuel controller function for balance point control. You must also decide on an economic or thermal balance point.  
  
If you actually live in the house, you may adjust a dual fuel setup to your preferred balance point. If you are an installer, you may be tempted to guess at a balance point, the same as guessing at the sizing of the HVAC units. If you are a designer, you will have your own methods for sizing and setup, with lots of room for discussion, and possibly,  imprecision. A homeowner without degrees in physics, chemistry, and business is at a total loss to understand their home climate system today!  
  
Manual thermostat control always results in the lowest costs and optimum comfort. No thermostat out there can compete with a trained human! The Nest thermostat has serious flaws, as does its competitor, the Honeywell Prestige thermostat. The ideal thermostat for all setups has yet to be produced or exist.   
  

Views: 376

Tags: dual, fuel, honeywell, nest, thermal, thermostat

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by Tom DelConte on February 28, 2012 at 8:19am

Also: Cable giant Comcast plans to offer a smart thermostat: http://gigaom.com/cleantech/comcast-to-offer-smart-thermostat-servi...

Comment by Tom DelConte on February 27, 2012 at 10:27am

Opower is an important development is temperature and power control, but your electric co. must cooperate: http://www.greentechmedia.com/articles/read/Opower-Channels-Home-Ef... . 

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Sean Lintow Sr replied to Larry Nissman's discussion Foam insulation on attic floor
"The insulation job is quite simply a freaking eyesore & mess - with that it shouldn't be…"
2 hours ago
Sean Lintow Sr replied to Melissa Baldridge's discussion IECC 2012 & 2015 Compliance & HRVs
"commercial is 67% efficiency & 2.8 cfm per watt for residential as I recall on 2015 which…"
2 hours ago
Simon added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Advice needed please

I'm looking to build my own blower unit for use with the minneapolis system.Please could anyone…See More
5 hours ago
Simon joined Kim Tanner's group
Thumbnail

TEC

Discussion group for The Energy ConservatoryHave a question about residential or big building air…See More
6 hours ago
Rob Madden, Solar Home Broker replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"With a Foobot, are you able to recalibrate the sensors?  While I like the price and the…"
18 hours ago
Steve Mann replied to Steve Mann's discussion Eliminator EF400 Smoke Machine in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Yes it is. Steve"
21 hours ago
Laurie DiDonato updated an event
Thumbnail

Become a HERS Rater with the NE HERS Alliance this fall! at Classroom Component at Energize Connecticut Center

September 19, 2016 at 9am to October 21, 2016 at 5pm
Online Component: September 19th-30th - Weekdays 9am-12pm5-Day Classroom/Field Training:October…See More
23 hours ago
Melissa Baldridge posted a discussion

IECC 2012 & 2015 Compliance & HRVs

 I’m failing IECC 2012 with the HRVs we’ve been using – Honeywell .  (See specs below that I…See More
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service