As much as I would like to say I am an expert, I am not when it comes to the actual performance and settings of a residential gas furnace and air conditioning unit.  So I am hoping some would be willing to share their incite or at least some resources I could go to.

So my question is about the fan speed settings for the heating and cooling system.  Two years ago I had a new Tempstar 95AFUE two stage variable speed furnace installed.  It is my understanding that even though it is a variable speed fan that you want to adjust fan speed differently for the heating and cooling system.  I ask because the service tech was at the house today on an A/C tune up & when my wife inquired about the fan speed, she was told it was on the factory settings.

So is this true, with variable speed motors you don't have to worry about the fan speed, or should there have been some kind of adjustments at time of the original install?  And for future service calls by potentially another company, what kind of testing should I ask for to be done to see if the CFM moving through the system are appropriate for the season.

Thanks in advance!

Josh

Views: 14255

Reply to This

Replies to This Discussion

Sounds like to me that you have a system installed and it has never been setup properly. Have a Service Tech come by and set it up for you.

A quick static pressure test would help you determine if you're getting the flow you need over the coil.   You should be able to reference your manufacturer's documentation for the TESP.   If it's too high, then it would be time to call in for a clean and tune as well as test and balance.   

Just my $0.02.

this is what I do for 25 yr.  I find most res unit are mid .8" water Col.   The tag on side of air mover says .5 or .4

you can look at SP or feet per min or temp, you get the same model.  This is big,  very big

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Kim Tanner posted videos
5 hours ago
Positive Energy posted videos
10 hours ago
Profile IconErnesto , Positive Energy, Cristy Kraus and 3 more joined Home Energy Pros
11 hours ago
Hal Skinner replied to Hal Skinner's discussion 'YGRENE' super fund for energy upgrade financing
"Thanks Susan.  It is appreciated."
yesterday
Adin Maynard commented on Corbett Lunsford's video
Thumbnail

Beyond Blower Doors: Zonal Pressure Testing

"Great video. Your approach of simplifying the reading as X/50 = percent leaking to outside (with…"
yesterday
Chris Dorsi posted an event
Thumbnail

2015 Habitat X Summer National Conference at Big Sky Resort

July 21, 2015 to July 23, 2015
The 2015 Habitat X Summer National Conference will take place at Big Sky Resort, just down the road…See More
yesterday
Royce Gleason posted a status
"The passion to learn and gain more advanced energy efficiency techniques, news, videos and much more from home energy pros across the globe."
yesterday
Susan Davison replied to Hal Skinner's discussion 'YGRENE' super fund for energy upgrade financing
"Hal,   With the above questions, let me first state 'let the buyer beware'. All of…"
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service