Greetings everyone!

    I have a technical questions I hope I could get some feedback! I understood that air source heat pumps are very efficient because of their ductless configuration. I have been told by a very smart person that adding a duct to a airsource heat pump (Daikin has now a unit that comes with duct) does not diminish with any great significance the efficiency of the unit.  

   I of course have my reasons to believe that using ducts is increasing the liability to the system, but I like to refrain my reasons so I do not "influence" your thoughts...   

   Your thoughts?, which systems would you prefer? There are two working situations for this conversation, one is a 60 x 40 open floor, one room building (no kitchen, and no bathroom -just a working space); the other one is a 3 bedroom system home about 2500sq (both units are going to be air sealed and properly insulated. 

   Thank you everyone! 

Luis

Tags: air, duct, ductless, efficiency, heat, minisplits, pump, source

Views: 228

Reply to This

Replies to This Discussion

Equipment is rated for it's configuration (ducted or ductless). So you can compare equipment efficiencies directly. However, a ductless system has no distribution losses. A ducted system would have losses if the ducts are in unconditioned space. A ducted system will also have higher fan energy.

Now does a ducted minisplit has the same efficiency as a ductless? Yes & No. If it's a single indoor head & single outdoor condenser, Yes. But if it's a multi indoor head set up with 1 outdoor unit, there is usually an efficiency drop (rated).

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
10 hours ago
Positive Energy posted videos
14 hours ago
Profile IconErnesto , Positive Energy, Cristy Kraus and 3 more joined Home Energy Pros
15 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