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: 204

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

Sean Lintow Sr replied to Kevin Jordan's discussion air infiltration total
"Sorry I don't have anything handy but pull a search for EqLA equivalent leakage…"
11 hours ago
Erik Henson commented on Andrew Navolio's blog post MEEA assists with Home Energy Certification programs
"It seems to me like we are trying to re-invent the wheel.  There are several available…"
yesterday
Egr renovations posted a status
yesterday
Hal Skinner replied to Hal Skinner's discussion What this RCC will do on an exterior wall compared to standard paint. in the group The RCC Classroom (Radiant Control Coatings)
"Craig, It was a test on a refrigerated commercial building.  We used to take temperarure…"
yesterday
Craig Bird replied to Hal Skinner's discussion What this RCC will do on an exterior wall compared to standard paint. in the group The RCC Classroom (Radiant Control Coatings)
"Actually emissivity rating doesn't make much of a difference between coatings because almost…"
yesterday
Tom White posted videos
yesterday
BMI - Tami Svarfvar's 2 videos were featured
yesterday
Hal Skinner replied to Hal Skinner's discussion What this RCC will do on an exterior wall compared to standard paint. in the group The RCC Classroom (Radiant Control Coatings)
"Craig, here is a list of an index of reflectivity of different colors.  I did not see any…"
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service