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: 207

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

Hal Skinner replied to Tony Rigdon's discussion Placement of 5/8" firewall, over or under foam board insulation?
"I am curious now.  They require a penetration firewall in the wall system but do not require a…"
4 minutes ago
Mike Kandel posted discussions
14 minutes ago
Mike Kandel added 2 discussions to the group Building Performance Institute (BPI)
15 minutes ago
Hal Skinner replied to Tony Rigdon's discussion Placement of 5/8" firewall, over or under foam board insulation?
"WOW.  30 years working and m,eeting with every kind of contractor and never heard of this…"
1 hour ago
Tony Rigdon replied to Tony Rigdon's discussion Placement of 5/8" firewall, over or under foam board insulation?
"The building inspector when he inspected my footing told me about the drywall on the outside being…"
3 hours ago
Profile IconSuskin Lockett Jr, Yoomie Ahn, Lindy Wordlaw and 6 more joined Home Energy Pros
3 hours ago
Tony Rigdon replied to Tony Rigdon's discussion Placement of 5/8" firewall, over or under foam board insulation?
"Bud, I'm in Columbia, MO so Zone 4 Mixed Humid. I had never heard about drywall on the outside…"
3 hours ago
Sean Lintow Sr replied to Tony Rigdon's discussion Placement of 5/8" firewall, over or under foam board insulation?
"I am pretty sure he is talking about using commercial drywall designed for this type of purpose and…"
5 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service