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: 200

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

Bud Poll replied to Bud Poll's discussion Another benefit from air sealing
"From my work in NY City many years ago, the critters I saw would never have fit through a quarter…"
1 hour ago
Barbara Smith replied to Bud Poll's discussion Another benefit from air sealing
"Eliminating quarter sized holes can impede rats from entering a building, in areas where rats tend…"
2 hours ago
Casey Murphy is now a member of Home Energy Pros
3 hours ago
Walter Ahlgrim replied to James White's discussion What happened to Home Energy Pro's website?
"Try downloading Google Chrome web browser https://www.google.com/chrome/browser/ I had similar…"
19 hours ago
Stacy Hunt posted an event

Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements at Virtual

September 24, 2014 from 3pm to 4:30pm
The Building America Program is hosting a no-cost, webinar-based training on Multifamily…See More
21 hours ago
Ben Jacobs replied to Bud Poll's discussion Another benefit from air sealing
"This is info I give to clients that I serve. People who live in homes that are not energy efficient…"
23 hours ago
Brennan Less replied to Bud Poll's discussion Another benefit from air sealing
"Thanks Bud. I just feel the need to point out any such issues, because we as a field need to be…"
yesterday
Bud Poll replied to Bud Poll's discussion Another benefit from air sealing
"Hi Brennan, "weak and irrational" is not at all what I was trying to communicate. …"
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service