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: 273

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

Forum Discussions

Tankless Water Heaters... has their time finally come?

Started by Bob Blanchette in General Forum. Last reply by Stanley Layman 1 hour ago. 33 Replies

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by John Hatfield 16 hours ago. 9 Replies

Psychrometric Chart Training

Started by John Krochmalny in Training yesterday. 0 Replies

Dirty solar panels

Started by Evan Mills in General Forum. Last reply by Stacie Bagnasco on Monday. 1 Reply

Latest Activity

Marc Tannenbaum's blog post was featured

3 Issues HVAC contractors Should Know About Impacting Customer Comfort and Health

There is an epidemic of people suffering in many of the 100 million homes across the U.S.  Many of…See More
36 minutes ago
Profile IconPaigh Bumgarner, Blake Reid, James Barras and 3 more joined Home Energy Pros Forum
44 minutes ago
Stanley Layman replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"A tankless water heater can be a bit pricey. Tankless water heaters can range from $300 to $1100 or…"
1 hour ago
John Hatfield replied to David Butler's discussion How would you insulate this roof?
"David I think the finish edge application is critical but several un-knows exist. Such as how far…"
16 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"@Kevin, that article is behind a pay wall. Here's the original posted on Allison's…"
17 hours ago
Kevin Miller replied to David Butler's discussion How would you insulate this roof?
"Good question.  I don't know the answer.   I'd love to know whether there…"
17 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"Hi John, thanks for pointing out my faux pas: I made clear in my original post that rainwater…"
17 hours ago
John Hatfield replied to David Butler's discussion How would you insulate this roof?
"Kevin, Is the "Kool Seal" product certified for potable water collection?"
17 hours ago

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service