Partner of the year. well done!
Tech geeks? this crowd? Deffinitly!
Is one of these units being provided to/procured by PG&E, to provide performance data for CBECC-Com?
I don't think it's on the current work plan. If AO Smith could donate a unit I'm sure they will test it
nice size profile!
I would use this in apartment complexes to provide domestic hot water to 1-3 floors via a manifold for each apartment with 3/8th inch piping, with no recirculation—just rapid delivery.
Great point on Kitchen AC benefits!
You do such nice projects, Sean. Glad you are excited about this.
What type of refrigerant are you using?
Yep—the sweet spot in hot water design, both construction costs and energy savings, is a non-recirculation system to lots of apartments. That works well with 3/8th inch piping and WaterSense quality delivery time, while saving $3000 per apartment.
Thank you for the presentation! 1. Can it be ducted to outside? 2. What is the EWT for the rated COP? Could these units be used for recirculation applications (if needed)? 3. Will it be responsive to utility signals at some point?
I want to know how to put it in a small space and vent it outdoors. That would work best for placing in the central elevator lobby on each floor.
For Department of Health applications, there are sizing and recovery requirements to make sure delivery at required temperatures is available at all times. Is it possible to determine an actual recovery with these units?
Hi Sean how do you make sure there are enough air movement for these mini central systems?
Thank you for your support for Energy Star in these trying times for the program. The support of companies like AO Smith are critical for its continued existence. God to see you guys stand up and make your voice heard on this.
good, not god.
Does it make sense to provide a chart of gallons per day and associated ton-hours per day of cooling provided? (or gallons/day and associated kbtu/day of cooling provided.)
The engineers in five different projects use two 80 gallon tanks in the elevator lobby, serving 5-11 apartments. The venting is to lobby and hallways.
What is the MSRP on this unit?
We love Francois!
Per floor, I see 4 to 6 tanks per floor, with the other sets of two 80 gallon tanks at the end of the hallways. Some engineers have vented them outdoors as well, so I’ve see both indoor and outdoor venting from these central locations.
@Tom Kabat...was that in response to my question?
One of the unintended consequences I've heard about commercial HPWHs in restaurant kitchens is hot water use may go up as soon as back room employees realize hot water use causes cold air!
Sean that would be the way to go, when we mentioned mini central systems some people were concern that there will be more infiltration. Just FYI central HPWH under 8 units per system without recir can be modeled in CBECC already
Interesting--what about small-mediumlaundromats
What kind of refrigerant does the system use?
Is this currently being incentivized by any utilities/programs?
Is it possible to lock out the resistive heating elements, or require manual intervention before they are engaged? I think behavior might change if users appreciate how frequently (or hopefully infrequently) they are used.
If the space does not have 3200 cubic ft of space, can louvers be utilized?
Can you explain why it doesn't make sense to try to preheat with solar thermal?
Delta T will be much lower, therefore the COP will be lower....makes more sense to power the HPWH with PV instead
Thank you very much Bill.
yes. Exactly. Just wanted to be sure everyone understands the Delta-T is critical to efficiency and acheiving full condensing of refrigerant. Have heard people speculate about combining the two, and its not a good idea...
Since not possible to lock out resistive heating element, is there at least feedback on when and how often it is used?
Thank you, Bill!
Wouldn’t moving both resistance elements to the upper location allow you to achieve a higher than 150 gallon first hour rating? e.g. using the hour to deliver 170 gallons of hot water while leaving the tank bottom cooler at the end of the test.
Awesome presentation, thank you!
Thanks Bill, looking forward to more AO Smith innovations moving forward!