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2018 Seattle Energy Code – Public Meeting Preparation Session #4 - Shared screen with speaker view
Haley Krommenhoek (Rushing)
10:09
hope everyone is thinking hard about their questions! :)
Duane Jonlin, Seattle
11:18
yes, I've noticed
David Glassman
11:58
I'd like to get a broad-brush summary of the likely architectural design impacts from the new Code. Obviously we'll need to dive into each project, but any general guidance would be appreciated
DavidR
12:18
Interested in going through the new heat pump DHW requirements.
Rand Conger
13:48
What is the status of the requirement of AHRI certification for air-to-water heat pumps, since it appears there are no current certified units on the market.
Sam Douglas
14:21
what are the options for heating downstream of an ERV if you don't have heating water on site and since we can't use electric resistance anymore? Typically I exceed the 5% electric resistance allowance per exception #7. drives design to HPs and has big cost impacts
David Glassman
19:47
I'm looking for broad brush guidance for designers at the very start of the project until such time as we hire you guys to help us focus on the details.
tim zielke
21:01
RE: no longer having gas. If a project currently under design/permitting with gas stoves at what point will the city of Seattle require said building to be retrofitted to switch over to electric.
David Glassman
22:08
VERY HELPFUL! Thank you.
Daniel Silva
24:01
Referent to table C403.3.2(13). Most AWHP are not able to reach 140F LWT.It does not make sense that a system that is designed to work at 120F HHW needs to meet a 140F target.There aren’t many units today that meet these targets, but if we force the units to meet all the values (105 / 120 / 140 F at 47F and 17F OAT), then there aren’t any units available in the market that can do it!
Duane Jonlin, Seattle
24:06
Note Seattle exception to C402.1.3 for reduced garage shaft insulation in prescriptive code
Lee Richardson, CFM
34:36
How would this affect existing systems/
Lee Richardson, CFM
35:15
Existing AW HP system
Bryce Engen
41:45
I'm concerned about projects upcoming where property is getting more scarce downtown, therefore footprints are very small on midblock developments. Thus, rooftop space is at a premium. How will we be able to fit all this equipment on the roof given AWHP's now required and previously the boilers could be located indoors? Do these projects just not pencil anymore or are electric boilers a realistic option in these cases?
Ty Wasserman
43:13
could you just have restrictions on ERV size, CFM up to xxx and then have a temperature that you must set the tempering to?
Lee Richardson, CFM
48:05
Thanl
Lee Richardson, CFM
48:13
Thank you
Duane Jonlin, Seattle
54:57
...or better windows
Dave Nehren (Hermanson)
55:43
The glazing % in the corner units will need to be limited and window performance increase
tkuhn
55:56
I am concerned with added insulation in parking garages (as well as many other things). My understanding is that the new building code is bringing with it around a 30% increase in seismic resiliency in Seattle high-rise buildings. In talking with structural engineers, this may mean that concrete core walls will increase from 36" thick to 48" thick - effectively taking 2 feet out of a parking garage. For the architects in the meeting - how would a typical 40 story site work with this and added insulation? I don't think it will with minimum drive aisle requirements and parking stall depths, for a typical site in Seattle.
David Glassman
57:50
Too many moving parts to answer this properly or comprehensively.
Bryce Engen
58:25
parking systems limit what you can do w/ MEP in the garage, I'm living that nightmare now
Lee Richardson, CFM
58:30
Thank you Rushing. Next time.
Patrick Merritt
58:31
Stacked parking doesn't 'pencil' yet
David Glassman
59:37
Just conditioned spaces???
Duane Jonlin, Seattle
01:00:59
We allow R-5 continuous for garage-level insulation. This can be done with 1" of Dryvit-type insulation. Exception to C402.1.3
Duane Jonlin, Seattle
01:02:07
prescriptive only
Dave Nehren (Hermanson)
01:03:42
Use could increase the overall R value for floors prescriptively from R-30 to R-38 to offset this minor loss. Slight more cost and easy to implement and would work into the C407 and UA calcs...
Duane Jonlin, Seattle
01:04:22
sorry I was wrong - the exception is available for modeling
Bryce Engen
01:04:52
thanks team rushing!
danderson
01:04:56
Thank you Rushing Team!!!
Kevin Boyles
01:05:12
Thanks!
Sean Ludviksen
01:05:22
thank you Rushing!