human side of net zero - rocky mountain green
TRANSCRIPT
Tom Hootman, AIA, LEED AP BD+C
RNL, Director of Sustainability
Shanti Pless, LEED AP
NREL, Commercial Buildings Research Group
Michelle Slovensky, LEED AP BD+C
NREL, Senior Sustainability Manager
Heating 12.5%
Cooling 9.5%
Fans 2.8%
Pumps 1.5%
DHW 1.0%
Lighting 28.0%
Equipment 44.7%
DOE Commercial Reference Building: Large Office, Boulder, CO
Radiant Ceilings
Thermal Mass Walls
Operable Windows
Underfloor
Ventilation
6 watt task light
50 fc
Ambient daylight
Ambient lighting with
daylight sensors for 25 fc
Concrete Walls
No Ceiling
Minimal Walls and
Partitions
80%
10%
MANAGER TRAINING NEWSLETTER
MOVE MEETINGS
STAFF OPEN HOUSE
RSF EMAIL BOX
WEB PAGE
You have switches – use them
If you open a window – close it
If you are stuffy – open your window
If you have a glare issue – pull your shade
Turn on your power strip in the morning
Buildings are for people, so
where are they in the feedback
loop?
What is the
occupant’s role?
The Building Agent
app enables
occupants to
quantify and
communicate their
comfort levels to
the building.
• Four of the six thermal comfort
factors defined by ASHRAE
Standard 55 (ASHRAE 2004) are
addressed in the BA feedback
interface:
– Air and Radiant temperature
– Air speed
– Humidity
• Future versions of the app will add
methods to collect details on
occupant clothing and metabolic
rate, the two remaining comfort
factors
• The survey consisted of 65
questions based on LEED
requirements and examples
from the Center for the Built
Environment
• The app may be used to
disseminate other surveys in
the RSF or in other buildings
across the NREL campus
Cre
dit:
Marj
orie S
chott(N
RE
L)
Correlate local measurements to occupant feedback
“Phidgets” collect
temperature,
humidity, and light
readings through a
USB port on
occupant’s
computer
Temperature Comfort
Humidity
Comfort
LightingComfort
GlareComfort
NoiseComfort
AirMovement
Comfort
TempC°
LightingLux
Humidity%
Timestamp
Cold Dry Glare Noisy 23 354.0 28 05/23 17:13
What about
occupant comfort?
OFFICE EQUIPMENT
Laptop 30 Watts
LCD Monitors 30 Watts
LED task lights 6 Watts
VOIP phones 2 Watts
iGo Power Smart Towers
Shared Multi-function Devices 100 Watts (continuous)
Workstation Total 68 Watts
300W continuous power draw per person
NOISE LEVEL / PRIVACY
PINK NOISE
0
5
10
15
20
25
Bright Dark Too much variation over time Very bright Very dark
East
North
South
West
Of the 273 survey responders
workspace lighting
dissatisfaction was reported by:
26% of those facing east
29% of those facing west
44% of those facing north
51% of those facing south
Typical facing direction
in RSF layout
Num
ber
of P
eople
WORKSPACE LIGHTING
Of the 273 survey responders
glare was reported as a problem
for:
36% of those facing east
31% of those facing west
46% of those facing north
58% of those facing south
Typical facing direction
in RSF layout
Num
ber
of P
eople
0
5
10
15
20
25
30
35
40
45
1 hour or less 1 to 4 hours More than 4 hours
East
North
South
West
GLARE CONTROL
Comfort Feedback from January 10 –June 6, 2012
Comfort Feedback from January 10 –June 6, 2012
MEASURING TEMPERATURE
OPERATIONAL CONTROLS
CBE STUDY
Which of the following do you personally adjust or control in your workspace?
WINDOW USE
WINDOW USE
9%
17%
9%
9%
43%
26%
20%
20%
89%
3%
54%
66%
0% 20% 40% 60% 80% 100%
Other:
Management requests that you open the window
A co-worker requests that you open the window
For nighttime cooling
To conserve energy
To experience the variety of the outdoor climate
To hear outdoor sounds
To let out indoor smells, dust, or other pollution
To let in fresh air
To feel warmer
To increase the air movement
To feel cooler
% respondents
N=35
WINDOW USE
REASON TO OPEN A WINDOW
WINDOW USE
REASON TO CLOSE A WINDOW
9%
54%
17%
29%
14%
57%
46%
17%
46%
60%
51%
0% 20% 40% 60% 80% 100%
For safety or security reasons
To conserve energy
To keep out bugs
Management requests that you close the window
A co-worker requests that you close the window
To reduce outdoor sounds
To keep out outdoor smells, dust, or other pollution
To reduce the air movement
To feel warmer
The outdoor temperature is getting warmer thanindoors
To feel cooler
% respondents
N=35
So
uth
.win
dow
Sou
th.n
o.w
ind
ow
No
rth
.no.w
ind
ow
No
rth
.win
dow All
All
2nd
3rd
4th
61%
18
67%
15
71%
7
75%
16
65%
62
50%
8
71%
7
100%
1
83%
6
70%
23
100%
3
100%
4
100%
3
75%
4
87%
15
57%
7
25%
4
50%
2
67%
6
50%
22
Satisfaction with Temperature
−3 −1 1 3
Value
Color Key
TEMPERATURE
Database
LEED
NREL
Mixed-Mode
Naturally Ventilated
Legend Mean value
-0.13
0.40
0.92
0.32
1.43
RSF
TEMPERATURE
AIR MOVEMENT
So
uth
.win
dow
Sou
th.n
o.w
ind
ow
No
rth
.no.w
ind
ow
No
rth
.win
dow All
All
2nd
3rd
4th
78%
18
60%
15
43%
7
69%
16
68%
62
75%
8
43%
7
0%
1
83%
6
65%
23
100%
3
100%
4
67%
3
75%
4
87%
15
71%
7
50%
4
50%
2
50%
6
59%
22
Satisfaction with Air Movement
−3 −1 1 3
Value
Color Key
AIR QUALITY
So
uth
.win
dow
Sou
th.n
o.w
ind
ow
No
rth
.no.w
ind
ow
No
rth
.win
dow All
All
2nd
3rd
4th
78%
18
60%
15
71%
7
81%
16
73%
62
75%
8
71%
7
100%
1
83%
6
78%
23
100%
3
75%
4
100%
3
75%
4
87%
15
71%
7
25%
4
50%
2
83%
6
64%
22
Satisfaction with Air Quality
−3 −1 1 3
Value
Color Key
AIR QUALITY
Database
LEED
NREL
Mixed-Mode
Naturally Ventilated
Legend Mean value
0.27
1.21
1.44
1.63
2.25
RSF
PRODUCTIVITYPlease estimate how your productivity is increased or decreased
by the environmental conditions in this building (e.g., thermal,
lighting, acoustics, cleanliness):
76% of the respondents felt that their productivity
was improved by the IEQ conditions in the building
EMPLOYEE SATISFACTION