| |
lowest estimate |
avg. estimate |
highest est. |
Your estimate |
| Monthly
Benefit /Office (per below)
[1]
|
$31.99 |
$141.09 |
$1,057.27 |
|
| Time
to Breakeven |
immediate |
immediate |
immediate |
immediate |
| ROI
[2]
|
214% |
944% |
7072% |
|
| NPV /Office
[3]
|
$2,417 |
$18,279 |
$151,486 |
|
| |
|
|
|
|
| |
|
|
|
|
| I.
Reduce Costs (savings /office /month) |
|
|
|
|
| |
|
|
|
|
| |
Low Waste |
Avg. Waste |
High Waste |
Your Waste |
| HVAC
Energy Costs |
|
|
|
|
| · HVAC
not synchronized with employee work hours |
10%
[4]
|
21%
[5]
|
27%
[6]
|
|
| (eg: 9hr workday w/ HVAC on 12hrs -->25%
waste) |
|
|
|
|
| · Avg% workers away
from desk during day, and can |
10%
[7]
|
25%
[8]
|
35%
[9]
|
|
| turn off HVAC (lunch, meetings, sales calls,
etc.) |
|
|
|
|
| · Discretionary
Vacations (1, 2, or 4 weeks / year) |
2% |
4% |
8% |
|
| · Days
out-of-office: Travel, Offsites, Sick/PTO, etc. |
2% |
4% |
6% |
|
| · Lower
utility bills by load shedding & central mgnt
[10]
|
0% |
5% |
10% |
|
| · Offices/areas
sometimes or always unoccupied |
4% |
8% |
20% |
|
| - empty room, conf rooms, 2nd offices, etc. |
|
|
|
|
| · Eliminate
fan staying "On", per standard VAVs |
0% |
4% |
8% |
|
| · Reduce
inefficient space heater use (esp in summer) |
0% |
1.5% |
3% |
|
| Wasted
Airflow to Unneeded Areas/Periods |
26% |
59% |
79% |
|
| Minus
25% to be Conservative |
-7% |
-15% |
-20% |
|
| Net
Reduced Airflow & Energy Usuage |
20% |
44% |
59% |
|
| Times average
office size (# square feet / air register) |
75 |
100 |
125 |
|
| Times
HVAC energy cost / month ($$ /sqft /mo)
[12]
|
$0.40
|
$0.50 |
$0.60
|
|
| Fuel Saving /office /month |
$5.90 |
$22.10 |
$44.25 |
|
| |
|
|
|
|
| HVAC
Maintenance Costs |
|
|
|
|
| · #
months between trips to adjust Thermostat /office |
100 |
80 |
60 |
|
| Cost per trip |
$60
|
$90 |
$130 |
|
| Maintenance Saving /office /month |
$0.60 |
$1.13 |
$2.17 |
|
| |
|
|
|
|
| HVAC
Equipment Costs |
|
|
|
|
| · Lower
cost / Longer life for HVAC equipment |
15% |
33% |
44% |
|
| Avg
HVAC equip & service costs / air register |
$500
|
$1,000
|
$2,000
|
|
| Equipment Savings /office /month |
$0.41
|
$1.84 |
$4.92 |
|
| |
|
|
|
|
| COST
SAVINGS: $$ / OFFICE / MONTH |
$6.91 |
$25.06 |
$51.34 |
|
| |
|
|
|
|
| |
|
|
|
|
| II. Increase Workhours & Productivity |
|
|
|
|
| |
|
|
|
|
| |
Low Gain |
Avg. Gain |
High
Gain |
Your Gains |
| Increase Workhours (add'l min / 8hr day) |
2 |
4 |
8 |
|
| · Fewer breaks to warm up, cool down, or re-energize |
|
|
|
|
| · Arrive earlier, leave later, work more weekends |
|
|
|
|
| · Reduce PTO (1 day / yr is ~2min / day) |
|
|
|
|
| |
|
|
|
|
| Comfort
Gains (percentage of employee salary) |
0.5% |
1% |
2% |
|
| · Work more efficiently: better concentration, motivation |
|
|
|
|
| & energy. Less fatigue |
|
|
|
|
| · Better
meetings in conf rooms: temp, oxygen, humidity |
|
|
|
|
| · Better
espirit-de-corps to company, mamagers & others |
|
|
|
|
| · Better recruitment & retention |
|
|
|
|
| Times avg. salary / employee / month |
$2,000 |
$3,000 |
$5,000 |
|
| Plus avg. cost of taxes + Soc. Security + benefits |
30% |
40% |
45% |
|
| Times employee ROI (value / cost) to company |
105% |
120% |
150% |
|
| Times avg. # of workers / air register |
1.0 |
1.25 |
2.5 |
|
| |
|
|
|
|
| PRODUCTIVITY
GAINS: $$ / OFFICE / MONTH |
$25.08 |
$116.03 |
$1,005.94 |
|
Approach
