HomeMy WebLinkAboutENERGY CONSERVATION IN LDGS - 06-91 - SUBMITTAL DOCUMENTS - ROUND 1 - Supporting Documentation (5) Develop. _nt Services
Planning Department
Ili MEMORANDUM
City of Fort Collins
TO: Peter Barnes
Mike Gebo
Sheryl Helms
Dennis Sumner
Doug Swartz
FROM: Sherry Albertson-Clark, Chief Planner
RE: Energy Conservation in LDGS Point Charts
DATE: February 1, 1991
Attached is the draft of my report "Energy Conservation: Standards
and Methods for Awarding Points on Non-Residential Land Development
Guidance System Projects". This report was made available to the
public at an open house held last evening.
we are proposing two methods for calculating energy conservation
measure points/percentages, with the idea that these methods offer
a way of dealing with the variations in project scale, land use and
stage of building design. The response last night to these methods
was positive; howver, I would also like your convents, ideas and
suggestions. Please have your reponse to me by Monday, February
11, 1991. Thank you!
281 North College Avenue • P.O. Box 580 • Fort Collins, CO 80522-0580 • (303) 221-6750
MISSION STATEMENT
To establish clear standards to use in evaluating and awarding
energy conservation points for non-residential planned unit
developments.
RECOMMENDATIONS
1. Points should continue to be offered as an voincentivell in the
LDGS for energy conservation.
2. The standards and methods developed should be flexible enough
to deal with a variety of development situations, including
variations in scale and land use and should encourage good building
siting and design, as well as the use of alternative energy
systems.
3. The Model Energy Code will serve to establish the reference
point for exceeding minimum City Code.
4. The energy conservation criteria should be added to the
Neighborhood Convenience Shopping Center (NCSC) Point Chart.
5. The commitment for energy conservation points, using either
method, must be made at the time of preliminary plan review by the
Planning and zoning board.
6. A limitation should be placed on the amount of reduction in
energy conservation points that would be permitted.
7 . Certification by a professional engineer, licensed in Colorado,
will be required with documentation of the energy conservation
measures at the time of building permit application, for those
projects utilizing Method One.
S. There are several options that need further consideration for
addressing the awarding of energy conservation points for the re-
use of an existing building.
9. Close coordination between the Development Review Division and
Permits and inspections Division will be necessary to assure
implementation of all energy conservation measures.
IMPLEMENTATION STEPS
1. Revise all applicable LDGS Land Use Activity Point Charts to
reference the methods of calculation for awarding energy
conservation points and adjust weighting factors. Add energy
conservation criteria to the NCSC Point Chart. Adopt by ordinance.
2 . Revise LDGS preliminary PUD plan submittal requirements to
include completion of the worksheet and energy conservation
commitment as a preliminary submittal requirement. Adopt by
Ordinance.
3. Create a worksheet for energy calculation purposes. Include in
Appendix of LDGS. Adopt by Resolution.
4. Develop standard notes to use on site plans identifying those
projects that have received energy conservation points.
5. Update Development Manual to address methodology, worksheet and
submittal requirements.
6. Revise Administrative Change criteria to address reductions in
energy conservation points.
7. Develop a coordination and monitoring plan with Permits and
Inspections Division.
METHODS
METHOD ONE: Direct comparison to Model Energy Code. This method
awards points based on the extent the proposed building exceeds the
minimum standard. Certification will be required to demonstrate
that the annual energy consumption will be x% less than the same
building just meeting the minimum standard.
15 - 25% less (than Model Energy Code minimum) 1.0 point
26 - 35% 2 .0 points
36 - 45% 3.0 points
46% or more 4.0 points
METHODS
METHOD TWO: Points will be given for the implementation of any of
the following energy conservation measures, in an additive fashion:
1. Long axis of building is e/w 0.2
2. Ratio of wall area to floor area is less than 1. 5 0.3
3. Mass of exterior building walls greater than 30 lb/sq ft 0.2
4 . Passive solar utilized by building hearing system, savings
fraction 0.4, minimum 3.0
5. Daylighting utilized, with automatic insulated covers, R-2.5
minimum 0.3
6. Overall wall U < 0.2 1.0
7. Overall roof U < 0.06 0.3
8. Reflective glass or film used 0.2
9. Vestibules or revolving doors used 0.2
10. Automatic night/weekend temperature setback is provided 0.4
11. Economizers used for fan systems of less than 5000 CFM 0.2
12. Low leakage outside air and exhaust air dampers uses - 1%
leakage max. at 5" W.C. 0.2
13. Variable air volume system used, with inlet vanes or variable
speed drives 0.2
14 . High efficiency motors used 0.1
15. Water-cooled condensers used for mechanical cooling
systems 0.2
16. Evaporative cooling used in lieu of mechanical cooling 0.4
17. Boilers or furnaces used with firing efficiencies greater
than 82% 0.2
18. Automatic spark ignition used for gas-fired boilers,
furnaces, unit heaters, etc. 0 . 1
19. Automatic dampers used in combustion air intakes 0.1
20. Outside air reset used for boiler supply water temperature
control 0.1
21. Exhaust or condenser heat recovery utilized 0.2
22 . Waster water heat recover utilized (car washes, laundries,
etc. ) 2 .o
23. Ice or low temperature water storage system utilized for off-
peak air conditioning and reduced air conditioning equipment
sizes 1.0
24 . Electric resistance heat not used 0.2
25. Night air used for pre-cooling space 0 .1
26. Energy efficient fluorescent lamps and electronic ballasts are
used 0.2
27 . Motion detector lighting control is used 0.2
28. Lighting watt density less than 2 W/sq ft 0.3
29. Light interior colors are used 0. 1
30. Building uses active solar, geothermal, wind, or other non-
depleting energy source, savings fraction 0. 4 minimum 3.0
31. Radiant heating used in lieu of unit heaters 0.2
32. Roof cooled with water spray 0.1
33 . Windows are shaded from summer sun (overhangs, blinds, drapes,
trees, etc. ) 0 .2
34. Computerized energy management system is used 0 .3