Retrotec USACE - Manual (Page 98)

76 ENERGY & PROCESS ASSESSMENT PROTOCOL
TABLE 2. CAUSES OF ENERGY WASTE AND INEFFICIENCY IN HVAC SYSTEMS. (Continued)
Problem description Waste/ineffi ciency Reference/appendix
Heating
and cooling
systems Use of forced air heating in large, high bay areas Ineffi ciency D2.2.1
Heating or cooling unused spaces Waste D2.2.2
Heating building with only unit heaters Ineffi ciency D2.2.3
Clean hot air/gases warmer than 93 °C (200 °F) being
exhausted outside Waste
D2.2.4
Failure to reset temperature of unoccupied spaces Waste D2.2.5
Temperature stratifi cation with heating Ineffi ciency D2.2.6
Temperature setting below dew point Waste D2.2.7
Ineffi cient dehumidifi cation systems Ineffi ciency D2.2.8
Poor selection of cooling/dehumidifi cation coils Ineffi ciency D2.2.9
HVAC systems supply air with no reheat Waste D2.2.10
Poorly insulated fan-coil units are located in not condi-
tioned space. Waste D2.2.11
Unnecessary low room air temperature resulting in dis-
comfort, energy waste, and condensation on cold surfaces
= mold in these spaces Waste D7.11.1
Simulation equipment is conditioned using DX units con-
nected to training modules. DX condensers reject heat in
the air-conditioned space Waste D7.11.2
Simulator manned modules rejects heat into the air-
conditioned bay, increasing the cooling load on the air-
conditioning system Waste D7.11.4
Computer server rejects heat into the air-conditioned space,
increasing the cooling load on the air-conditioning system Waste D7.11.5
HVAC
distribution
systems No duct and piping insulation Waste D2.3.1
Inoperable dampers Waste D2.3.2
Loose fan belts Ineffi ciency D2.3.3
Duct air leaks Waste D2.3.4
Excessive airfl ow Ineffi ciency D2.3.5
No use of water condensed through air-conditioning process Waste D2.3.6
Use of excessive dampers to achieve air balance Ineffi ciency D2.3.7
Dirty fi lters or coils Ineffi ciency D2.3.8
Water leaks from piping system Waste D2.3.9
Steam leaks from piping systems Waste D2.3.10
Steam traps not maintained Waste D2.3.11
Chilled water pipes do not have suffi cient insulation Ineffi ciency D2.3.12