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Premium Mechanical and Automation Can Assist You
to Increase Profits, Enhance Productivity and Shave Budgets
Premium offers Total Building
Tune-ups
Because the building
is part of the air conditioning system
Call to request a
facility survey to develop tune-up scope and pricing.
Questions
for Facility owners-
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What percentage
of utility cost is for heating and cooling?
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What are
heating and cooling equipment repair costs per year?
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How much is
budgeted and spent for preventative maintenance per year?
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Has a thermal
comfort survey been conducted for facility occupants?
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TOPIC |
SUMMARY |
POTENTIAL EFFECTS |
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Fan Controls |
90% of commercial buildings studied had intermittent fan operation. A
second on-site survey indicated up to 50% of buildings had intermittent fan
operation. Effective ventilation rates reduced to about 5 cfm/person |
66% reduced fresh
air
Improper building
pressurization
Risk of indoor air
quality degradation
Risk of facility
degradation |
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Economizers |
Short term monitoring of 250 units with economizers found only 16% of
economizers functioning properly |
5-50% plus
efficiency loss (depends on geographical area and weather trends) |
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System Sizing |
Short term monitoring of 250 units found oversizing evident; over 60%
of the units had at least 3 on/off cycles per hour under peak load
conditions |
10% plus higher rate
of reliability issues
Risk of indoor air
quality degradation |
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Air distribution
systems |
50% of facilities studied had duct systems outside the conditioned
envelop.
In another study 42% of facilities tested used building cavities as
air distribution systems; many were outside the building thermal or air
infiltration barrier |
20% plus higher rate
of facility degradation due to mold and mildew
15-20% energy
savings could be realized from air duct sealing |
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Unit air flow |
Measurements of air flow show rates generally below manufacturer's
recommendations.
Other monitoring concluded installed fan energy exceeded standardized
assumptions |
10% efficiency loss |
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Refrigerant charge |
Refrigerant charge test studies show 60% of units improperly charged.
Similar data was gathered in another study with nearly identical
results. |
10-20% efficiency
loss |
Energy Recover Wheels- An informal review of
surveys conducted by Premium on facilities using energy recovery components is
running at 25% failure which results in increased risk of excess humidity
levels since the fresh air is not properly dehumidified and cooled before
entering evaporator. Estimated 20-35% efficiency loss.
THE ABOVE CONDITIONS MAY CONTINUE INDEFINITELY UNTIL (a) the
facility indoor air quality or the building itself has degraded to a
noticeable degree (b) enough of the air conditioning equipment mal-functions
to the point of failing to provide an acceptable comfort level to occupants
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