Building Management Hawaii February/March 2014 - (Page 28)
HVAC: Top Trends
Unloved but important home products get reinvented.
By Drew Santos
L
eading trends in air conditioning
for 2014 include Variable Refrigerant
Flow (VRF) and Multi-Zone Systems,
along with Smart Thermostats and
Advanced Duct Systems.
HVac
Industry Innovations
Technology and efficiency are
key factors in the quickly changing
HVAC market. For example, the NEST
Learning Thermostat was developed
by some of the same software
engineers that designed for Apple
computer products. The NEST doesn't
need to be programmed. It remembers
the temperature you set and builds
a personalized schedule for you.
NEST turns itself down when you
are away to help
save energy and
you can change
the temperature
from anywhere
using your
smartphone,
tablet or laptop.
Innovations
in equipment
The NEST
Learning
Thermostat
design and thermostats are only
the beginning. Admor HVAC is
also seeing a revolution in the
way building owners duct cool air
throughout a building envelope.
For instance, Knauf KoolDuct is a
high performance, pre-insulated air
ducting system specifically designed
for the demanding requirements
of the residential and commercial
markets. It offers many competitive
28
February-March 2014
BMH
advantages over conventional sheet
metal duct systems. The major
advantage is that the KoolDuct system
eliminates fiberglass from the air
stream. There is no fiberglass wrap or
liner with the KoolDuct system. With
an R-Value (the measurement thermal
resistance ) of 6, it is 40 percent more
efficient than standard wrapped or
lined ducts.
The KoolDuct System is
constructed with chlorofluorocarbon
(CFC)-free phenolic foam board and
patented aluminum flanges. Both
sides of the KoolDuct are sealed so
that air only flows on aluminum,
making it ideally suited for high
specification applications. The product
is ultra-lightweight yet strong enough
to handle abuse and even the weight
of several large adults.
SEER-ing Good Rates
The efficiency of air conditioners
is often rated by the Seasonal Energy
Efficiency Ratio (SEER). The SEER
rating of a unit is the cooling output
during a typical cooling-season
divided by the total electric energy
input during the same period. The
higher the unit's SEER rating the
more energy efficient it is. While
we will see a change in the national
minimum rating go from 13 to 14
SEER, there are many systems that
deliver 20 to 27.2 SEER.
For 2014, the ongoing trend of
energy efficiency continues to drive
HVAC products toward new and
better technologies. When it comes to
energy efficiency, Fujitsu is leading
the way with VRF and Split System
technology that saves energy and
money. Fujitsu VRF systems are
designed for commercial buildings
and allow the building owner to
"zone" the air conditioning load so
that only rooms that are occupied or
require cooling are being cooled. By
utilizing smaller indoor air handlers,
which circulate conditioned air,
Fujitsu HFI System
each room is individually computer
controlled to minimize operating
time and maximize savings. This is
in direct contrast to a large chiller
or package unit air conditioning
system that comes on all at once and
cools all spaces whether the rooms
are occupied or not. VRF technology
brings precise temperature control
to each zone and can be controlled
from a central remote control or by a
remote computer system.
For those non-commercial
buildings, Fujitsu has introduced an
advanced line of multi-zone systems
called Hybrid Flex Inverter (HFI).
The HFI System is less expensive
than a VRF system and allows you to
cool up to eight zones from a single,
compact and quiet outdoor unit. The
HFI System is ideal for single-family
homes, condominiums and light
commercial applications where threephase power is not available.
Both the VRF and HFI systems
utilize inverter compressor
technology. Inverters are a big reason
why we are seeing a rapid increase in
SEER ratings. Inverter compressors
do not come on at full speed and
run 100 percent like traditional
compressors. Instead, an inverter
compressor ramps up and down
slowly depending on the cooling
load. This allows for a "soft" start
at minimum amperage draw. As
the cooling load increases so does
the speed of the compressor. The
beauty of an inverter is that if the
compressor only needs to run at onequarter speed to meet the cooling
load, it automatically ramps down
and uses less energy.
Another inverter product is the
Maytag IQ Drive Air Conditioning
System. With SEER ratings upwards of
24, these are the most energy efficient
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Table of Contents for the Digital Edition of Building Management Hawaii February/March 2014
ENERGY MANAGEMENT
Engineered Efficiency: A Holistic Approach
Why Host An EV Charger
The New Age Of Energy Metering
Are You On Island Time?
Time To Stay Cool
Through The Tinted-Glass, And What Savings You’ll Find There
SECURITY
Managing Off-Site
Safe & Secure
HVAC: Top Trends
EDITORIAL Notes
An Industry Unites At Expo 2014
The (Often Overlooked) Success Factor
On Site: Men At Work
Building Management Hawaii February/March 2014
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