Energy Savings and Comfort of SIP Panels
Q. WHAT IS THE R-VALUE AND WHY DO R-CONTROL
SIP STRUCTURES OUTPERFORM CONVENTIONALLY
CONSTRUCTED BUILDINGS AND HOMES WITH THE
R-Control SIPs are manufactured in various thickness
with values of R-15, R-23, R-30, R-37, and R-45.
The R-value of a material or wall assembly was not
intended to be the measure of thermal efficiency of a
home. R-Value only measures resistance to heat loss by
conduction. Other forms of heat loss are convection,
radiation and especially infiltration (leakage). Conventional
framing with batt insulation promotes convection,
radiant and infiltration heat loss. Testing at Oak Ridge
National Laboratories (ORNL) showed that R-Control
SIP walls are far superior to conventional stick frame and
batt insulated walls. A 4-1/2” R-Control SIP panel was
45% better than 2x4’s with R-13 batt insulation and in fact
was also better than 2x6’s with R-19 batt insulation.
Q. WHAT IS THE AIR LEAKAGE OF R-CONTROL
A. ORNL tested R-Control SIPs
side by side with stick
construction. The results were impressive – the air
leakage from the R-Control SIP construction was less
than 10% of the stick construction. This translates into
a more comfortable structure with fewer drafts and
lower utility bills.
Q. SINCE R-CONTROL STRUCTURES ARE SO AIR TIGHT, DO
THEY REQUIRE ADDITIONAL HVAC CONSIDERATIONS?
Yes. The increased R-value and lower air leakage
means that heating and cooling equipment must
be designed for a high performance structure. This
translates into lower capacity heating and cooling
units and most importantly lower cost units. Since
R-Control SIP structures are so air tight, air exchangers
are required as part of the HVAC system to bring fresh
air into the structure while simultaneously exhausting
air from the structure to ensure optimum indoor air
quality. Comfort to the occupants is unparalleled.
Q. HOW DO R-CONTROL SIPs HELP THE ENVIRONMENT?
Many ways! The raw materials in R-Control SIPs
have low energy requirements to make them. The
structural facings of R-Control SIPs are made from
renewable controlled growth wood resources. For
years and years R-Control SIP structures will save fuel
used for heating and cooling. The resulting pollutants
from burning fuels like natural gas, oil and coal are dramatically
reduced. The environment is then spared the
contributing “green house” effect of burning additional
fuels that conventionally built structures require.
Q. CAN R-CONTROL SIPs BE USED FOR GREEN
Yes. R-Control SIPS have been used to build many
homes and office buildings that achieve EPA’s ENERGY
STAR Ratings or USGBC’s LEED Certification
SIPs are a main component used in ORNL’s NetZero
Energy homes as well as the building system of choice
by many leading universities for the Solar Decathalon