Pozzotive Plus concrete masonry units (CMUs) and concrete facing brick are manufactured using up to 30% post-consumer recycled glass as a portland cement substitute and an average of 50% post-consumer recycled masonry aggregate from local sources in the Northeast. The recycled glass pozzolan (with the tradename Pozzotive), made by Empire Resource Recycling, LLC, is ground to about 15 microns (a finer powder than portland cement) and used in place of the cement, saving about one ton of CO2 for every ton of cement replaced.
Pozzotive Plus CMUs have been made with up to 90% recycled aggregate, though 50% is typical. Compared to conventional CMUs and brick, Pozzotive Plus products require less energy to produce, are stronger, and have greater moisture and chemical resistance, according to the company. Both products meet and exceed ASTM C-90 for Loadbearing Concrete Masonry Units and C-129 for Nonloadbearing Concrete Masonry Units, and the brick meets and exceeds ASTM C-1634 for concrete facing brick. The company’s brick is manufactured with a standard bed depth of 3-5/8" and is available in three sizes: Modular (2-1/4" x 7-5/8"); Ledge (2-1/4" x 15-5/8"); and Royal (3-3/4" x 15-5/8"). In addition a Partition brick is available for interior applications (5-5/8" x 3-3/4" x 15-5/8"). Architectural CMUs are available in a wide range of shapes and sizes. Both the brick and CMU come in nine standard colors, in either ground-face or suede finish.
Reviewed in EBN: November 2009
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Thermafiber makes a variety of mineral-fiber insulation products from pre-consumer recycled iron-ore slag for commercial and residential thermal, sound attenuation, and fire-resistant construction applications. Both batt and boardstock materials are available in a wide range of densities, facings, thicknesses, and R-values. Thermafiber products, according to the manufacturer, are noncombustible without flame retardants, are odor-free, will not absorb moisture or support mildew or fungus, and will not rot or decay. A urea-extended, phenol-formaldehyde binder (up to 3% by weight) is used to hold fibers together, but the manufacturing process results in very low residual levels of formaldehyde in the insulation. Measured formaldehyde emissions, as tested by Air Quality Sciences, are 0.012 parts per million (ppm) for the company’s batt insulation, compared with average background formaldehyde levels of about 0.20 ppm. These levels are far lower than the most stringent CARB Phase II formaldehyde emission levels for wood panel products.
Invelope steel and foam panels create a weather-tight backup wall system for metal-framed commercial buildings. Invelope provides a moisture and vapor barrier, drainage plane, and insulation—as well as a mounting system for brick veneer or terra cotta cladding—all in one panel system. Made from corrosion-resistant steel wrapped around a polyisocyanurate foam core and similar to Centria’s Formawall, Invelope comes in 32"-wide interlocking panels and is available in 12' and 20' lengths and in 2" (R-14) and 3" (R-21) thicknesses. A factory-installed, low-emitting butyl sealant in the groove ensures a tight connection between the panels, while a peel-and-stick membrane seals all corners and window and door openings. The panels are secured to the studs using masonry or terra cotta anchors in a way that minimizes thermal bridging and penetrations of the outer skin. Invelope panels are designed to integrate with Moeding’s Alphaton and Longoton terra cotta cladding (imported by Shildan).
Baltix commercial furniture is made with a wide range of green materials, including sunflower seed hulls, wheat straw, FSC-certified bamboo, FSC-certified MDF and veneers, and recycled plastics and paper. The company’s stock and custom workstations, tables, seating, and accessories (including bookshelves, files, cabinets, and partitions) are available with low-emitting, UV-cured clear coats or in a wide range of Marmoleum (linoleum) colors. Baltix uses biobased PLA (biobased polylactic acid) edge banding, instead of PVC or ABS, and frames are constructed of anodized aluminum (75% recycled content) or steel and available with a VOC-free powder-coat finish. In late 2009, the company introduced BioSurf, a new biobased laminate made from corn and soy. BioSurf Wave is an impact- and stain-resistant laminate, while Organic is a thicker, wear-resistant laminate that is available with 12 printed impressions, including those that mimic maple, cherry, bamboo, and cork. Custom, digital images can also be imbedded directly onto the material. BioSurf laminates meet the ANSI/NEMA LD3 standard for high-pressure decorative laminates and are currently available on Baltix tables and screens. Baltix will assist in proper reuse or recycling of their products at the end of their useful life.
Project FROG designs and custom-fabricates modular classrooms and other commercial buildings that feature high-performance envelopes, natural daylighting, high-efficiency mechanical systems, healthy materials, and green components. Built using central “spines,” different-shaped wings, porches, and mechanical rooms, the basic configuration is about 1,200 square feet but the sections can be joined together into structures larger than 5000 square feet. These modular classrooms provide an attractive, green alternative to conventional classroom trailers and come in wide range of price points, from relatively affordable trailer alternatives to state-of-the-art, net-zero-energy, LEED Platinum classrooms. Project FROG’s modular buildings can be assembled quickly with almost no construction waste yet are sturdy enough for zone 4 seismic areas and can withstand 110 mph winds. While the company was established with the portable classroom market in mind, a wide range of other markets are being pursued.
The Rheem HP-50 is an Energy Star-listed, heat-pump water heater with an integral 50-gallon tank. Intended for residential use, the HP-50 operates in three modes: Energy Saver mode uses the heat pump only (energy factor 2.0); Normal mode, for higher demands, uses the heat pump and one of two electric-resistance elements (energy factor 1.5); and Electric Heat Only mode relies solely on the electric elements, functioning like a conventional water heater for particularly high demands. These 75.5"-high, 21"-diameter units have an operating range between 40°F and 120°F and come with automatic freeze/overheat protection. The HP-50 comes with a 10-year limited warranty and is available through plumbing wholesalers. The Rheem HP-50 is not the highest-efficiency heat-pump water heater on the market, but it is the first relatively affordable, integral-storage, heat-pump water heater from a large national company to enter the North American market. It is also the quietest product on the market, rated at 49 dB, and has the longest warranty.
Convia, a Herman Miller company, has partnered with cabling and distribution leader Wiremold to offer a modular energy management platform that integrates lighting, switches, occupancy sensors, timers, and other devices and links them to sophisticated controls capable of monitoring and adjusting a building’s overall energy performance. Appropriate for new construction or retrofits, Convia’s infrastructure uses plug-and-play components that can be linked together to form larger zones, or pre-set to specific levels as needed in conference rooms, entryways, or office floors. Energy consumption data from the components and zones are gathered and displayed on monitors for easy analysis. Pre-set lighting, heating, and cooling levels can be automatically triggered for load shedding and demand response. Convia’s “Global Gateway” acts as an interface and controls the system, but components can also be programmed locally via a control wand. This highly adjustable, modular system can adapt to changes in building use.
Pentadyne’s GTX flywheel is a short-duration energy storage product used to replace batteries in uninterruptible power supply (UPS) in data centers, healthcare, manufacturing, and other commercial applications. Pentadyne utilizes a graphite-composite flywheel magnetically levitated in an argon-filled, vacuum-sealed unit to store kinetic energy for use when the normal power supply is disrupted and before a backup generator starts or power is restored. According to the company, the GTX supplies a continuous 200 kW for 12 seconds or more, replacing 40 lead-acid UPS batteries weighing four times as much and taking up twice the floorspace. Unlike a battery UPS, the GTX requires no additional HVAC, because it operates in a wider temperature range and doesn’t offgas. Standard lead-acid batteries typically use virgin lead and require regular maintenance, with replacement as frequent as every two years. Standby energy consumption of the GTX is 300 watts, similar to the float charge of a battery bank with comparable capacity.
The Silva Cell is a modular system that holds soil for tree growth and stormwater management, while supporting paved surfaces. Growing trees in urban areas can reduce the urban heat island effect, non-point-source pollution, and flooding, while replenishing oxygen and connecting us with the natural environment. The Silva Cell system achieves these benefits by creating a void space that holds ten cubic feet of soil per unit, protecting tree roots from compaction and providing room for stormwater infiltration and surrounding utilities. The 48" x 24" x 16" fiberglass and polypropylene cells (no recycled content) have galvanized steel supports and can be stacked up to three cells high and laterally as wide as necessary, to provide additional space, before the decking is attached. Silva Cell meets the American Association of State Highway and Transportation H-20 standards for highway loading, so the system can be used under most paved surfaces, from parking lots to plazas and streetscapes. The system is used primarily with new trees and may require root barrier installation.
Mobile Solar Power manufactures a range of portable solar-powered generators that integrate PV panels, inverters, charge controllers, and lead-acid storage batteries into a self-contained trailer that keeps all components other than the PV modules fully protected and out of the elements. Used as a silent, more environmentally responsible replacement for portable diesel generators, these units are available in multiple models with maximum energy storage ranging from 9.3 to 45 kWh (390 to 1880 amp-hours) and daily power production up to 18.7 kWh, with rated output of 9.5—90 amps. Most models use Outback inverters and Suntech monocrystalline PV modules, with options to upgrade to higher-power-density Sanyo modules and larger battery banks. Smaller models have 24-volt, flooded lead-acid batteries made by Trojan, while larger models have IBE batteries. Trailer units are made by Wells Cargo. The MS 100 Series generators have single axles rated at 2,200 pounds; MS 200 models have single axles rated at 3,850 pounds, and MS 300 models have tandem axles rated at 3,500 pounds each. Convenient inputs are provided for AC power and conventional gasoline or diesel generators. When a backup generator is needed (in the case of extended low sun periods or higher-than-planned energy draw), it can be operated at full power with maximum efficiency to recharge batteries, then shut off, rather than running it throughout the day.