Dry Air Hydronic Heaters & Curing/Ground Thaw Systems
Contractors Materials Company and MMI of Kentucky are now stocking the DryAir temporary heating, drying, ground thaw, and curing systems. Originally designed to dehumidify grain silos, the main hydronic heating component of the DryAir system was found to be an excellent answer to problems created on cold and damp construction sites, as well as, for remediation work. Hydronic heaters, like the DryAir System, heat a liquid, environmental friendly glycol to approximately 180 degrees from a contained flame source within the main heating unit. That liquid is then transferred by pump through insulated supply hoses to heat exchangers placed within an enclosed area to be heated.
The heat exchangers are equipped with a radiator and a blower fan. As the blower fan circulates intake air over the heat exchanger’s radiator, the intake air becomes heated (and dehumidified). The glycol solution is then returned via a closed loop non-pressurized return hose to be reheated and circulated through the system. For every sixteen degrees that the heating units elevate interior temperature, humidity is cut in half! DRYAIR heating units come in a variety of BTU output sizes from 250,000 BTU’s to 1.2 million BTU units. The 250,000 BTU units are propane fired and require only 110 Volt electric power for their pumps and fan systems. The larger units are either fired with diesel fuel, propane, or natural gas. These units require both 220 and 110 Volt electric for their pump and fan motors respectively. The diesel fired units are used primarily for ground thaw and concrete curing and are self-contained with their own fuel tank and diesel fired generator. All units are mounted on either single or double axle trailers for portability. The temporary heating units can provide comfortable heat to enclosed structures from 9,000 SF up to 120,000 SF. The size of the unit is determined by the cubic volume of air to be heated, the efficiency of the building enclosure, the anticipated outside temperature, and the desired inside temperature and relative humidity. We have a calculator that will provide you with the required unit size, the estimated fuel usage and the respective cost of the fuel used.
Because the main DRYAIR heating unit is placed outside the structure to be heated, there is no odor, oxygen robbing combustion, condensation, carbon black, or chance of fire within the building as a result of DRYAIR heat! The heating unit is engineered much like that of your own home furnace and hot water heater. Equipped with all of the latest electronic systems and management equipment, the unit is extremely safe and reliable for stand alone, unattended operation. Besides its safe operation, especially when compared with the typical open flame temporary heaters, the DRYAIR heating units are extremely efficient. Typical fuel savings of 50% over conventional open flame heaters can be expected when using DRYAIR units for temporary heating. In ground thaw or winter curing applications, heated ground hoses replace the heat exchangers as the medium of heat exchange. Three-quarter inch ID curing/ground thaw hoses are supplied with heated glycol through a manifold that attaches to the main supply hose from the heating unit. The hoses are looped over the area to be thawed or cured and covered with polyethylene and insulated blankets.
Ground thaw units can thaw up to 12″ of frozen ground every 24 hours. The efficiency of the system depends on outside air temperature, the “on-center” distance of the hose loops, and the “R” value of hose poly/blanket cover. The liquid glycol is returned to the main heating system via a closed loop non-pressurized return hose to be reheated and circulated through the system. The smallest 250,000 BTU unit can thaw or cure up to 9,000 SF of surface area. The 900,000 BTU unit can thaw or cure up to 24,000 SF of surface area. Winter construction in the Mid-West never had it this good! Contact one of our representatives for a demo or calculation of your winter heating and/or ground thaw and curing needs. Keep the interior concrete and finishing crews productive by going uninterrupted with safe, dry, heat. Get a head start on that construction project by thawing the ground for footers and slabs. Don’t get behind in your “pour” schedule; cure your concrete with DRYAIR hydronic heated hoses!
Please visit www.dryair.us for more information