Optimized for every application The requirements are not always identical: with appropriately designed product lines, we satisfy every wish. If room air conditions remain within a narrow comfort zone, we feel a sense of well-being. However, the climate in rooms is influenced by many factors and the requirements on these conditions can be very different, depending on the type of room or its use. A regular supply of fresh air is important. This job is satisfied by our Air Handling Units. Furthermore, these units also create and maintain a defined state of room air. While for some applications only an exchange of air is needed, for others the requirements increase with respect to temperature, humidity and purity of air. Modular units permit you to freely select components and functions and allow for flexible adaptation of details for various applications. Compact units are optimized to the application, delivered equipped with highly efficient heat recovery systems and ready for connection to integrated controls.

COMFORT COOLING Comfort is the number one issue in any building. PROCESS COOLING Customized process cooling solutions around your needs. ABOUT DUNHAM BUSH You can count on us for unsurpassed performance and reliability. CUSTOMER CARE CENTRE Project management services, certifications, & industrial links. DUNHAM-BUSH IS WORKING TO BE THE LEADING EDGE IN GREEN SOLUTIONS. Ice Thermal Storage Air Conditioning Systems Heat Recovery Air Conditioning Systems Geothermal Heat Pump Air Conditioning Systems CO2 / NH3 Cascade Refrigeration Systems Dunham Bush Launches New Hyperion Series: Model WCHX-A Water Cooled Horizontal Screw Chillers – HYPERION Series Dunham Bush Launches New Hyperion Series: Model WCHX-A Water Cooled… Dunham-Bush Participated in Mostra Convegno Expocomfort (MCE) 2016 at Fieramilano, Milan Italy Dunham-Bush Participated in Mostra Convegno Expocomfort (MCE) 2016 at Fieramilano,… Dunham Bush Launches New Air Handling Unit (AHU) – SCS3 Series

Dunham Bush Launches New Air Handling Unit (AHU) – SCS3… A Letter from Dunham-Bush CEO Working together for a better DB As we close the… Dunham Bush Launches New Hercules Series: Model DCLC-D Dunham Bush Launches New Hercules Series: Model DCLC-D High Efficiency… Dunham-Bush Participated in BIG 5 Exhibition 2015 Dubai Dunham-Bush Participated in BIG 5 Exhibition 2015 Dubai Dunham-Bush MENA… Packaged Air Handling Units DX Cooling only, 6 to 30 Tons with Puron® Refrigerant (R-410A) The Gemini® 40RU and 38AU series indoor air handlers and outdoor units provide a wide variety of options for your HVAC application needs. These units are designed for long dependable operation whether it’s a rooftop or on-the-ground installation. All Gemini® 38AU Condensing Units and 40RU Fan Coils use environmentally sound Puron® refrigerant. Together, they create a reliable split system that provides easy solutions to a wide range of commercial HVAC needs.

The 40RU series indoor air handler contains a chilled water coil and may be interfaced into chilled water systems. The 40RU series has a multi-position design that allows for vertical or horizontal installation with no modifications. Powerful fan systems allow easy adaptation to existing ductwork. For heating capability, the 40RU’s allow for field installed electric heaters, hot water coils, or steam coils.the best portable ac units An Ideal Solution for a Range of Applicationsportable versus window ac unitsThe HE Series make-up air units offer the most efficient method available to heat make-up air. hvac units for dummiesDirect fired make-up air heaters may be considered to be 100% efficient because no heat is vented to the atmosphere.

The theoretical 100% efficiency should be reduced to 92% due to water vapor being formed as a natural by-product of the combustion process. Units are available with heating capacities up to 14,000 MBH and air capacities up to 100,000 CFM. Units are also available in variable capacity, dual capacity, air curtain, and / or heat recovery configurations. HE SeriesDirect Fired Heaters 1,300 to 100,000 CFM Up to 25:1 turndown Indoor and outdoor configurations High Efficiency Green Burn Burners Learn More about GB Typical Options ( * ) represents standards features View Brochure Flash format Request Access to our Complete Catalog Due to continuous product development, specifications, dimensions and capacities are subject to change without notice. The RE Series mix air units offer the most efficient method available to heat mix air. Direct fired make up air heaters may be considered to be 100% efficient because no heat is vented to the atmosphere.

Units are available with heating capacities up to 11,000 MBH and air capacities up to 100,000 CFM. Units are also available in variable capacity, dual capacity, air curtain, and/or heat recovery configurations. RE SeriesDirect Fired Heaters Variable Outdoor Air Volume 1,600 to 100,000 CFM Indoor / Outdoor / Horizontal / Vertical THIS CLASS OF PRODUCT NOT PRESENTLY APPROVED FOR USE IN CANADAApplication of this product requires written approval from the appropriate chief provincial gas inspector.click on image to enlarge – click back arrow to return We received an enquiry from the representatives of a large well known bottling plant in Kent to see if we could overcome a problem that they had with an overheated  atmosphere on the factory floor. When the factory was originally sized for heating the area was calculated and a bank of gas fired heaters were installed in the roof to keep the area warm. No account was taken for the numerous electric motors in the plant, along with  the sterilisation equipment, label printing equipment, conveyor belts, etc, that were pumping heat into  the factory space and kept the plant warm enough without  the heating system being turned on. 

Whereas this produced  a power saving bonus through the winter the air temperature in the plant during the summer period was uncomfortable. We were called in to check the feasibility of  of removing the gas fired heat exchangers and fitting  chiller batteries into the space to blow chilled air into the plant. The plant had an artesian well with  a constant supply of water at 13 degrees centigrade that was available and could be pumped to the factory roof  level. We measured the available  fan motor C.F.M. and worked out the optimum water flow rate for best supply of chilled air through the air handling units. We reported our findings back to the company representatives along with our costings for supply and fit. Shortly afterwards we were awarded  an order to remove one of the gas air heater units and provide a chiller battery to fit in its place. We returned to the site to take final detailed measurements and draw up our method statement  to complete the job.

We liaised with the on site engineer with regard to the chilled water supply and left the site satisfied that we had all the necessary details to complete the project. The chiller battery was manufactured and an appointment was made to return to the plant and fit it. We arrived early and set about the fitting. We had agreed to dismantle and dispose of the old gas fired heat exchanger. Modifications were made to the air handling unit ducting entry and the chiller battery was quickly fitted. A stainless steel supply was laid on with the chilled water by the site engineers and they tig welded the supply to the chiller unit that we had fitted. The system was charged and tested with an immediate draught of cooled air being noted in the factory. Test equipment was fitted to the system to measure the efficiency and amount of cool air being pumped into the factory.  This testing is set to continue for several weeks and when the test equipment returns are proven, the remaining 19 units will be converted by us using the same method.