Ruskin is a manufacturer of innovative air control products, including manual, fire, smoke, combination fire/smoke, and industrial dampers, louvers, air measuring stations, sound attenuators, diffusers, and Energy Recovery Ventilators.

Russell is a manufacturer of a complete line of energy-efficient unit coolers, condensing units, condensers, air handlers, coils and packaged systems.

Ruud provides heating, cooling and water heating products for residential and light commercial use. Their HVAC systems include Air Conditioners, Heat Pumps, Gas Furnaces, Air Handlers, Energy Star, HVAC Systems.

S&P USA Ventilation Systems, LLC is a producer of air movement products, ventilation systems and fans. They also provide Air Movement Products, Intake and Exhaust Systems, Ventilation Products, Fans and Blowers, Residential Ventilation, Commercial Ventilation, Bathroom Fans, and Inline Duct Fans.

Sales ​​Engineers Inc. is a manufacturers' representative selling to the heating, plumbing and specialty refrigeration markets. Their emphasis is on distributor oriented business with a contractor/dealer focus. They represent the following manufacturers: Purolator, Broan-Nutone, Gastite, Nortek Global HVAC, First Company, Lenox, Hilmor, Shurtape, and Thermaflex.

Sanhua is a manufacturer of HVAC&R controls and components, with a global presence and over 30 years of experience. Working together with the largest companies in the automotive, appliance, and HVAC&R sectors,

SAWIN Service Automation, Inc. is a provider of turn-key business solutions designed specifically for the service and installation industry since 1984. They provide a wide range of HVAC solutions, including heating and cooling, refrigeration, plumbing, security alarms and building automation systems.

SCP Ltd. is a globally renowned manufacturer of hot surface igniters for HVAC for over 25 years, offering silicon carbide and silicon nitride solutions for gas furnaces, boilers, and heaters.

A worldwide manufacturer, master distributor and exporter of high quality, innovative products designed for the Heating, Ventilation, Air Conditioning, Refrigeration and Appliance parts industries.

Since 1935, Sealmaster bearings are the industry's preferred bearing product, known for its premium-quality mounted ball-bearing line, as well as its mounted roller bearings.

Selco Products Co. is a renowned manufacturer of disc thermostats, bulb and capillary thermostats, NTC thermistors, and electronic temperature controls. They also provide custom manufactured assemblies, such as brackets, epoxy over molding, specialty connectors and more.

Sensor Electronics Corp. is a renowned provider of digital gas detection systems that monitor combustible gas, toxic gas, and oxygen deficiency. They also manufacture toxic and explosive gas detectors, along with gas analyzers with over 75+ gas sensors.

Seresco Technologies Inc. is a renowned US-based manufacturer of highest quality, technologically advanced and energy efficient dehumidifiers.

Shamrock HVAC Services Top-Notch AC Installation Services in Maryland. They specialize in all phases of the Residential and Commercial HVAC industry plus complete maintenance, Repair & installation services. They also offer expert heating services in Dayton, MD, and AC repair services in Dayton system installation and service for residential and commercial customers in the Dayton area.

Sherwood Products, Inc. is the manufacturer of the Stat-Gard, a locking thermostat cover in three different sizes. The guard is made of polycarbonate, a space age high impact plastic, the same material NFL football helmets are made of. In addition, the unit is tamper resistant and self-locking.

Shook Mfg. Products Inc. specializes in fasteners and tools for over fifty years now. They provide products with high-quality design, performance and usability. Their range of products include tools & hardware for the HVAC/R, roofing, and many other home improvement industries.

Shop Data Systems, Inc. CAD/CAM advanced industrial nesting software has been servicing the metal fabrication industry since 1975. They offer a myriad of CAD/CAM industrial nesting software modules that service general fabrication, product manufacturing, HVAC duct-work fabrication, blowpipe contractors and structural steel plate processors.

Shortridge Instruments Inc. is a renowned US-based manufacturer of AirData Multimeters, FlowHoods, HydroData Multimeters, Air Balance Instruments and Water Balance Meters.

Sid Harvey's is a multi-disciplinary distributor company with a network of 76 branches. They handle multiple renowned brands. This company remanufactures HVAC products as well.

Siemens provides quality standard products ranging from valves and actuators to sensors and thermostats. Energy efficiency, easy handling and long lifecycles are among the essential features of every single one of their products. And open communication standards like KNX and BACnet enhance compatibility and easily allow for seamless integration into building automation and control systems.

Sika USA Inc. is a renowned manufacturer of flow switches and flow meters. The company emphasizes on reliability and innovative design in small, low cost instruments for chillers and heat pumps. They also provide flow measurement instruments, electronic measuring and mechanical measuring instruments.

Skil – aire, division of Tithe Corp is a wholly-owned subsidiary of Baltimore, Maryland based Tithe Corporation, an environmental control and air conditioning products and services company that delivers integrated product technologies for cooling and enthalpy control solutions.

Smart Electric has been focused on HVACR components for over a decade. They provide HVAC systems' components, smart electric motors, capacitors and transformers for air conditioning, refrigeration equipment, valves, filters, heating and other appliances.

Smart Family of Cooling Products is the U.S.-based manufacturer of advanced industrial HVAC and process cooling systems, specializing in custom-engineered air- and water-cooled chillers, explosion-proof HVAC units, and rugged, high-performance equipment built to withstand the harshest environments.

Smart Service is a US-based provider of HVAC software solutions for a wide range of applications. Smart Service adds scheduling, dispatching, and more to QuickBooks, helping companies streamline their operations and eliminate waste.

SoftDEL is a technology company which provides engineering services for building automation, industrial automation, HVAC, smart lighting, oil and energy, and automotive domains.

Solatube International, Inc. has revolutionized the way daylight is brought into a building. Known as a tubular daylighting device (TDD), their products are a compact and leak-proof alternative to traditional skylights, virtually eliminating glare and minimizing solar heat gain. Solatube tubular daylighting systems are modular and can be installed in hard-to-reach spaces and rooms, skirting obstacles where skylights can’t reach.

Southern HVAC provides Air Conditioning, Heating, Electrical, and Plumbing repair and maintenance services throughout Florida, Georgia, South Carolina, North Carolina, Texas, Kansas, and Missouri. Its ongoing objective is to continue growing and expanding to new markets. Comprising a set of distinct service brands, Southern HVAC Corp. is a provider of essential maintenance, repair, replacement, and new installation services.

Spunstrand Inc. is a renowned manufacturer of fiberglass reinforced plastic ductwork for underslab HVAC applications, and industrial duct products such as dampers, carbon scrubbers, mist/grease eliminators, and FRP tanks.

Steril-Aire, ISO Certified in both 9001:2015 & 14001:2015, launched UVC for the HVAC industry in 1994. Steril-Aire is globally renowned in the development of high-performance UVC solutions for air and surface decontamination.