Making every effort to exceed your expectations

Welcome to SLTNS Engineered Systems®, a professional manufacturers’ representative specializing in high performance building technologies.  We proudly serve Maryland, Virginia, and Washington, D.C.

We specialize in technologies including stairwell pressurization systems, combustion & make-up air systems, clothes dryer exhaust systems, multistory exhaust systems, special gas vents, chimneys, engine exhaust, mechanical draft systems, draft controls, parking garage exhaust systems, and commercial kitchen exhaust.

Providing complete technical assistance and exceptional customer service, we strive to offer unrivaled access to the experience, knowledge and products of the leading manufacturers in the industry.

Serving Maryland, Virginia, and Washington, D.C., we strive to provide you and your client extraordinary service and unequalled performance on every project.

Engineered Systems & Products

Exhaust Systems

SLTNS Engineered Systems offers factory-built UL 2561 double-wall ceramic fiber insulated exhaust systems for internal combustion engines and turbines.

Exhaust Systems

LF Systems manufactures fully modulating, demand-based variable volume exhaust systems are suitable for multistory kitchen, bathroom, or clothes dryer exhausts. LF Systems also manufacturers exhaust shafts with integrated fire resistive enclosure assemblies with or without integrated low profile subducts.

Pressurization Systems

LF Systems is the industry leader in factory-built active compensated stairwell pressurization controllers, dampers, sensors, and VFDs.

Commercial Kitchen
Exhaust Systems

SLTNS Engineered Systems offers factory-built UL 1978 single- and double-wall grease ducts and UL 2221 “zero clearance” grease ducts with integrated fire resistive enclosure assemblies.

Gas Vents

SLTNS Engineered Systems offers the industry-leading UL 1738 single- and double-wall special gas vent with features such as tool-less installation and built-in pitch.


SLTNS Engineered Systems offers UL 103 and UL 2561 single- and double-wall pressure-rated chimneys for use with non-condensing heating appliances.

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    SLTNS Engineered Systems® is a manufacturers’ representative serving Maryland, Virginia and Washington, D.C.

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