Engineered Venting.
Delivered.
EXD is the exclusive manufacturer representative for commercial and industrial exhaust, high-temperature venting and mechanical draft. We specify with engineers. We supply mechanical contractors. We verify in the field. No field modifications. No change orders.
Same engineering team. New name.
EXD was formerly known as Enervex NorCal. We still represent the same manufacturer-backed exhaust, venting and mechanical draft lines across Northern California, with the same specifying engineers and field support team contractors have relied on for years.
Represented Manufacturers
Fragmentation is the failure mode.
General engineers cannot stay current on every code nuance for high-temperature venting, grease ducts and generator exhaust. Standard distributors do not understand draft control or thermal expansion. The result: systems that draw clean on a 2D drawing and fail the first inspection.
EXD closes that gap. We are the single technical authority that represents the product, runs the physics and validates the layout. One source from spec language to roof termination. No translation loss between the engineer's drawing and the contractor's punch list.
Application Precision
Boiler stacks, generator exhaust, kitchen grease duct. Engineered to the exact thermal and pressure load.
Supply Chain Reliability
Submittals, factory orders and logistics managed with transparent lead times contractors can schedule labor around.
Code Authority
NFPA 96, IMC, UL listings referenced from memory. AHJ-tested layouts.
Field Execution
Pre-install survey, install QC and commissioning sign-off. We do not hand over keys until it passes.
Projects engineered without compromise.
Exhaust, engineered end to end.
Not a contractor. Not a distributor. EXD assists consulting engineers with design and specification, supplies mechanical contractors with exact factory packages and verifies every install in the field.
All CapabilitiesAirflow
CFM, static pressure and draft analysis sized to the application.
Pressure
External static, balancing and commissioning verification.
Thermal
UL 1738 and UL 2221 stack design rated to 2000°F continuous.
Mechanical Draft
Demand-controlled, inline and upblast configurations.
Spec & Submittal
Stamped drawings and code-aligned cut sheets in five business days.
Field Verification
Pre-install survey, install QC and commissioning sign-off.
Two paths. Same documentation discipline.
For Specifying Engineers
Selection support, code references, stamp-ready submittals.
- Pressure drop analyses and sizing calculations
- NFPA 96, IMC and UL listing references on call
- Section 23 31 / 23 38 spec language you can paste
- Site walks alongside the design team
For Mechanical Contractors
Factory packages priced tight, scheduled, and field verified.
- Take-off review against the spec. No surprises.
- Single PO for the full exhaust scope
- Submittal turnaround in five business days
- Field verification before commissioning
01
Assessment
Site conditions, regulatory environment, budget and schedule defined before a line is drawn.
02
Design
Sizing, pressure drop and code alignment. Specs returned with manufacturer-neutral or basis-of-design language.
03
Submittal
Stamped drawings, cut sheets and BOM in five business days.
04
Verification
Pre-install survey, install QC and commissioning sign-off. We do not hand over keys until it passes.
The full exhaust scope under one roof.
Type I & II Kitchen Exhaust
NFPA 96 · 1,500°F
Grease Duct
UL 1978 · zero-clearance
Factory-Built Chimney
UL 103 · 1,000°F
High-Temp Stack
UL 1738 · 2,000°F
Lab & Fume Exhaust
FRP · 304 / 316L SS
Boiler & Generator Venting
Cat I–IV · positive pressure
Make-Up Air & Tempered MUA
65°F set point
Inline & Upblast Fans
Enervex EBC · RSV
Process Plant Ductwork
Welded · flanged
Acid & Corrosion-Resistant FRP
Derakane 411 / 470