plumbing, hydronics
Products & Supplies

Our Story


We have been in the HVAC/R industry for the past 50 years providing residential, commercial and industrial replacement parts, suppliers and technical support to the professional users.  

We are not a larger factory representative firm who's bread and butter is the plan and spec market.   SEI specializes in replacement and engineered items that are harder to specify and provide.

We know this industry so call, we can discuss,  clarify and provide or tell you where to get it.  We can save you time and money solving your HVAC/R requirements while your out doing what you do best, Out making money in the field. 

We provide to large service companies, companies with inhouse techs and manufactories that need items customized for the a job.  Give us a try, you will like the service. 

Some of our valued customers

Top it Off Barrel Storage
Formerly:  Napa Barrel Storage

  • Napa Barrel Care
  • Jessup Cellars
  • Rutherford Rentals
  • V-12 Winery
  • Crocker & Star
  • Ferrari Carano
  • Hillebrand
  • Copper Peak Logistic
  • Madorom Vineyards
  • Monterey Mushrooms
  • Premier Mushrooms
  • Petaluma Creamery
  • SC Warehouses
  • California Maritime Academy
  • California Fine Arts

Contact Us

Interested in something special, Call or Email

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Scientific Environments HVAC/R Providers

PO Box 10097, Napa, CA 94581, US

(707) 265-9000 Email :