L Seven N Ventilation and Mold Specialists

What They Do

MoldMold TestingFire and Smoke

• A/C system maintenance
• A/C system repair
• Ductless heating & A/C services
• HVAC duct & vent cleaning
• HVAC duct & vent installation
• HVAC duct & vent repair
• HVAC system maintenance
• Heating system installation
• Heating system maintenance
• Heating system repair
• Install AC
• Repair HVAC
• Ac Repair
• Ac Unit
• Air Conditioning
• Air Conditioning Repairs
• Air Duct Cleaning
• Blowing In
• Camera Duct Inspection
• Central Vacuum Cleaner Maintenance
• Central Vacuum Repair
• Chimney Sweeping
• Cleaning And Maintenance
• Cleaning Company
• Cleaning Specialists
• Cleanliness Of The Ventilation
• Commercial Air Duct Cleaning
• Commercial And Residential Cleaners

In Their Own Words

Welcome to L Seven N Company Inc, Ventilation Cleaning Specialists! L Seven N Company Inc, Ventilation Cleaning Specialists has been servicing the Santee area since 1986. We are HVAC contractors that specialize in maintenance for commercial and exhaust hoods, air ducts, mold, chimneys, dryer vents for residential and commercial locations, and much more. L Seven N Company Inc, Ventilation Cleaning Specialists is a family-owned company that is associated with the BBB, NADCA, and Blue Book. We do offer 10% off for residential work if you mention our website and free estimates for commercial projects. We have an excellent staff that is here to answer any questions you have, so give us a call today!

Written by the business on its public profile. We have not verified these claims.

Before You Call L Seven N Ventilation and Mold Specialists

1. Where do you think the moisture is coming from, and who fixes it?
2. Will you set up containment and negative air, and how will you protect the rest of the home?
3. Do you also do remediation? If so, who checks your work?
4. How many air samples will you take, and will you take an outdoor control sample?
5. How will you deal with smoke odor inside wall cavities and the HVAC ducts?

Ask for the company’s California contractor license number and look it up with the Contractors State License Board. Also ask for proof of insurance and industry certification for the technicians doing the drying or mold work.

They list no storefront. Ask where the business is based and whether the crew is their own.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• DIY with careSafe DIY Mold Cleanup for Areas Under 10 Square FeetA step by step method to clean up mold under 10 square feet safely, with the gear to buy, what to throw away, why bleach is not the default, and when to stop.
• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• Call a proThe First 48 Hours After a House FireWhat to do in the first two days after a house fire. Safe re-entry, utilities, insurance calls, securing the home, food, medicine and what never to clean.
• DIY with careAttic Mold on Roof Sheathing, Causes and FixesWhy mold grows on attic roof sheathing, how to find the cause, the fixes that stop it for good, and how to tell a cosmetic stain from a roof that needs work.