Laboratory Fume Hood

How a Laboratory Fume Hood Works & How We Save You Time & Money

Here are the advantages of Excedr’s fume cupboard leasing program:

  • Leasing eliminates the upfront cost of buying equipment, enabling you to make payments over time
  • Payments may be 100% tax deductible*, yielding you significant cash-savings
  • It costs less to lease through our program than to purchase outright
  • Our comprehensive repair coverage minimizes your lab’s downtime
  • We handle and streamline the admin work associated with instrument procurement and maintenance
  • With the capital saved through our program, labs are better able to reinvest in their core business and operations (staffing, inventory, marketing/sales, etc.)

*Please consult your tax advisor to determine the full tax implications of leasing equipment.

We can procure most instrument types and can accommodate any brand preferences your lab might have. Contact us today and see how our leasing program can discount your MRA scanner price.

All equipment brands/models are available


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In many laboratory settings, scientists often work with materials that are dangerous to handle. Specifically, certain chemicals and substances give off hazardous fumes. Laboratory fume hoods are safety equipment meant to protect laboratory workers by limiting their exposure to possibly toxic vapors. This type of safety equipment is generally a ventilated enclosed or semi-enclosed workspace. Most have vapor-proof, see-through front covers or sash windows that sit in front of the ventilated workstation as well as some type of exhaust system to process the toxic fumes.

Regardless of what your work is, having proper safety equipment is always a good idea and in some cases a requirement. If you work with possibly toxic or volatile substances inhaling possibly harmful chemicals can lead to a litany of health issues. Chemical fume hoods offer your lab workers a ventilated area where they can work with vaporous materials and have the air around them be clean. All fume hoods do this by pulling air through the sash, over the work area, and either removes the air or filters it back into the room.

Duct vs Ductless Hoods & Air Volume

In situations where the workspace air cannot be recirculated back into the lab space, ducted fume hoods should be used. These enclosures are designed to move the conditioned air out of the workspace through a duct that expels the air outside of the building. This type of fume hood is considered the safest and easiest to use however it also needs to be installed into your buildings HVAC system.

Ductless fume hoods filter air and recirculate it back into the workspace which is why these are sometimes called recirculating fume hoods. Depending on the type of material you are planning to use inside the fume hood, specific filters will need to be used. Since they are unlike their ducted counterparts, these safety hoods are relatively smaller and can be mobile.

Constant Air Volume (CAV)
The amount of air that flows into your fume hood is extremely important. CAV hoods are designed to ensure that the total volume of air that flows through the fume hood remains constant. The two main types of these hoods are bypass and non-bypass. Bypass CAV hoods generally have an opening above the sash window to allow for constant airflow even when the sash is closed. Non-bypass CAV hoods, on the other hand, do not have this opening. Instead, they have strict instructions on how much the sash window can be closed and still maintain proper airflow.

Reduced Air Volume (RAV)
Similar in design and construct as CAV hoods, RAV hoods block off a portion of the bypass opening. This reduces the airflow which in turn reduces the device’s energy use. Due to the reduced airflow, RAV hoods do not provide as much protection as CAV hoods and should be used when working with less noxious compounds.

Variable Air Volume (VAV)
Unlike RAV and CAV, VAV hoods can achieve varying levels of air volume to flow. Some of the most common ways that VAVs change the air volume that comes into the hood are by using either dampers or blowers. Due to their complexity, VAV hoods are generally initially more expensive than their normal constant-volume counterparts. However, their energy-saving capabilities can make them more cost-effective in the long run.

History of the Fume Hood
Early scientists have been aware of the dangers of inhaling too many toxic fumes for a long time. Thomas Jefferson in the early 19th century created a ventilation system using a hearth, sand bath, and special flues to help vent out possibly toxic vapors. Thomas Edison expanded on the chimney design in what would be considered the first actual fume hood. The University at Leeds would eventually design a fume cupboard in 1923 that would more closely resemble a modern fume hood. Labconco would eventually begin production of commercially used fume hoods 11 years later. Fast-forward to today and fume hoods have evolved leaps and bounds. No longer relying on a fireplace to create sufficient ventilation, fume hoods continue to improve and evolve as our demands for them expand.

If you or your lab are looking to improve your safety equipment you should not have to compromise because of cost. Get in touch with one of our customer success representatives today and let us show you how one of our leases can help you afford the fume hood you need and also save money at the same time.

We Offer RAV Fume Hood Leases to Fit Every Need

Operating Lease

This off-balance sheet financing structure provides three options at the end of the term. The lessee has the option to return the equipment to the lessor, renew at a discounted rate, or purchase the instrument for the fair market value. Monthly payments are also 100% tax deductible which yields additional monetary savings.

Sale Leaseback

If you recently bought equipment, Excedr can offer you cash for your device and convert your purchase into a long-term rental. This is called a sale leaseback. If you’ve paid for equipment within the last ninety days, we can help you recoup your investment and allow you to make low monthly payments. This also frees up money in your budget rather than tying it down to a fixed asset.

Fume Hood Manufacturers & Models on the Market
  • Thermo Fisher & Applied Biosystems
  • Cole-Parmer
  • Eppendorf: MasterCycler
  • Bio-Rad
  • Agilent
  • Roche Life Science
  • Analytik Jena
  • and more!


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Effect on Credit & Operating Capital

Leasing/renting does not hinder your future borrowing ability and allows you to keep your business credit line open for expansions, staffing, and other operational expenses. Additionally, it strengthens the cash flow of your business and keeps cash reserves free for business development opportunities.

Used Equipment

Unlike traditional financing and leasing companies, the Excedr program can accommodate refurbished/reconditioned equipment in addition to demo units. If you are looking for additional cost-savings, we recommend considering this option.

Speed of Approval

Excedr’s program allows you to respond quickly as your need for equipment and technology arises. You can be approved with minimal documentation and have the equipment you need in operation and generating revenue for your business quickly.


Whether you’re looking to finance a liquid handler, or leaseback a real-time device, we can help. If you want to discuss your needs more thoroughly, call us at
+1(510) 982-6552 or fill out the contact form up above.