SKU: 85240595779

VARON 1-10 L/min Home Oxygen Concentrator Serene 3

Sale price$224.55 Regular price$249.50
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Description

VARON 1-10 L/min Home Oxygen Concentrator Serene 3Serene 3 Highlights 1 10 Adjustable Continuous Flow Up To 93%3% Oxygen Concentration 2 in 1 Oxygen Therapy and Nebulizer Therapy 24H 7D Continuous Operation Easy To Use 48dB Universal wheels for easy transport Easy to operate Description: 1 10L Adjustable Continuous Flow Experience customizable oxygen therapy with a flow rate adjustable from 1 to 10 L min. At 1 3 L min, it delivers up to 933% oxygen concentration, ensuring optimal respiratory support.

Serene 3 Highlights
✔️1-10 Adjustable Continuous Flow
✔️Up To 93%±3% Oxygen Concentration
✔️2-in-1 Oxygen Therapy and Nebulizer Therapy
✔️24H/7D Continuous Operation

✔️Easy To Use
✔️≤48dB
✔️Universal wheels for easy transport
✔️Easy to operate

Description:

1-10L Adjustable Continuous Flow
Experience customizable oxygen therapy with a flow rate adjustable from 1 to 10 L/min. At 1-3 L/min, it delivers up to 93±3% oxygen concentration, ensuring optimal respiratory support. Replaceable primary and secondary filters maintain long-term purity, making this ideal for elderly individuals, pregnant women, busy office workers, and stressed students.

User-Friendly & Convenient
Set the automatic shut-off timer anywhere from 10 minutes to 40 hours. Monitor key metrics like operating pressure, oxygen concentration, timing, and accumulated runtime on the clear LCD display.
The universal wheels allow for easy transport from room to room, making it convenient to move around your home or office.

Dual Functionality: Oxygen & Nebulizer Therapy
Maximize value with a single device offering two essential therapies: oxygen and  nebulizer. The humidifier bottle provides smooth, comfortable oxygen delivery, while the integrated nebulizer port turns medication into a fine mist for easy inhalation.
(Note: Nebulizer therapy should be used at 1 L/min flow, and both functions cannot be used simultaneously.)

Silent & Stable Operation
Enjoy up to 72 hours of continuous use with a high-performance, oil-free compressor. The machine operates quietly (≤48dB), ensuring a peaceful environment for uninterrupted rest or work.

Smart Alerts & Easy Maintenance
Stay informed with real-time alerts for power failures and low/high pressure. Built-in overload protection automatically cuts off power if the current exceeds the rated limit. After troubleshooting, simply press the reset button to restart the device.

Specifications:
Power Supply: AC 230V/50Hz or AC 110V/60Hz
Power: 280 VA
Oxygen Flow:1-10 L/min
Oxygen Concentration: 93% ±3% (1-3 L/min), or up to 80%±3% (4-10 L/min)
Oxygen Supply Mode: Continuous
Noise: ≤48dB
Oxygen Concentrator Size: 45*34*25cm / 17.7*13.4*9.8in
Oxygen Concentrator Weight: 11.8kg / 26lbs
Package Size: 38*30*61.5cm / 15*11.8*24.2in
Package Weight: 13.4kg / 29.5lbs

Package Includes:
Oxygen Concentrator with AC Power Cord *1
Humidifier Bottle with Tube *1
Nasal Cannulas *2
Nebulizer Set *1
Replacement Primary Filter *1
Quick Operation Manual *1
Detailed User Manual *1

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SKU: 85240595779

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A
Verified Purchase
Al
Pawtucket, US
★★★★★ 5
Clear, Practical Guide for Entry-Level to Intermediate Multifamily Underwriting
Format: Kindle
As someone learning multifamily underwriting from the ground up, this book was incredibly helpful. It breaks down complex underwriting concepts into a logical, step-by-step process that actually mirrors how deals are analyzed in the real world. What I appreciated most is that the author doesn’t just show formulas — he explains why assumptions matter, where risk hides, and how underwriting decisions affect outcomes. The sections on operating expenses, stabilization, financing, and sponsor economics were especially valuable and gave me a much clearer framework for analyzing multifamily properties with confidence. This book feels less like theory and more like a practical guide you can follow alongside a real underwriting model. I’d highly recommend it to anyone getting started in multifamily underwriting or looking to tighten up their analysis process.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 20, 2025
D
Verified Purchase
Derick am owe I
Bozeman, US
★★★★★ 5
Underwriting Multifamily
Format: Kindle
This book deserve a five star rating. It uses practical examples easy to follow. This well written book easy to understand. I recommend this book to any real estate investor.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 20, 2024
N
Verified Purchase
Nathan Roberts
Draper, US
★★★★★ 5
Must Have Book for Investors or Sponsors/GPs wanting to Invest in Multifamily Properties!
Format: Paperback
If you understand the math and numbers associated with investing in real estate, this book will help you underwrite any multifamily property. Not only does Robert's book discuss how to gather the information needed for underwriting, he goes into detail on how sponsors can manipulate the numbers. This is a great book for knowledge on the pros and cons of varied partnership structures and how each can create an alignment of interest between limited partners (LPs) and general partners (GPs). Overall, this is a great easy read book.
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Reviewed in the United States on September 13, 2020
M
Verified Purchase
MF Student
Birmingham, US
★★★★★ 4
Basic knowledge of underwriting is necessary to understand.
Format: Paperback
This is a great guide for underwriting multifamily deals for someone with some basic to moderate knowledge of underwriting. I am a new student to this field and have to stop and google some of the acronyms. For a future version, I think adding an extra page for the acronyms used, definition and equation would be helpful. I think that the font could be larger and darker. Adding mathematical formulas in the book would provide visualization as well. Rob can also provide a sample OM for the reader to use with his underwriting model and compare to his completed one. Again, I am a newbie so my review may change as I gain knowledge in this area. I enjoyed listening to Rob on Youtube/Podcast and hope to learn more from him.
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Reviewed in the United States on July 27, 2020
K
Verified Purchase
K. Okumura
Cuba, US
★★★★★ 5
Easy to understand and well organized
Format: Paperback
Author makes complex concepts feel approachable and easy to comprehend. The content is sufficient to be an introductory course
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Reviewed in the United States on October 22, 2025

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