Mojave: Novel Liquid Desiccant Systems Company Raises $12.5 Million

By Amit Chowdhry ● Sep 20, 2023

Mojave Energy Systems recently announced a $12.5 million seed round of funding that will be used to launch its third-generation liquid desiccant air conditioning platform. This funding round was co-led by At One Ventures and Fifth Wall, with participation from Xerox Ventures and others. And the company spun out of the Palo Alto Research Center (PARC).

The novel Mojave product line cuts in half the energy required for providing buildings with fresh, cool, and dry outdoor air while using 20% less refrigerant than existing systems on the market.

Mojave utilizes a high-concentration salt solution to passively pull water from the air. And the cool, dry air is then delivered to the building and, notably, the water-saturated liquid desiccant is reused by “regenerating” it (i.e., water pulled out and returned to its useful high salinity state) using only waste heat from the system: this eliminates the need for external sources of heating or cooling.

This process achieves double the moisture removal efficiency compared to the traditional vapor compression approach, reducing the cost of operation for customers and helping them achieve Net Zero compliance with energy-efficient systems. And the Mojave DOAS can “drop-in” to existing HVAC infrastructure and requires minimal maintenance.

Along with financial benefits, Mojave’s DOAS can also improve indoor air quality. Mojave’s units independently control temperature and humidity, enabling users to select the ideal indoor air conditions. The biocidal properties of its liquid desiccant also purify the air from bacteria and viruses, further improving air quality.

Mojave is already running several field pilots and has its commercial launch in January 2024. And the company will utilize the new capital for go-to-market and commercialization rollout, manufacturing of initial orders, and continuing to invest in research and development.


“The way we cool buildings hasn’t changed much in over 100 years even though our buildings have. Today the story is about dehumidification, not cooling; in fact, we spend more energy dehumidifying air than we do cooling it. HVAC equipment improvements have focused on reducing the energy needed for things like heat pumps and fans, neither of which addresses dehumidification. Our first product, focused on providing cool, dry, fresh outdoor air, uses half the energy of other solutions and can reduce emissions by 100 million tons CO2e . It is especially helpful with buildings like schools, hospitals, and grocery stores, that have more demanding requirements.” 

— Philip Farese, Mojave’s founder and CEO

“In this technology we saw an opportunity to disrupt the $5B DOAS market as well as the broader markets encompassing cooling equipment, energy, and carbon that total over $600B and account for 10% of total global electricity and 4% of emissions. But commercial building owners and operators need to see product benefits immediately to move away from traditional inefficient solutions. We are excited about Mojave’s debut product because it offers massive energy savings, refrigerant reduction, drop-in installation, a quick payback, and $50,000 or more per unit in lifetime savings: it’s an easy business decision.”

— Dilip Goswami, Venture Partner, At One Ventures

“We are incredibly excited to support Philip and his entire team at Mojave as they continue to revolutionize the Dedicated Outdoor Air System market. Their next-gen products will bring even greater energy benefits to the broader HVAC market imminently.”

— Greg Smithies, Partner & Co-Head ClimateTech Investment at Fifth Wall

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