About Cala Systems
Cala designs and assembles a heat-pump water heater for homeowners. Sensors and software learn a home's hot-water use, then choose when and how fast to heat.
MassCEC says Cala launched in September 2025 and now operates a 25,000-square-foot Wilmington factory. Cala has shipped hundreds of units and trained more than 150 contractors across 46 states.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Oct 13, 2026 | Oct 27, 2026 | $2,550,000of $3.0M target | 4 | $637K | Debt, OptionsRule 506(b) | Form D ↗ |
| May 21, 2025 | Jun 3, 2025amended Feb 19, 2026 | $8,050,960of $10.9M target | 41 | $196K | EquityRule 506(b) | Form D/A ↗1 earlier filing |
| Oct 10, 2024 | Oct 25, 2024 | $1,900,000of $2.0M target | 13 | $146K | OptionsRule 506(b) | Form D ↗ |
| Dec 26, 2023 | Jan 10, 2024 | $5,261,165of $5.4M target | 50 | $105K | EquityRule 506(b) | Form D ↗ |
| Oct 4, 2022 | Oct 19, 2022 | $550,000of $1.0M target | 11 | $50,000 | Debt, OptionsRule 506(b) | Form D ↗ |
| Dec 7, 2020 | Dec 21, 2020amended Apr 12, 2022 | $772,500of $1.3M target | 22 | $35,114 | Debt, OptionsRule 506(b) | Form D/A ↗1 earlier filing |
| Total, six offerings | $19,084,625 | |||||
First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.
What the SEC Filings Show
- David Wilson first appears as a director on the Form D that Cala Systems filed on October 25, 2024. [12]Form D filings that name David Wilson (4):
- Cala Systems, director: Oct 25, 2024 · Jun 3, 2025 · Feb 19, 2026 (amended) · Oct 27, 2026
- Thomas Ferguson first appears as a director on the Form D that Cala Systems filed on October 25, 2024. [12]
- Seed I began taking money on December 26, 2023, about 7.4 months before the announcement. The Form D filed on January 10, 2024 shows $5.3 million sold of a $5.5 million offering, from 50 investors, or about $105.2 thousand each. [13]
- Michael Ting first appears as a director on the Form D that Cala Systems filed on January 10, 2024. [13]Form D filings that name Michael Ting (5):
- Cala Systems, VP Hardware & Cofounder, director: Jan 10, 2024 · Oct 25, 2024 · Jun 3, 2025 · Feb 19, 2026 (amended) · Oct 27, 2026
- Hilary Flynn is listed as a director only on the Form D that Cala Systems filed on January 10, 2024. [13]
Who Invested in Cala Systems
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| Announced | Round | Amount | Lead | Other investors | On the Form D | Source |
|---|---|---|---|---|---|---|
| Aug 6, 2024 | Seed I | $5.6M | Massachusetts Clean Energy Center; Clean Energy Venture Group | Burnt Island Ventures, CapeVista Capital, Leap Forward Ventures, Collaborative Fund, Climate Capital | First sale Dec 26, 2023; $5,261,165 of $5,461,165 from 50 investors. [13] | [7][6][5] |
Announced amounts can differ from Form D figures: an announcement can combine several closings, and some money is raised without a Form D.
Why Investors Backed Cala Systems
MassCEC cites U.S. Department of Energy figures showing water heating uses nearly 20% of the average home's energy. Conventional heaters mostly react after tank temperature falls and do not plan around household demand, solar output, or variable rates. Burnt Island Ventures backed Cala because it designed around heat-pump technology instead of adapting an older electric heater. [5][1][6]
Origin and Team
Michael Rigney and Mike Ting founded Cala. Rigney brings 20 years of leadership experience in climate and energy startups. He worked at utility enterprise software company EnergySavvy, grid infrastructure hardware company Gridco Systems, and demand-response company EnerNOC. EnergySavvy later became part of Uplight. EnerNOC went public in 2007. Enel X acquired EnerNOC in 2017. Earlier, Rigney co-founded BlueTarp Financial, which served tens of thousands of professional contractors. He holds an MBA from Stanford and an engineering degree from Dartmouth focused on heat transfer and fluid dynamics. [3]
Ting has more than a decade of consumer-hardware development experience. He began as an engineer in Bose's headphone group. He later held technical management and product roles on SharkNinja's Ninja kitchen team. He holds a mechanical engineering degree from McGill. [3]
Burnt Island Ventures highlighted adviser Becky Scribner's 15 years at Nest and Honeywell. Cala's 2024 release said senior leaders and advisers had backgrounds at several companies, including Nike, Google, and Span. [6][7]
Product and Technology
Cala pairs sensors and hardware with patented predictive-control software first developed by the U.S. Department of Energy's National Renewable Energy Laboratory. The controls combine artificial intelligence with physics-based methods. [7]
Cala uses a built-in flow sensor to learn household demand and can add solar output or utility rates. An on-device algorithm decides how much water to heat, how fast, and when. Its variable-speed compressor favors efficiency at lower speeds and faster recovery at higher speeds. At lower speed, the compressor can be up to 20% more efficient than a fixed-speed unit. Two electric elements cover unexpected demand. A mixing valve blends hot and cold water, increasing usable supply by up to 50% at a safe delivery temperature. [2]
The heater has a 3.76 Uniform Energy Factor and a 78-gallon first-hour rating. Its warranty covers parts for 10 years. Labor coverage lasts up to three years when a Cala Pro Contractor installs the unit. Software updates arrive over the air. Cala supports every U.S. time-of-use electricity rate. [2]
The mobile app shows hot-water use and energy savings. Users can set priorities, request an immediate boost, or flag travel. The heater can coordinate with rooftop solar and preheat before a possible outage. [1][2]
Cala estimates annual savings of about $529 for a typical four-person family replacing an electric-resistance heater at the national average rate. Its New England estimate reaches about $954. Actual results depend on the home, electricity rates, and hot-water use. The existing heater also matters. [5]
Burnt Island Ventures says Cala's unit uses 15% to 45% less energy than existing heat-pump water heaters. [6]
Cala plans 50- and 80-gallon models plus more water-heating categories. Longer term, it plans to connect groups of heaters to utility demand-response and virtual power plant programs. [5]
By September 2026, Cala's deployed systems had logged more than 100 years of combined operation. Hot water reached its target temperature 99.7% of the time. Heat pumps supplied 93% of system heating. About one-third of units connected to rooftop solar, time-of-use rates, or both. [5]
Milestones
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| Date | What happened | Source | Coverage |
|---|---|---|---|
| Sep 24, 2026 | Cala had shipped hundreds of units across the country. | [5] | — |
| Sep 24, 2026 | The 25,000-square-foot Wilmington factory could produce more than 15,000 units annually. | [5] | — |
| Sep 24, 2026 | Cala had reached about $2 million in annual recurring revenue. | [5] | — |
| Sep 24, 2026 | Cala had raised more than $15 million. | [5] | — |
| Sep 24, 2026 | The Cala Pro Network had more than 150 trained contractors across 46 states. It was adding roughly 20 to 30 each month. | [5] | — |
| Sep 2025 | Cala launched its first product. | [5] | Wilmington Town Crier ↗ |
| Jun 2, 2025 | The mobile app was live in pilot homes. | [4] | — |
| Jun 2, 2025 | Early users had installed Cala units. | [4] | — |
| Jun 2, 2025 | Cala was testing product performance and reliability. | [4] | — |
| Jun 2, 2025 | Cala was validating each step of its Massachusetts assembly process. | [4] | — |
| Jun 2, 2025 | Cala was in the final phases of a four-part certification process. | [4] | — |
| Aug 6, 2024 | Burnt Island Ventures reported $3 million in signed letters of intent with installer partners before launch. | [6] | — |
| Aug 6, 2024 | Burnt Island Ventures said Cala's launch came two months ahead of schedule. | [6] | — |
Market
Tom Ferguson of Burnt Island Ventures estimates annual water-heater revenue at least $5 billion in the United States and $30 billion worldwide. He estimates A. O. Smith, Rheem, and Bradford White together hold 90% of the U.S. market. He expects Cala to face incumbents with scale and distribution advantages. [6]
Tom Ferguson of Burnt Island Ventures estimates 48% of U.S. water heaters use natural gas and 46% use electricity. He cites 26% heat-pump water-heater growth from 2021 to 2022 while other types declined. He estimates 50% to 100% growth in the following year and expects share above 35% by 2029. Ferguson attributes the shift partly to installation tax credits, federal efficiency rules, and state incentives. He expects Cala to benefit from that shift. He argues incumbents would need to redesign their products and production lines to match Cala. [6]
Cala estimates about 10 million water heaters sell in the United States each year. It views installed heaters as a potential network of flexible energy storage. [5]
We wrote this summary from public statements by Cala Systems and its investors. It is not investment advice.
Leadership Team
Executive officers and directors listed on Cala Systems's Form D filed Oct 27, 2026.
Earlier filings also listed Hilary Flynn (director, last listed Jan 2024).
Sources
- CompanyCala Systems home page · linked above ↑
- CompanyCala Systems product operation and specifications
- CompanyCala Systems founders and mission
- CompanyCala Systems production and delivery update, June 2, 2025
- InvestorMassCEC profile of Cala Systems, September 24, 2026
- InvestorBurnt Island Ventures investment rationale, August 6, 2024
- Company releaseCala Systems $5.6 million seed announcement, August 6, 2024
- CoverageWilmington Town Crier coverage of Cala's first anniversary · linked above ↑
- SECCala Systems Form D, filed 2026-10-27 · linked above ↑
- SECCala Systems Form D, filed 2025-06-03
- SECCala Systems Form D/A, filed 2026-02-19 · linked above ↑
- SECCala Systems Form D, filed 2024-10-25 · linked above ↑
- SECCala Systems Form D, filed 2024-01-10 · linked above ↑
- SECCala Systems Form D, filed 2022-10-19 · linked above ↑
- SECCala Systems Form D, filed 2020-12-21
- SECCala Systems Form D/A, filed 2022-04-12 · linked above ↑
- SECCala Systems, Inc. filing history