Everhot
Everhot (Therma-Flow, Inc.) is a fourth-generation family-owned manufacturer of water heating and heat transfer products, including oil-fired heaters, indirect water heaters, tankless coils, and propylene glycol fluids, sold wholesale to plumbing and heating distributors across the Northeast US.
- Company typePrivate
- Founded1958
- HeadquartersWatertown, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Everhot does
Everhot, the trade name of Therma-Flow, Inc., is a fourth-generation family-owned manufacturer of water heating and heat transfer products headquartered in Watertown, Massachusetts. Founded in 1958 by Jabran Kurker in Boston and now led by his grandson Michael Hill, the company produces oil-fired water heaters (Center Flue and Rear Flue, 30-70 gallon glass-lined configurations), indirect water heaters featuring the proprietary Mega Coil, external tankless water heaters with solid copper shell construction (4 to 125 GPM), internal tankless coils listed by boiler manufacturer for compatibility, hot water storage booster tanks, anti-surge steam separators, and a proprietary inhibited propylene glycol fluid rated for freeze protection to -60°F. Additional offerings include brazed plate units, marine heat exchangers, and duct coils for HVAC integration. Underlying technology centers on copper-based heat exchangers, glass-lined steel tank construction with cobalt porcelain enamel, 2-inch high-density closed-cell foam insulation (R-Value 14), and proprietary chemical formulations for thermal transfer and corrosion prevention.
The company operates a wholesale distribution model, selling exclusively through plumbing and heating wholesalers in the Northeast United States, supported by direct phone and email sales contact plus factory engineering consultation for product selection and custom sizing. Pricing is quote-based and not publicly disclosed, with revenue mechanics tied to hardware unit sales across residential, commercial, and industrial use cases including hydronic heating, radiant heat, steam heating, swimming pool heating, and high-rise buildings. Customer segments span wholesale distributors (primary channel), residential end users (secondary), and commercial/industrial users such as restaurants, laundries, and schools with high-volume instantaneous hot water demands. Marketing is limited to a product catalog website, warranty registration tools, and direct sales outreach, with no public funding rounds, acquisitions, or geographic expansion outside the Northeast documented in the source data.
Everhot firmographics
Firmographics- Name
- Everhot
- Legal name
- Therma-Flow, Inc.
- Website
- https://tfi-everhot.com
- Company type
- Private
- Founded year
- 1958
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Everhot (Therma-Flow, Inc.) is a fourth-generation family-owned manufacturer of water heating and heat transfer products, including oil-fired heaters, indirect water heaters, tankless coils, and propylene glycol fluids, sold wholesale to plumbing and heating distributors across the Northeast US.
- Ownership category
- akta.pro rank
Everhot industry classification
Industry- Product category
- Water Heating Equipment
- NAICS
- Power Boiler and Heat Exchanger Manufacturing (332410), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)
- SIC
- Heating Equipment, Except Electric & Warm Air Furnaces (3433), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)
- akta.pro primary industry
- Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC)
- akta.pro secondary industries
- Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC), Heat Transfer Fluids (IMAEAMAG), Boilers, Furnaces & Process Heating Equipment (IMAHAKAD)
Keywords
Where Everhot is headquartered
LocationHeadquarters
- HQ city
- Watertown
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Everhot business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Water Heating Equipment Sales: Manufacture and sale of water heating equipment including oil-fired water heaters, tankless coils, indirect water heaters, heat exchangers, storage tanks, and related components. Products are sold through plumbing and heating wholesale distribution channels.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | No public pricing available - quote-based distribution model |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels2 records
Everhot product offering
Product offeringCore offering
Everhot/Therma-Flow Inc. manufactures and sells water heating and heat transfer equipment, including oil-fired water heaters, glass-lined storage tanks, indirect water heaters, external and internal tankless water heaters and coils, brazed plate units, marine heat exchangers, duct coils, anti-surge steam separators, and inhibited propylene glycol heat transfer fluid. Products are sold exclusively through plumbing and heating wholesale distributors serving residential, commercial, and industrial hot water and hydronic heating applications in the Northeast United States.
Product overview
Everhot (Therma-Flow Inc.) is a manufacturer of water heating and heat transfer products founded in 1958, offering the most extensive hot water product line in the Northeast. The portfolio includes Oil-Fired Water Heaters (Center Flue and Rear Flue glass-lined models ranging from 30-70 gallons), Hot Water Storage Booster Tanks (glass-lined), AquaPlus Indirect Water Heaters with Mega Coil (glass-lined tanks with oversized coils for boiler integration), External Tankless Water Heaters (solid copper shell, 4-125 GPM capacities), Internal Tankless Coils, Anti-Surge Steam Separators (Model AS-7), and Everhot Propylene Glycol Fluid (freeze protection to -60 degrees F). Additional products include Brazed Plate Units, Marine Heat Exchangers, Duct Coils, and Storage Tanks. The company serves plumbing and heating wholesalers in the residential, commercial, and industrial markets.
Differentiator
Problem solved
Functional benefit
Brands
- Everhot Propylene Glycol Fluid: Inhibited propylene glycol fluid designed to protect water-based heating or cooling systems and closed-loop piping systems against freeze damage and internal corrosion.
- AquaPlus (AP) with Mega Coil
Products and services
- Glass Lined Oil-Fired Water Heaters Dependable, highly efficient oil-fired water heaters available in Center Flue (30 and 50 gallon) and Rear Flue (30, 50 and 70 gallon) models, compliant with DOE requirements and featuring brass nipple connections, glass-lined steel tanks, and high-density foam insulation. Designed for residential and commercial hot water supply.
- Hot Water Storage Booster Tanks (Glass Lined)
- AquaPlus Indirect Water Heater with Mega Coil
- External Tankless Water Heaters (Solid Copper Shell)
- Internal Tankless Coils
- Anti-Surge Steam Separator (Model AS-7)
- Everhot Propylene Glycol Fluid
- Brazed Plate Units
- Marine Heat Exchangers
- Duct Coils
Companies that use Everhot
Customer profileSegments3 records
Ideal customer profiles2 records
Everhot technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Everhot partnerships and signals
Strategic signalScale indicators2 records
Recent moves6 records
Expansion highlights3 records
Everhot competitors and assessment
Company assessmentBroad incumbents
- Weil-McLain: Weil-McLain is a long-established US hydronic boiler manufacturer whose products integrate with tankless coils and indirect water heaters - the same installation architecture Everhot's products are designed for.
- A. O. Smith Corporation: A. O. Smith is a global, scaled manufacturer of residential and commercial water heaters and boilers. It competes across many of the same categories as Everhot (oil-fired, tankless, indirect) but at far greater scale and breadth.
- Burnham Holdings: Burnham Holdings (parent of Burnham, Crown, and US Boiler) makes hydronic boilers and indirect water heaters with strong Northeast dealer presence, overlapping directly with Everhot's boiler-integrated indirect and tankless coil lines.
- Rheem Manufacturing: Rheem manufactures residential and commercial water heaters (gas, electric, tankless, heat pump) and sells through wholesale distribution, overlapping significantly with Everhot's wholesale-channel go-to-market and product categories.
Direct peers
- Bradford White Corporation: Bradford White is a US manufacturer of residential and commercial water heaters, including gas, electric, oil-fired, and indirect models with strong Northeast dealer and wholesaler distribution - directly comparable to Everhot's core water-heating business.
- Bosch Thermotechnology: Bosch produces tankless water heaters, indirect water heaters, and heat pump water heaters sold through wholesale distribution, overlapping with Everhot's external tankless and AquaPlus indirect offerings.
- Navien: Navien manufactures condensing tankless water heaters and combi-boilers distributed through US plumbing wholesalers, competing in the same on-demand and high-efficiency water heating categories as Everhot.
- Rinnai America: Rinnai is a leading manufacturer of tankless water heaters in the US, sold through plumbing and heating wholesalers - directly comparable to Everhot's external tankless water heater category.
- HTP (Heat Transfer Products): HTP manufactures high-efficiency boilers, indirect water heaters, and stainless-steel heat exchangers sold through plumbing and heating wholesalers - a closely comparable specialty manufacturer serving similar contractors.
Emerging players
- Superior Boiler Works: Superior Boiler is a US manufacturer of commercial and industrial boilers and heat exchange equipment; partial overlap with Everhot's commercial/industrial external tankless and brazed plate units in the institutional market.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights5 records
Customer concentration
Everhot social profiles
Digital presenceEverhot financial estimates
Financial estimateRevenue estimate
Valuation estimate
Everhot leadership team
Management profileNumber of profiles
Profiles1 record
Everhot funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Everhot M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Everhot
What does Everhot do?
Everhot/Therma-Flow Inc. manufactures and sells water heating and heat transfer equipment, including oil-fired water heaters, glass-lined storage tanks, indirect water heaters, external and internal tankless water heaters and coils, brazed plate units, marine heat exchangers, duct coils, anti-surge steam separators, and inhibited propylene glycol heat transfer fluid. Products are sold exclusively through plumbing and heating wholesale distributors serving residential, commercial, and industrial hot water and hydronic heating applications in the Northeast United States.
Is Everhot a public or private company?
Everhot is a private company. It is classified as family owned and is currently operating.
When was Everhot founded?
Everhot was founded in 1958. It employs 11 to 50 people.
Where is Everhot based?
Everhot is headquartered in Watertown, United States, in the North America region.
How does Everhot make money?
One revenue line is on record: water Heating Equipment Sales.
Who are Everhot's main competitors?
Broad incumbents on record are Weil-McLain, A. O. Smith Corporation, Burnham Holdings and Rheem Manufacturing. Direct peers are Bradford White Corporation, Bosch Thermotechnology, Navien, Rinnai America and HTP (Heat Transfer Products). Superior Boiler Works is listed as an emerging player.
Does Everhot have an API?
No public API is recorded for Everhot.
What industry is Everhot in?
Everhot's product category is Water Heating Equipment. Its primary akta.pro industry code is IMAHAKAC, Heat Exchangers & Thermal Transfer Equipment, with a secondary code of IMAHAEAC, Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers). Its NAICS code is 332410 and its SIC code is 3433.