HOTSTART

What HOTSTART does

HOTSTART, Inc. (DBA: Hotstart Thermal Management) is a Spokane, Washington-based manufacturer of industrial thermal management systems for engines and standby equipment, founded in 1942 and operating globally with offices in the U.S., U.K., Germany, and Japan. Its core product portfolio spans engine heating technologies including thermosiphon (natural convection) heaters, HOTflow® forced-circulation pump-driven coolant heaters (CTM, CKM, CSM models), in-block immersion heaters, EVRHEAT Series 20 with integrated operator display, oil and battery heaters, industrial immersion heaters, and diesel-powered Auxiliary Power Units (APUs) for locomotive idle reduction. The most technically differentiated offering is an air-source heat pump system for 1MW+ standby generators, claimed to reduce engine heater energy draw by up to 75% and save up to 40,000 kWh per genset annually versus conventional electric resistance heaters.

The company sells primarily through direct enterprise field sales via its six regional offices, a global distributor network (with longstanding partners such as Fluitek in Chile for 17+ years), and OEM dealer channels including Cummins, Detroit Diesel, Generac, Kenworth, Kohler, MTU Onsite Energy (Rolls-Royce Power Systems), and Peterbilt. Pricing is quote-based and not publicly disclosed; the disclosed Asia Pacific terms are Net 60 with a 12-month warranty from shipment date. Supporting commercial assets include a 7-language website, a HOTflow Certified Technician training program that qualifies installers for utility rebate programs, an Engine Heater Sizing App, and case studies across power generation, railroad, marine, oil & gas, hazardous location, heavy machinery, truck & bus, and electric vehicle verticals. Customer examples include Dish Network, Norfolk Southern Railway, Indiana Rail Road, Rio Grande Pacific, Montana Rail Link, LOOP LLC (offshore Louisiana oil port), and Iwate Kaihatsu Railways (Japan). The company is privately held, ISO 9001:2015 certified in both U.S. and German entities, CSA C/US certified on key products, and employs 200+ people globally from a 142,000 sq ft Spokane manufacturing headquarters.

Name

HOTSTART

Legal name

HOTSTART, Inc.

Website

https://hotstart.com

Company type

Private

Founded year

1942

Operating status

Operating

Headcount range

101–250 employees

Short description

HOTSTART is a Spokane-based manufacturer of industrial thermal management solutions for engines and equipment, including coolant heaters, forced-circulation systems, heat pump genset heaters, and locomotive APUs, serving power generation, railroad, marine, oil & gas, and heavy machinery customers globally.

Ownership category

akta.pro rank

Product category

Industrial Engine Heating and Thermal Management Equipment

NAICS

Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Power Boiler and Heat Exchanger Manufacturing (33241), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Heating Equipment, Except Electric & Warm Air Furnaces (3433), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430), Refrigeration & Service Industry Machinery (3580), Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

akta.pro secondary industries

Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC), Boilers, Furnaces & Process Heating Equipment (IMAHAKAD), Automotive Coolant & Refrigerant Circuit Components (Pumps/Valves/Reservoirs/Expansion Devices) (IMACALAE), Commercial Vehicle Cooling, HVAC & Thermal Management Manufacturing (IMACABAN)

Keywords

• Engine heating systems
• Thermal management solutions
• Genset engine heaters
• Coolant circulation heaters
• Auxiliary power units

Headquarters

HQ city

Spokane

HQ country

United States

HQ region

North America

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Industrial Heating Equipment Sales: HOTSTART designs, manufactures, and sells thermal management systems including engine heaters, genset heaters, coolant heaters, oil heaters, battery heaters, and forced-circulation systems. Revenue is generated from the sale of heating units, accessories, and controls.
2. Replacement Parts & Accessories: Replacement parts (thermocords, heating elements, pumps) and accessories (controls, hoses, fittings) are sold through customer service, distributors, and OEM dealers. Customers can order by contacting HOTSTART directly or through local distributors.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels11 records

Core offering

HOTSTART designs, manufactures, and sells industrial thermal management systems for engines and equipment, including forced-circulation coolant heaters (HOTflow), thermosiphon heaters, in-block heaters, oil and battery heaters, an air-source heat pump genset heater, and locomotive auxiliary power units. Products are sold primarily to OEMs and operators across power generation, railroad, marine, hazardous-location, truck and bus, and heavy machinery markets.

Product overview

HOTSTART is a manufacturer of industrial thermal management solutions for engines and equipment. The product portfolio centers on engine heating systems including Energy Efficient Genset Heaters (air-source heat pumps), HOTflow® forced circulation heaters (CTM, CKM, CSM models), thermosiphon heaters, in-block heaters, EVRHEAT Series 20, oil heaters, battery heaters, industrial immersion heaters, and Auxiliary Power Units. Supporting products include TwinStat™ thermocords, heater sizing tools, and certified technician training programs. The company serves power generation, hazardous location, railroad, marine, machinery, and truck/bus markets globally.

Differentiator

Problem solved

Functional benefit

Brands

• HOTflow: Product line of forced circulation coolant engine heaters using pump-driven technology for efficient heating.
• EVRHEAT Series 20
• TwinStat

Products and services

• Energy Efficient Genset Heaters (Air-source heat pumps) Air-source heat pump technology for standby generators 1MW and larger that reduces engine heater energy draw by up to 75% versus conventional electric resistance heaters and saves up to 40,000 kWh annually per genset. Targets data centers, hospitals, universities, and other critical facilities with backup power.
• HOTflow® Forced Circulation Heaters Pump-driven forced circulation coolant heating systems (CTM, CKM, CSM models) that actively circulate heated coolant through the engine block, providing more efficient heating than thermosiphon systems and reducing energy costs by up to 35%.
• Thermosiphon Heaters Natural convection coolant heaters that use no pump (TPS, CB/CL, SB/SL, WL, EE series), relying on heated fluid rising to create circulation through the engine cooling system.
• In-Block Heaters Engine block heaters that mount directly into the water jacket of the engine, reducing engine wear due to cold starts by up to 50%. Compatible with most major heavy-duty truck engine brands and models.
• EVRHEAT Series 20 Advanced coolant engine heater with operator display and integrated controls, indicator lights showing heater operation and temperature status, and integrated pump for efficient coolant circulation. Designed for energy efficiency and reliability.
• Oil Heaters Engine oil and hydraulic fluid heaters that maintain optimal viscosity and temperature, preventing oil solidification during cold weather and enabling quick starts without costly idling.
• Battery Heaters Battery heating solutions for electric vehicles, heavy equipment, and critical applications that maintain battery temperature for optimal performance and longevity in cold environments.
• Industrial Immersion Heaters Direct immersion heaters for industrial applications including oil, gas, and marine markets, designed for placement in fluid tanks or pans.
• Auxiliary Power Unit (APU) Diesel-powered auxiliary power units for locomotive idle reduction, providing engine coolant and lubrication oil preheating without shore power dependency. Used by North American and Japanese railroads.
• TwinStat™ Thermocord Energy-efficient replacement heater cord with dual thermostats that monitor engine and ambient temperature, allowing the heater to run only when needed in the coldest weather. Compatible with most in-block heaters, including non-HOTSTART brands.

Quantifiable outcome

• Reduces engine heater energy draw by up to 75% on standby generators 1MW and larger through air-source heat pump technology
• +5 more outcomes

Named customers8 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Dish NetworkcoreGTM or Marketing Partner · 6 May 2026HOTSTART partnered with Ink the Story and Dish Network to demonstrate and promote energy efficient engine heating solutions for Dish Network's standby generator assets. The partnership showcases HOTSTART's heat pump technology as a sustainability initiative for critical facility backup power.
• Avista UtilitiescoreStrategic or Co-development Partner · 29 July 2025Levi Westra, Principal Energy Efficiency Engineer of Avista Utilities (Spokane, WA), authored a whitepaper detailing the energy efficiency achieved when integrating a HOTSTART heat pump into the existing engine heating infrastructure of a standby generator. This whitepaper serves as a technical validation of HOTSTART's energy efficient genset heater technology.
• IPU GroupcoreStrategic or Co-development Partner · 12 December 2018HOTSTART acquired the engine heating business from IPU Group in December 2018. This acquisition expanded HOTSTART's product portfolio and market presence in the engine heating sector. Previously, HOTSTART had opened a sales office in Siegburg, Germany (2009) before relocating to Cologne in 2018 alongside this acquisition.
• Rolls-Royce Power SystemsminorChannel Partner/ Reseller/ DistributorHOTSTART supplies heating solutions to Rolls-Royce Power Systems. Rolls-Royce Power Systems awarded HOTSTART a supplier recognition award for quality and reliability. HOTSTART heating products are used with Rolls-Royce MTU engines and power systems.

Scale indicators7 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Webasto: German global supplier of thermal management solutions, including engine preheaters, cabin heaters, and EV battery thermal systems, competing head-to-head with HOTSTART in engine/cabin preheating across automotive, commercial vehicle, and off-highway markets.
• Eberspächer: German automotive supplier with a major heater and engine preheating business (including the Espar product line), directly competing with HOTSTART's thermosiphon and forced-circulation coolant heaters in trucks, buses, and specialty vehicles.
• Phillips & Temro Industries: US-based manufacturer of engine preheaters (Zerostart brand), idle reduction systems, and cold-weather power solutions for trucks, locomotives, and oil & gas, directly overlapping HOTSTART's in-block heater and fleet heater product lines.
• Calix: Sweden-based supplier of engine heaters, cab heaters, and EV battery heaters for the European automotive and commercial vehicle aftermarket, comparable to HOTSTART in product type and customer base across trucks and passenger vehicles.

Broad incumbents

• Generac: Major US standby generator OEM and HOTSTART OEM channel partner, offering broader power generation equipment where HOTSTART's genset heaters are spec'd in as thermal management components.
• Cummins: Global engine and power generation OEM with deep commercial vehicle and industrial reach; HOTSTART products are spec'd into Cummins engines and gensets, making Cummins both a customer and a comparable broad-mobility thermal context.
• Kohler Power Systems: Standby generator and industrial engine OEM where HOTSTART heating solutions are spec'd in; comparable as a broader incumbent in the standby power ecosystem HOTSTART serves.
• Rolls-Royce Power Systems (MTU): Large engine and power systems manufacturer (MTU brand) and HOTSTART channel partner and supplier award recipient, comparable as a high-power engine/thermal management context for HOTSTART's largest genset applications.
• Volvo Penta: Global marine and industrial engine OEM with comparable thermal management and preheating needs across marine, power generation, and off-highway segments where HOTSTART competes.

Emerging players

• Stored Energy Systems (SENS): Specialty battery charger and thermal management supplier for industrial backup power and rail, intersecting with HOTSTART's EV battery heater and locomotive APU categories as electrification of backup power accelerates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/hotstartinc
• YouTubeyoutube.com/c/HOTSTARTInc
• Facebookfacebook.com/hotstartinc
• LinkedInlinkedin.com/company/250270

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about HOTSTART