278 Bitcoin Acceptance Points Found in Washington State, Including Heated Hot Tubs from Miners

In the U.S. state of Washington, 278 retail outlets and businesses have been registered in the BTC Map directory as accepting Bitcoin (BTC) payments. The selection was published by Bitcoin Magazine on November 10, 2026. It includes cafes, restaurants, shops, beauty salons, car repair shops, and other small businesses.

According to the publication's calculations, the entries cover 94 localities in the state. Most of the establishments are located in Seattle – 46. Among the most unusual participants on the list is Snorkel, a company that manufactures wooden hot tubs and has developed a water heating system using the heat from Bitcoin mining equipment.

How the Mining-Heated Hot Tub Works

Snorkel has been producing cedar wood hot tubs since 1979. Initially, the company specialized in models with wood-burning stoves that allow water heating without electricity. Later, the manufacturer expanded its range with electric and other heating systems.

In 2025, the company's owner, Michael Diederich, began accepting Bitcoin as payment for hot tubs after a bet with his brother. According to the entrepreneur, some customers were interested in the possibility of using Bitcoin miners for water heating. As a result, Snorkel, in collaboration with Hashrate House, developed the HashTub system.

The device is based on the principle of heat reuse. ASIC miners perform calculations for the Bitcoin network and emit a significant amount of thermal energy during operation. Instead of dissipating this heat into the environment, a special system transfers it to the hot tub water.

The demonstration prototype used two Antminer S19j Pro miners. According to Bitcoin Magazine, the developers managed to heat the water to 40 °C in less than four hours. However, detailed test conditions, including the initial temperature and volume of water, are not disclosed in the publication.

The Project Received an Award in Denver

HashTub was presented at the Heatpunk Summit 2026, held on February 27–28 in Denver. The development by Snorkel and Hashrate House received the Heatpunk Innovation Award for utilizing heat generated by cryptocurrency mining equipment.

The demonstration setup is located at The Space educational center in Denver. The manufacturer also offers commercial versions of HashTub. On the official website, the cost of the mining heating system starts at $4,395 without the hot tub itself, and the full demonstration setup is priced at $24,930.

According to Diederich, combining mining with water heating can improve the economics of operating electric hot tubs. However, ASIC equipment continues to consume electricity, and the income from BTC mining depends on market conditions and mining difficulty.

Therefore, using miner heat does not guarantee cost reduction in every situation. The economic result must be calculated considering the cost of equipment, electricity, maintenance, and actual mining revenues.

Where Else in Washington Accepts Bitcoin

In addition to specialized technology companies, the Bitcoin Magazine selection includes regular service and food industry businesses.

One example is The Rose Gifts & Coffee in Renton. The store was opened by Katie Newman in October 2020. Initially, the main focus of the business was gifts and local products, but over time, coffee sales became a significant part of the company's activities.

Another participant in the selection is Overcast Coffee in Seattle. The business, founded by Jonathan Pak, started in June 2020 with a small coffee stand on Capitol Hill. Subsequently, the company opened a second location, and it organized coffee and ingredient supplies mainly through local producers.

Both businesses are listed in the BTC Map directory as accepting Bitcoin. However, payment methods may change, so the presence of a listing does not guarantee the availability of BTC payments at any given time.

What the BTC Map Directory Shows

BTC Map is a community project where participants add and verify information about businesses accepting Bitcoin. It features retail outlets from various countries, including companies using payments via the Lightning Network.

As of the end of October 2026, the global BTC Map database contained 27,330 entries about sellers. However, the information is updated by the community, so some entries may contain outdated information.

The selection from Washington state demonstrates the diversity of ways Bitcoin is used in small businesses – from regular purchase payments to combining mining with useful heat utilization. However, the published data does not allow for an assessment of the actual volume of BTC payments or conclusions about the spread of cryptocurrency among state residents.