See it at Amerec: AK14
Amerec's own page for the AK14. Not a paid link.
AK14 vs MX4R
Amerec AK14 and Mr. Steam MX4R, compared on the figures their makers publish. Both are steam generators, and the room sizes their makers state, before each maker's own sizing rule, overlap.
The makers' figures side by side
| Specification | Amerec AK14 | Mr. Steam MX4R |
|---|---|---|
| Heater output | Watts: 14000 (240 V); 13580 (208 V) | kW: 20 |
| Room size the maker rates it for | Steam Room Cu Ft: Min 350, Max 550 | Room Volume (cu. ft.): 483-678 |
| Voltage | 240 and 208 volt models can be wired in the field for 1 or 3 phase power. | 2401 after model number denotes a 240V/1PH generator; B1 after model number denotes a 208V/1PH generator; Other voltage and phase combinations available upon request |
| Breaker / current | 240 V: 1 Phase Amps 21 & 38, Breaker 30 & 50; 3 Phase Amps 34, Breaker 50. 208 V: 1 Phase Amps 24 & 42, Breaker 30 & 50; 3 Phase Amps 38, Breaker 50 | Amps 240/1PH: 84; Wire Size AWG: 3 |
| Dimensions | 16-1/2" x 6-1/4" x 15" | 27.625" x 20.75" x 7.875" |
| Weight | — | Shipping Weight: 67 lbs. |
| Water and drain connections | Water Inlet – 3/8” NPT; Pressure Relief Valve – 3/4” NPT; Steam Outlet – 1/2” NPT; Drain Outlet – 3/4” NPT | Steam Pipe (3/4" NPT) Safety Valve (3/4" NPT) Drain (1" NPT) Steam Head (3/4" NPT) Water Supply (3/8" NPT) |
| Control included | 1 Control Required, additional may be connected. Compatible with the K2, K3, KT3, K4 controls. | Required Equipment: iSteamX, TempoTouch, TempoFlex, iTempo, Control. |
| Drain and flush | Amerec’s ADK auto drain option is highly recommended to automatically drain and flush the generator after every steam bath; If you do not buy the auto drain, your tank will need to be flushed monthly, or more often, depending on local water conditions | Optional Equipment: ChromaSteam, MS Wallseat, AutoFlush, Drip Pan |
| Safety listing | ETL Listed for USA and Canada | US and Canadian UL listed, and CE and NOM certified |
| Warranty | Limited Lifetime Warranty; all component parts for five years from the date of installation | Limited lifetime steam generator parts warranty |
| Price on the maker's site | $4,210 (steam builder on amerec.com, 29 Sep 2026) | $7,275 (List Price, Mr. Steam 2025 price book on docs.mrsteam.com, read 29 Sep 2026) |
Each figure is the maker's own, as cited row by row on the AK14 and MX4R pages and listed in the sources below. A dash means the figure is not on the maker pages we cite. Each maker states its own sizing rule, if any; read it on the product page.
Where to buy
See it at Mr. Steam: MX4R
Mr. Steam's own page for the MX4R. Not a paid link.
Where the published figures differ
- Heater output: AK14: Watts: 14000 (240 V); 13580 (208 V). MX4R: kW: 20.
- Room size the maker rates it for: AK14: Steam Room Cu Ft: Min 350, Max 550. MX4R: Room Volume (cu. ft.): 483-678.
- Voltage: AK14: 240 and 208 volt models can be wired in the field for 1 or 3 phase power. MX4R: 2401 after model number denotes a 240V/1PH generator; B1 after model number denotes a 208V/1PH generator; Other voltage and phase combinations available upon request.
- Breaker / current: AK14: 240 V: 1 Phase Amps 21 & 38, Breaker 30 & 50; 3 Phase Amps 34, Breaker 50. 208 V: 1 Phase Amps 24 & 42, Breaker 30 & 50; 3 Phase Amps 38, Breaker 50. MX4R: Amps 240/1PH: 84; Wire Size AWG: 3.
- Dimensions: AK14: 16-1/2" x 6-1/4" x 15". MX4R: 27.625" x 20.75" x 7.875".
- Water and drain connections: AK14: Water Inlet – 3/8” NPT; Pressure Relief Valve – 3/4” NPT; Steam Outlet – 1/2” NPT; Drain Outlet – 3/4” NPT. MX4R: Steam Pipe (3/4" NPT) Safety Valve (3/4" NPT) Drain (1" NPT) Steam Head (3/4" NPT) Water Supply (3/8" NPT).
- Control included: AK14: 1 Control Required, additional may be connected. Compatible with the K2, K3, KT3, K4 controls. MX4R: Required Equipment: iSteamX, TempoTouch, TempoFlex, iTempo, Control.
- Drain and flush: AK14: Amerec’s ADK auto drain option is highly recommended to automatically drain and flush the generator after every steam bath; If you do not buy the auto drain, your tank will need to be flushed monthly, or more often, depending on local water conditions. MX4R: Optional Equipment: ChromaSteam, MS Wallseat, AutoFlush, Drip Pan.
- Safety listing: AK14: ETL Listed for USA and Canada. MX4R: US and Canadian UL listed, and CE and NOM certified.
- Warranty: AK14: Limited Lifetime Warranty; all component parts for five years from the date of installation. MX4R: Limited lifetime steam generator parts warranty.
- Price on the maker's site: AK14: $4,210 (steam builder on amerec.com, 29 Sep 2026). MX4R: $7,275 (List Price, Mr. Steam 2025 price book on docs.mrsteam.com, read 29 Sep 2026).
Figures we cite for only one of the two: weight (only Mr. Steam's cited pages give it). Ask the other maker before treating the two as equal on those points.
Read each one in full
Amerec AK14
Amerec · steam generator · 14 kW · rated by the maker for 350–550 cu ft
Mr. Steam MX4R
Mr. Steam · steam generator · 20 kW · rated by the maker for 483–678 cu ft
Sources
- Amerec: steam builder — Amerec
- Amerec: warranty — Amerec
- Amerec: Amerec AK Steam Generator with K2 and K3 (PDF) — Amerec
- Amerec: residential steam bath generator 100 — Amerec
- Amerec: faq — Amerec
- Mr. Steam: TS0080 MX4R 6R (PDF) — Mr. Steam
- Mr. Steam: PRICEBOOK (PDF) — Mr. Steam
- Mr. Steam: generators — Mr. Steam