Compact Design
Electrical Box
Titanium Condenser Coil
Stainless Steel Frame Base
ABS Insulated Pan
Quiet
Turbo Blower
Universal Board
Reverse Cycle Heating
Control and Cable Included
Choose your size
| BTU | Voltage | Model | |
|---|---|---|---|
| 6,000 | 230V | CT-6H | View |
| 10,000 | 230V | CT-10H | View |
| 12,000 | 230V | CT-12H | View |
| 16,000 | 230V | CT-16H | View |
| 25,000 | 230V | CT-25H | This page |
CTM CT-25H – 25000 BTU Marine Air Conditioner – 230V – 50/60HZ – Turbo Blower
CTM’s 25,000 BTU marine air conditioner provides powerful, quiet, and efficient cooling. 230V. Titanium circulating coils, stainless steel bolts, and stainless steel structural pan with ABS tray ensure long-lasting, corrosion-proof performance in even the toughest of marine environments. 3-Year Warranty when registered*. Patent number.: US 12,030,610 B2.
The quiet, powerful, and efficient CTM is a great option for new installs but also works as the perfect drop-in replacement for all major marine A/C brands including Dometic, Webasto, Cruisair, Marine Air, and Mermaid Air. The CTM is fully compatible with all Dometic, Cruisair, Marine Air, and Micro Air controls/thermostats and cables, making replacement of those systems a breeze.
CTM has taken nearly a decade of experience as a top-selling marine A/C retailer in the US, and combining this with an understanding of the wants and needs of marine A/C customers — as well as where other major brands could be improved — CTM has created a self-contained marine air conditioner that raises the bar on quality and performance.
And while lightweight and with a small footprint, the CTM CT includes titanium circulating coils, a high-velocity rotatable turbo blower (rotates less than 250 degrees), stainless steel bolts, and a stainless steel structural pan with Plastic ABS tray in order to ensure long-lasting, corrosion-proof performance in even the toughest of marine environments.
All CTM Control Boards, Temperature Sensors, and cables are made in the United States under strict quality standards. Every CTM Unit comes with a 3-year warranty when registered*, knowledgeable and attentive customer service, and ships ground to you free of charge within the US.
As marine A/C retailers, as well as boaters ourselves, we know what boaters are looking for in a marine A/C system — and this is exactly what the CTM line delivers
CTM CT Unit vs Dometic DTG and Webasto FCF Platinum
Specifications:
- Capacity
- 25,000 BTU
- Voltage
- 208-230 V
- Cycle
- 50-60 Hz
- Refrigerant Type
- R410A
- Starting Amps
- 24 A
- Current Consumption Cool / Heat
- 8.5 A / 9.6 A
- Locked Rotor Amps
- 50 A
- Fuse Max. / Min.
- 30 A / 18 A
- Blower Airflow
- 558 CFM
- Blower Speed
- 1420 RPM
- High Velocity Blower
- Yes
- Min. Supply Duct Size
- 5.5 in Square / 7 inches duct
- Seawater Inlet Connection
- 5/8″ / 16 (in/mm)
- Suggested Water Flow
- 550 GPH
- Net Weight
- 87 lbs / 39.4 kg
Features of the CTM CT-25H
Compact Design- Perfect drop-in replacement for all major marine A/C Brands. It’s compact design makes it the perfect unit for small spaces.
- Electrical Box
- Rugged electrical box with fire retardant cover.
- Titanium Condenser Coil
- The most corrosion-resistant material available for seawater cooling coils. 40% more resistant than copper, titanium coils guarantee top cooling performance and a rust-free environment.
- Stainless Steel Frame Base
- Corrosion-resistant stainless steel frame base will not rust or fall apart. Long-lasting and made to withstand the harsh marine environment.
- ABS Insulated Pan
- ABS is a versatile thermoplastic product that combines several compounds to offer a durable and corrosion-free material. This insulated pan is designed and made to last for years.
- Quiet
- Very quiet yet powerful marine air conditioning unit, making it a great option for powerboats and sailboats.
- Turbo Blower
- High-velocity rotatable turbo blower that will cool or hear faster. Blower rotates less than 250 degrees.
- Universal Board
- Next generation control board is compatible with most controllers in the market, such as OEM Brands like Dometic, Cruisair, and Marine Air. Also supports the TSEP Temperature sensor. Made in USA.
- Reverse Cycle Heating
- Enjoy powerful cooling from your CT Unit with the option of heating if needed. Thanks to reverse cycle, you can switch to heating when temperatures get low.
- Control and Cable Included
- The CT units now come with the Elite II Control and 10ft 8-pin cable included. Since May 1 2026
Dimensions:
- A – Width
- 22.83 in / 580 mm
- B – Drain Pan Width
- 13.5 in / 343 mm
- C – Height
- 15.82 in / 402 mm
- D – Width
- 15 in / 380 mm
- E – Min. Duct Diameter
- 7 inch
Universal Control Board Layout
Compatible with Most Thermostats
 |
 |
 |
 |
| Smart Touch / Easy Touch | CTM Elite II | Passport I/O | SMXir |
Because the CTM unit comes with the Universal Control board, it should work with the controller you currently have. Supported controllers include the SMXir, Passport I/O, Smart Touch, and Elite II. However, there are some older versions of the SMXir and Passport i/o controllers that don’t have the firmware to work with the new universal board. A newer version of the SMXir or the Passport i/o.
NEW 2026 CTM Unboxing & Installation Tutorial |CTM) Marine Self-Contained A/C
Warranty
The warranty period of registered CTM products is (3) three years, being the first year parts and labor, the second & third year parts only. For unregistered CTM products (1) one year, being the first 6 months parts and labor, and the last 6 months parts only. The warranty period of CTM products begins from the date of purchase (if purchased through a dealer or distributor), when installed (if installed by an authorized CTM dealer) and/or at the time of possession of the vessel by the owner (for OEM installations). However, the warranty period shall not exceed (3) three years from the original manufacture date. CTM products include a serial number which is date-coded, in order to determine the manufacturer date of the product, you may contact CTM’s customer service to obtain the original date.
In the event there is an extended period of time between the date a CTM product is manufactured and the moment that the product goes into service, CTM will require proof of purchase. For unregistered products, a proof of purchase will be required as well.
For more detailed information please download the Manual and refer to page 17.
Technical Specifications
| Weight | 87.00 lbs |
|---|---|
| Dimensions (L × W × H) | 22.83 × 22.83 × 15.82 in |
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