Dometic EnviroComfort ECD10K-HV AC Retrofit Kit - 10,000 BTU - 115VEnviroComfort ECD10K HV AC Retrofit Kit 10,000 BTU 115V The Dometic Marine Air 10,000 BTU EnviroComfort Air Conditioning Retrofit Kit provides reverse cycle cooling and heating capability so you stay comfortable onboard year round. This 10,000 BTU unit replaces an older self contained air conditioner of comparable capacity in the 8,000 to 11,000 BTU range. All units have high velocity blowers with internal motors for a more compact installation