Temperature Differential for Coleman Mach AC
Have a Coleman Mach 15000 BTU AC unit. Does anyone know what the temperature differential between return air and discharge air is? I know on cars and houses it should be about 20 degrees F. Thanks.
Forum Discussion
The following is a statement from Dometic concerning RV A/C
"The ability of the air conditioner to maintain the desired inside temperature depends on the heat gain of the RV.
Some preventative measures taken by the occupants of the RV can reduce the heat gain and improve the performance of the air conditioner.
During extremely high outdoor temperatures, the heat gain of the vehicle may be reduced by:
1. Parking the RV in a shaded area.
2. Using window shades (blinds and/or curtains).
3. Keeping windows and doors shut or minimizing usage.
4. Avoiding the use of heat producing appliances.
Operation on High Fan/Cooling mode will give optimum or maximum efficiency in high humidity or high outside temperatures.
Starting the air conditioner early in the morning and giving it a "head start" on the expected high outdoor ambient will greatly improve its ability to maintain the desired indoor"
Here is what RV Products has to say about evaluating Coleman-Mach A/C...LINK
Vent covers, windows, slide-outs, thin walls with only just so much insulation etc. ALL contribute to heat gain in an RV
15-20*F differential is the norm.
BUT remember that is not outside air temp to inside air temp
IT is the temp differential between return air (sucked from inside rig) to discharge air (blowing out of A/C duct)
Just how cool the inside of rig gets is dependent on that heat gain factor
temperature
"The ability of the air conditioner to maintain the desired inside temperature depends on the heat gain of the RV.
Some preventative measures taken by the occupants of the RV can reduce the heat gain and improve the performance of the air conditioner.
During extremely high outdoor temperatures, the heat gain of the vehicle may be reduced by:
1. Parking the RV in a shaded area.
2. Using window shades (blinds and/or curtains).
3. Keeping windows and doors shut or minimizing usage.
4. Avoiding the use of heat producing appliances.
Operation on High Fan/Cooling mode will give optimum or maximum efficiency in high humidity or high outside temperatures.
Starting the air conditioner early in the morning and giving it a "head start" on the expected high outdoor ambient will greatly improve its ability to maintain the desired indoor"
Here is what RV Products has to say about evaluating Coleman-Mach A/C...LINK
Vent covers, windows, slide-outs, thin walls with only just so much insulation etc. ALL contribute to heat gain in an RV
15-20*F differential is the norm.
BUT remember that is not outside air temp to inside air temp
IT is the temp differential between return air (sucked from inside rig) to discharge air (blowing out of A/C duct)
Just how cool the inside of rig gets is dependent on that heat gain factor
temperature
