We must do our part now so that we have a country to pass on to our children and grandchildren. If you have poor ventilation, you will probably have an odor problem, as well as increasing the chance of your rabbits being susceptible to respiratory infections, such as pneumonia and pasteurellois. However most people use mechanical ventilation , exhaust fans are motor driven and are easily controlled. Using fans can be very expensive, but I feel they are well worth the money. No matter which type of ventilation you choose, remember that warm air rises, and that as air warms up, you increase its moisture-holding capacity.
Excessive moisture contributes to rapid breakdown of rabbit waste and can lead to ammonia build-up.
Ammonia build-up can be irritating to the eyes and nose, as well as making your rabbits subject to respiratory infections. The build-up of moisture also tends to increase the number of flies, and maggots in the rabbitry. Flies can be a nuisance to you and the rabbits. Proper cleaning on a regular basis will greatly reduce the fly population. The excessive moisture will also cause your cages to corrode and rust at a much faster pace.