If used appropriately, this could help reduce condensation and disperse excess heat in your home.

Installing a ventilation system is an effective way of reducing condensation in your home. It can also help make your home more efficient if the heater you already have installed is capable of heating more than just the room it is in. For example, if your fireplace throws out enough heat to leave your living room sweltering hot, then you could use a ventilation system to move hot air from your living room into other rooms. You could then turn off any inefficient secondary heaters you may have running in those other rooms and thus save energy.

Ventilation systems should only be used for the purpose of heat transfer if you already have an over-sized primary heater (like the fireplace) installed and you often use inefficient secondary heaters to heat other parts of your home. If you do not use secondary heaters often, then installing a ventilation system will mean you’ll raise your average home temperature but end up having higher energy bills overall.

Try this first 

Condensation control ventilation systems replace moist air inside the home with drier air from outside the home to prevent condensation and subsequent problems like mould, mildew and timber rot. For this purpose, ventilation systems can be very effective. But they’re also an expensive solution to a problem that can often be solved by cheaper means.

Condensation occurs when moist air comes into contact with cool surfaces, such as windows. To avoid condensation, the easiest first step is to minimise the moisture in your home air: use an extractor fan when you shower, dry clothes outside instead of in a dryer and use an extractor fan whilst cooking to absorb steam. You can also try improving your home’s insulation so your room temperatures don’t get down to dew point as often.  

You should open a window in every room in the house for a short time every day to let moisture out.