The push for energy conservation over these last couple of decades has resulted in houses being built tighter and more resistant to infiltration from outside air. but one solution has created a problem to another, having such adequate tight homes did not allow homes to get enough fresh air. but a whole house ventilation system helps bring fresh air from the outside,in. A basic ventilation system can relatively be inexpensive if the house has a forced-air furnace. while whole house ventilation may not be as glamorous as selling a stylish kitchen and bathroom upgrades it can go a lot further to ensuring you a long term comfort.