I just had to return a Model 700 because I have an attic hvac unit that is horizontal. We live in the desert in St. George, UT and have a 1,450 sf house that is 8 years old. What unit would you recommend for our horizontal attic unit?
Thank you for your email regarding your interest in our Aprilaire humidifiers. The only model that will not work on a horizontal heating system is the model 700. The humidity level is reduced by 50%. We wold recommend the mode 600 for your application.
Thank you for giving us the opportunity to be of service