Diagnosis: Bigger HVAC equipment is not necessarily better. In fact, an over sized system will cycle on and off often, which results in a less comfortable home and higher energy bills. This often causes uneven temperatures in the home and, because the system turns off more quickly than it should, humidity is not properly removed from the home – on a hot summer day, feeling cool but damp in your home is not pleasant. Prescription: Insist that your contractor perform a Manual J calculation. This is the best method for him to most properly decide what is the best size of equipment necessary for your home. Among other things, The Manual J calculation takes into account such details as how many windows your home has and what direction they face. A Manual J type calculation is a requirement for any “Quality Installation Certification” | |  |
