“The more things change, the more things stay the same”
My hat is off to all those posts that feel ventilation is a significant deficiency.
In my past life (HVAC), V stood for ventilation. It is almost nonexistent today.
I used to recommend adding forced ventilation to most of the houses I inspected ( over 3500 ft.²). The client would agree and follow my recommendations and go down to the local supply Center, only to find that they no longer stock these items which now must be special ordered. Being a long time contractor customer of Lowe’s and personally knowing the local Home Depot manager I made some calls. They just don’t sell enough to keep them in stock! I have attic ventilators and whole house fans installed in every house I’ve ever owned. I can’t even get replacement parts without special ordering them any more.
For those of you who are studying or have taken building science courses, controlling ventilation is a critical area in building design. Just because “we don’t do that anymore around here”, does not mean you should change your way of thinking either. Being complacent because the builder doesn’t want to spend a few more dollars should not be your business practice. They quit putting weep holes in brick veneer siding around here for about five years. Now they’re going overboard and your house looks like Swiss cheese! So just because they don’t do it anymore, doesn’t mean you don’t have to do it at all. Someday it’s going to come back. For those of you that are seeing high-efficiency homes such as Energy Star homes being built in your area, this lack of ventilation will be catastrophic. When new technology is used in construction, the old standards of construction must be abandoned and modified to the new technology.
The following link is a calculator written by ASHRAE standards and will help you see the effects of ventilation:
[size=2]If you are interested in how many BTUs is being imposed on your HVAC system due to insufficient attic insulation try this link:
The new standard of construction in this area is to put the HVAC system in the attic to save floor space. Disregarding any ventilation increase to the attic needed to maintain HVAC system efficiency is resulting in inefficient equipment, loss of capacity, increase power consumption, and
reduced life expectancy of the equipment.
If you get tired of writing this up in your report, put it in your report template see you only have to say it once. In the event someone doesn’t write, just cut it out.
I did this with auxiliary drain pan float switches on HVAC equipment located in a finish space or above a finish ceiling (the attic). Builders were outraged and called the codes Department about me because I made such a big thing about putting a six dollar switch on the HVAC unit to protect thousands of dollars of ceilings below. Well, today it’s the law in this community! So don’t think your words are going unheeded. When people start yelling about you, it’s better than you doing the yelling!