Just got off the phone with my HVAC guy. His engineer suggested something that I thought of about a year ago. In fact I think I posted about it in the thread somewhere.
First of all they don't like the room air exchange idea. They are afraid it won't be enough of a temperature gradient. I am not so sure about that but anyway.......
They want to bring in outside air directly into the theater. The idea is to make an access point from my mechanical room right to the outside and attach a 6'' duct to it to bring in cold outside fresh air. The access point would have a metal grate and screen of some sort to keep critters out.
Then the 6'' duct would have an inline fan to force air into the theater. And also a damper to close it off when we don't want outside air.
Another damper would be installed at the takeoff. A thermostat would be installed inside the theater and when cool air is called for the damper at the main takeoff would close and the damper on the outside air duct would open and the inline fan would turn on.
I think someone had poo poo'd this idea awhile back but I don't remember why.
The engineer claims that he used to work in Denver and installed several such systems in home theaters with these kind of problems there. That would be a similar climate to ours here in KC.
They are coming by on Monday with the engineer to make sure it will work and give a final quote. He said "less than $1500". That sounds high to me and if it is not less than 1000 I may just do it myself. I would think the equipment to buy would be the following:
-Metal grate for outside with screen
-6'' duct. about 10ft
-6'' inline fan
-damper for outside air duct
-elbow to go from takeoff to existing duct with a damper
There is some labor involved with cutting through the concrete. I don't have the tools to do that and it makes me a bit nervous. Any ideas there? Hmm maybe it is better to let them do it but we will see. And ya know that equipment I just listed isn't free so that isn't just all labor costs.
Depending on the quote I would consider a DIY mini split but it looks like it would be close to 2K to do that and a heck of a lot of work bc of how hard it would be to get into my room and then finish it off again. I just don't think I can bring myself to do it unless it is a last resort.
(Tim thanks for the ERV lesson and I will mention it to them to see what they say just in case)
Alright so tell me why this is a terrible idea