If you really want to check your ducts for blockage, you can call local tool rental shops and see if they have a camera snake that plumbers use to check piping.
If the house is really old, it is possible that there is little or no insulation in the walls, some insulation companies can blow insulation into the wall cavities from outside, if its new enough to have sheetrock, this is probably not the case though.
I wouldn't recommend a duct booster, they just make noise, and most likely will not improve anything. Possibly if there is more than one register on a duct run those could be seperated somehow and get more air upstairs. Or as you mentioned earlier, zone the system.
You can't fix stupid
Thanks for all of the feedback and support. I'm at the point where I need to decide whether to add a second zone to my house or add booster fans. My A/C company indicated that the cost to install the duct fans would be about $300 for the parts with 2-3 hours of labor. That makes it about $800 per booster fan.
I don't know whats involved in changing to 2-zone but it sounds expensive.
Do in need a whole second furnace/A/C system by adding a second zone?
Thanks for the info.
I've never seen a booster fan work.. As CJ said too.
I'd check a rental place or get a duct cleaning company to run a camera down the duct to see if there blockage.. No point of spending the money on the booster fan that you later find out the duct is blocked/damaged.
Zone system can be very expensive..
Cold room - continued
I'm still at it. I am trying to fix a problem as directly as possible without introducing new issues. Two rooms in my house do not get as much airflow as I would like and I need to see if it can be righted. I have an HVAC person coming within the next week or so to see if dampers can be installed in a system that was not originally fitted with them. The basement is finished and I'm afraid that it will be difficult to do. The other option are booster fans but I've heard a lot of negatives (on this board too) and hope dampers will be an option. One question:
Do you need to damper every run to be successful? Can just the two problem rooms be installed or will that throw off the whole system?
Thanks to all the pros that offer their suggestions.
to get more airflow to those rooms you dampers in all the other runs, it is to force air to these two rooms. If dampers can be installed then they should be able to change the ductwork to those rooms too,(bigger, different takeoff location.) Have you been able to inspect how much insulation is in these rooms?
You can't fix stupid
I have checked the insualtion and it's the same as the other rooms. These two rooms are first and second off the main trunk and while I thought that would help, it was pointed out it would not because of the force of the air. The back of the house definitely is a few degrees warmer both up and down stairs.
We should know soon enough - a visit is planned in December for another HVAC specialist.
Its possible, but it wouldn't lose that much air that he would barely read air flow to that room.
Call the cleaning company and ask them if they found any dampers while cleaning your ducts. If not.
If you have access to all the supply runs, have dampers installed and the system balanced.
Not to sound cruel, but your babies room being 7* cooler in the winter, is less of a concern then it being 7* warmer in the summer.
We'll see if the access is sufficient. Of course, we had the basement refinished about a year to soon! We'll see.
It's probably more of a mental thing but the baby's room being colder weighs on my wife and I. The upstairs is also warmer in summer but I don't know how much warmer.
I guess the point of my last post was to determine if putting dampers on some runs is an option at all. Is it an all or nothing type of fix?
Thanks for your suggestions.
With the exception of those rooms not getting enough air, its usually all or nothing.
If you can get dampers in the rooms that heat up the quickest, it may get you enough air to the babies room to get it close enough to ease your mind.
I recomend to most people to use a drop ceiling when finnishing the basement. Never know when you need to access the duct work, or plumbing pipes.
Thats good news then. The basement is finished with a drop ceiling.
Hopefully, the access is easy enough and we can make some improvements - I much prefer dampers to booster fans which everyone seems to dislike.
I'll keep the information coming in the hope it might assist someone else in the same situation.
Easy solution, put a thermostatically controlled electric heater in the kids room. I would also have the tech remove the take offs for these 2 runs and see if there is any air coming out at that location on the duct. A lot of times moving a take off a foot one way or the other will make all the difference in the world. Just as important as having supply air to a bedroom is having return air in the room as well. If it is a babies room I suspect the door is closed the majority of the time. If there is no return present you will not get good heating in the room. If there is a return in the hallway close to this room you can probably undercut the door a little more to get some more return from the room. Installing returns upstairs after the fact is not an easy or cheap job.
"Go big or Go Home"