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The most economical and comfort wise way to go in my opinion would be to go with a PTAC unit, comfort would exactly what you want and it is a fairly easy thing to do.

Its called Iron Grip and apply generoulsly it will shrink, depending on size of spiral dont cut the seams..the duct is under tension and the top and bottom of the cut will blow out, leave the seams...

Just a word of thought...I always change the plenum and transition to tie into the existing duct, it makes for a cleaner look and for professional.

how about this for a theory... whoever did the rough possibly left a piece of the duct out of the s-cleat and didnt realize until he was done and then closed it with a piece of foil tape? And your...

Ptac unit is the best and the most cost and effctive way of treating a bonus room... especially in the summer monthes, fairly innexpensive and will take care of all seasons.

Why not?....Dont you want to draw exactly the proper amount of air from each room based on cfm per room? You cant do that if you grossly oversize your return.Return air duct sizing is still based on...

Absolutely true, by restricting you will actually increase your airflow...duct sizing is based on fan curve and noise criteria, the fan will deliver a particular amount of air based on static...

I'm sorry, but that was definitely not installed by professionals! What is up with that funky return air drop, I've done alot of custom homes and cant understand why the return air coming out of the...

Yes, transitions are important and proper duct size is also important, proper fittings are crucial to a good duct sytem. Manual D as a matter in fact is in my face everyday I do duct layout. It will...

Give me a break, we keep going around in circles here, 90% of furnace problems are lack of properly sized duct systmes your furnace is what I can tell is oversized and undersized ductwork. The first...

Glendale,
Why didnt they just sit the unit on some heat pump risers which are also vibration isolators, being that there is a platform for the unit to sit on? In my opion units should sit on a...

Wideawake,
Not hurt, but aware of the differing climates to be conditioned! Would you size a room of the same size with a high latent load the same as a room with nothing but sensible load?...

Load calc, load calc, load calc, what a wonderfull way of desigining a system, based on what the space actually needs and is best for comfort. It shows you more than conditioning but troubleshooting...

Dx,
yes I buy all my boots from a wholesaler and then modify them on site because its cheaper to buy it than make it, its a simple fix and they make so many its stupid not to buy a prefab boot, it...

Speaking of all that lets say we do seal that small opening around the filter.. unless we seal the complete duct system including all blockers, sheeting, boots,plenum etc. air will leak anywhere. I...

Nine times out of ten you will see that, why? because now of days installs are done as quick and as simple as possible and done by unqualified people who dont know. Our boots are made with a simple...

So many variables too little information, too many issues could be at fault and discussing over the computer is too much for a homeowner...call contractor and have them solve the issue, if they are a...

Jrammuni,
In my opinion, Zoning in residential is to fix design flaws from previous contractors who did not advise homeowners about fluctuating temp differences.Zoning is usually installed...

Sounds like the system is undersized.. just ran into the exact situation, based on the numbers you gave and where the air handler is brought back memories. We did a load calc based on a builder...

Thanks guys, I appreciate the feedback about the system and you all know about installing something new to you...its a concern because you sell the job and install the job and expect everything to go...

Proposing to install a Arzel zonig system in an existing home and I've personally never installed one and was wondering if anybody had any opions good or bad about the system, I think its a good cost...

hey crash,
Why dont you do us all a favor and kiss all of our ass', you have no idea how competitive it is in out field and how many flyby nighters there are that are giving horrible service and...

sounds like you might have air entering the return air from the attic, 100 degree air entering the system will definitly change your discharge temp. System not designed to be drawing unlimited...

Why would you move the service disconnect from where it terminates 5 feet away when a LB and some conduit would have put the disconnect right near the service panel? I understand what someone was...

Thanks retired, thats the website I was talking about.