My house is 4200 sq.ft. My installer installed a EZ072 split heat
pump. 3 zones. We have had problems from the start. My total Duct
leakage Corrected to 25Pa is 536 CFM's. This is after he corrected
my problems? My supply is 14'' round. Return is 9x16 . The unit
never stops at 30F or above 85F. We have been in our new home 1
year. I've had another Waterfurnace dealer, do a blower door test,
and two load cal.
which said we needed a 4.1 ton at 1940 cfm. Waterfurnace has been no
help. The State inspectors can't get our problem fixed.
Need to get a lawyer on this. The duct is grossly undersized for your
system. You have a six ton unit, a 14" round is good for about a 2.5 ton
system max. The return isn't big enough for even a 2 ton for our installs.
Now, if you failed to mention that each of the three zones have 14" round
then that's ok, IF they never shut down. Do you have controlled zones or
just three zones that supply air all the time and each is 14"
If the total supply is one 14" duct and your only getting 536 CFM's; then
there are tons of elbows, improper take offs, too small registers.
In other words, you need a lawyer. You may also need a certified engineer
for a written statement. What took place was in my opinion a crime.
BTW, Water Furnace doesn't care any more than any other manufacture. They
got their money and they will say that the unit will perform as specified if
installed correctly. Yours ain't.........
He has 14'' round coming out of the air handler, At about 3 feet, one
zone breaks left about 10 feet to a damper, 10 more feet its reduced
down to 10'' for about 35 ft. One other 14'' breaks right to another
damper, and then reduced to 10'', these two zones supplies 3300 sq.
ft. At about 6 feet one 14'' goes about 90 feet upstairs to another
damper upstairs, it also reduces to 10'' to supply 900 sq.ft. He told
the inspector that he had the high speed set on 1850 cfm's on the
Intellizone. Does this make anymore sense? or no sense at all?
He stated one 14 inch coming off, then branching out of a tee to another 14"
which reduced immediately to a 10" with a zone damper. All three zones are
I would bet the installer had to bleed off a lot of gas for this system to
even run! LOL
I have been working on this problem for over a year. My house is new.
Everyone, I've asked bragged on him.I've been paying for test for a
year. Waterfurance is all he sells. We just want our system to
If you need anymore info let me know. I just need some help.
units. We went overbuget on HVAC and Nu-wool wall-seal cellullose insulation.
Everything in our home is energy star rated, If that means anything. I did file
a formal consumer complant in Sept. 06. A number of violations was noted. The
State inspectors will be back on the 17th, to find out why nothings been done.
It seems that our installors think of inspectors as pest.
True, but reading the information that he posted... I wouldn't be assuming
things just yet.
Could it be that there are in fact (4) 14" ducts? And not one 14" duct
branching off to (3) 14" zone dampers?
Six tons... 2400 CFM... 20" round metal
But, I think the OP is getting all his information screwed up... like the
"which said we needed a 4.1 ton at 1940 cfm"
"the unit installed is a 3 ton to 6 ton split"
Geothermal Indoor Split Heat Pump, 3 thru 6 ton Dual Capacity. Start-up Feb.
06, My first load Cal. was dated Mar.13,07 .which I paid for. I've paid for
two from two other dealers. One shows 4.1 ton was needed, the other shows 4.7 ,
about the same CFM. They used detailed drawings, Our installor never ask for
any drawings. And as comsumers we didn't know any better.
KJpro, you may be correct on this. BTW, When reading my post it seemed
somewhat aggressive towards you; it was not meant to be. I have a lot on my
mind lately, sorry if I offended you, it was not intentional.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.