Hi velocity systems

[dan sw fl]

Originally posted by deejoe

Originally posted by dan sw fl
]... sounds like a Real Oxymoron
That is, Hi Velocity & Energy Savings
______________________________________

ox·y·mo·ron ( P ) Pronunciation Key (ks-môrn, -mr-)
n. pl.
ox·y·mo·ra (-môr, -mr)
or ox·y·mo·rons

A rhetorical figure in which incongruous or contradictory terms are combined, as in
a deafening silence
and
a mournful optimist.

************************
The above is another perfectly incorrect analysis from an ill informed poster. [/B]

klkpro,

deejoe should somehow be able to provide all the
independent specifications and test data necessary to
convince Everyone that
Hi Velocity systems are real energy savers.

[beenthere]

Originally posted by BobbyBJr
You guys that install the high velocity Unico systems, what outdoor units do you match with these units? We have several developments locally that are all split level with old Space-pac systems. Over the years, we have replaced a few and tried Trane, Carrier and Goodman outdoor units and it is a crap shoot. One might run fine while the one down the street is a constant headache.

Bobby

Check the static pressure. The ones that don't work well might be low air flow. Due to the supplies being long, and not enough of them to make up for the length.



Yep, HV systems are expensive.

So are Jaguars, but there is a market for them.

[dan sw fl]

Originally posted by beenthere

Originally posted by BobbyBJr
1. You guys that install the high velocity Unico systems, what outdoor units do you match with these units?

... all split level with old Space-pac systems.

Over the years, we have replaced a few and tried Trane, Carrier and Goodman outdoor units and it is a crap shoot. One might run fine while the one down the street is a constant headache.

Bobby

Check the static pressure. The ones that don't work well might be low air flow. Due to the supplies being long, and not enough of them to make up for the length.

Yep, HV systems are expensive.

So are Jaguars, but there is a market for them.

1. You SIMPLY DO NOT Expect to consistently achieve a Good Match as you have discovered
without knowing the Unico coil specifications.

If you have driven a Jaquar for two decades
and you switch to a Chevy, OF COURSE,
one will have CONSTANT HI-VEL HeadACHES.

In addition, one would not Realistically expect a
HI Velocity blower to be replaced
at the time as a condenser replacement
_and_ operate close to satisfactorily
with anything but an air handler that
provides the same E.S.P.

[lynnwill]

I am surprised by your experience with these systems. Their use may depend on the location and age of houses in the area. I am in the Philadelphia area surrounded by homes 75-150 years old. Mine is 80 years old. I have two Unico Zones. A conventional system would have required great disturbance, soffits and repairs. I got three conventional and two Unico quotes. In my case the HV system installation was lowest cost! The system was installed quickly. It is completely unobtrusive with all ceiling openings installed at or near in corners. The compressors (3 & 2 ton) are by carrier. The systems are quiet, provide high dehumidification and have completely changed my enjoyment of my home. For the record my heating system is hydronic with high mass cast iron radiators.

The key may be an experienced installer. My contractor has installed many (perhaps hundreds) of these systems. This includes two happy friends after they witnessed/experienced our system.

[Edited by lynnwill on 04-19-2006 at 11:56 PM]

[BobbyBJr]

Originally posted by dan sw fl

Originally posted by beenthere

Originally posted by BobbyBJr
1. You guys that install the high velocity Unico systems, what outdoor units do you match with these units?

... all split level with old Space-pac systems.

Over the years, we have replaced a few and tried Trane, Carrier and Goodman outdoor units and it is a crap shoot. One might run fine while the one down the street is a constant headache.

Bobby

Check the static pressure. The ones that don't work well might be low air flow. Due to the supplies being long, and not enough of them to make up for the length.

Yep, HV systems are expensive.

So are Jaguars, but there is a market for them.

1. You SIMPLY DO NOT Expect to consistently achieve a Good Match as you have discovered
without knowing the Unico coil specifications.

If you have driven a Jaquar for two decades
and you switch to a Chevy, OF COURSE,
one will have CONSTANT HI-VEL HeadACHES.

In addition, one would not Realistically expect a
HI Velocity blower to be replaced
at the time as a condenser replacement
_and_ operate close to satisfactorily
with anything but an air handler that
provides the same E.S.P.

When we replace one of the old Space-paks, we use the Unico air handler and whatever condenser the estimator can get the best deal on that week. At least, that is the way it seems. I have had good luck with Trane outdoor units, but some have been a pain in the rearend. Was just wondering what some of you that install them are using? I do measure the static and the air flow too, but I have never had any HV training and once I gather the info, it don't tell me alot.

Bobby

[beenthere]

What static readings are you getting.

When swapping out an old unit, you some times have to add an ouotlet or 2.

The old systems were 5 outlets per ton, the new ones are 6 per ton.

What kind of problems are you having.

Used York, Carrier, etc, and haven't had touble.

[Coy]

Lynnwill - Like you, I'm in the Philadelphia area in an older home with plaster walls, cast iron radiators, and am looking to install probably a HV system due to installation issues with conventional. Who was your contractor?

Regards,
Coy

I am surprised by your experience with these systems. Their use may depend on the location and age of houses in the area. I am in the Philadelphia area surrounded by homes 75-150 years old. Mine is 80 years old. I have two Unico Zones. A conventional system would have required great disturbance, soffits and repairs. I got three conventional and two Unico quotes. In my case the HV system installation was lowest cost! The system was installed quickly. It is completely unobtrusive with all ceiling openings installed at or near in corners. The compressors (3 & 2 ton) are by carrier. The systems are quiet, provide high dehumidification and have completely changed my enjoyment of my home. For the record my heating system is hydronic with high mass cast iron radiators.

The key may be an experienced installer. My contractor has installed many (perhaps hundreds) of these systems. This includes two happy friends after they witnessed/experienced our system.

[Edited by lynnwill on 04-19-2006 at 11:56 PM]

[lynnwill]

We went with Unique indoor Comfort. www.phillyunique.com
The best installation deals are in the Winter

Good luck

[cmajerus]

we have installed a couple dozen ESP HI-V's after figuring out the proper setup of the TXV's I am happy with them, and I sure as heck guarantee we would have charged $$$$ more for conventional on the homes we did. I will say when at all possible install the air handler in a closet or basement not the attic, the attic installs are the only ones we have issues with, plus all the adjustments and readings are done at the indoor unit. We use trane condensers, they are now selling the hi-v for 410a also I think.

I do think most of our installs were a bit louder than Iwould like but we installed by the book for outlets. I think the 12x12 return grill is part of the problem

[ferco]

We recently had 2 spacepak systems installed with Lennox xp-19 heat pumps. We have had consistant problems and the installing company has abandoned us. I now have a installer trying to correct the problems. He has added additional ducts to lower the static pressure. One issue is the condensors shutting down. He has not has any expierence with Spacepak and his issue that the 19 seer is sending too much liquid into the a-coil(which has 3/4" outlets) The supply line coming from the condenser is 11/4".
Has anyone ran into this issue?

[cmajerus]

We recently had 2 spacepak systems installed with Lennox xp-19 heat pumps. We have had consistant problems and the installing company has abandoned us. I now have a installer trying to correct the problems. He has added additional ducts to lower the static pressure. One issue is the condensors shutting down. He has not has any expierence with Spacepak and his issue that the 19 seer is sending too much liquid into the a-coil(which has 3/4" outlets) The supply line coming from the condenser is 11/4".
Has anyone ran into this issue?

never installed a heatpump on a hi-v so suction line side of acoil is 3/4 with 1 1/4 coming from condenser, is the spacepak designed for that size condenser or is your indoor coil too small, what kind of metering device is being used, the adjustable txv's on a energy saving products Hi-V need to be tuned in on every job, would you have to readjust the outdoor one for heat mode? I would be leary of using a heat pump on a Hi -V.

[ITB CO]

You all need to look at Espi Tech llc. They offer Velocity Plus in 2-5 ton ratings all 13 seer and 300cfm/ton. The entire system is r8, pre drilled and NO sound attenuation. They also offer a 3 inch system that is 1/3 the cost of 2 inch and a very unique air disribution box that simplifies install. It is a better design and they did meet the 13 seer level.

[Freezeking2000]

Did a 3 ton heat pump on m neighbors unico. Used a Heil 2.5 ton condenser on a 3 ton air handler, never had a problem yet. (2.5 years)