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HVAC guys, is this filter housing too small?
- Thread starter dieselrealtor
- Start date
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Bingo.
They replaced the roof top units in a commercial building I used to lease. I didn't get to choose the contractor, the landlord did.
They installed the new curb upside down first go around, had to bring the crane back to fix it.
After they got it all good to go. I find next day to have no heat from 2 of the 3 units.
They come back, it's your thermostats. What? They worked just fine until you monkeys came along. You either A, did not hook them up correct or you fried them while hooking them up.
Two days they couldn't figure out what was wrong.
Owner got belligerent with me that it was stats that was the problem.
I lived 100 miles away from the site.
I drove up, got out my trusty multimeter, only 18 volts being supplied to the stats. Below stats specs, stats that had worked just fine the previous 9 years.
They couldn't figure out how to fix it. Really?
This is among other fun and games I had with them. They should be banished from HVAC land.
Idiots.
their a bunch of bone heads.....i get to mop up a lot of their work....
I have a saying that fits these situations.
If everyone did their job right....the 1st time.....we would not have as much to do and less opportunity to look like hero's.....
Installers by definition are not all that smart. Service tech/installers understand what is what and how these units actually run.
Pick your poison wisely. Low bid is usually not all that great a deal.
There are charts available. It is figured by square footage.
Starts with a Manual J 'load calculation'.
To the OP:
Either use the cheap fiberglass filters or have a 5" media filter installed in the return duct. I'd say the 20x20 filter is probably not adequate for the furnace which its installed.
BTW, if the filter is being pulled on hard, the filter is too restrictive. Not the supply/return ducting.
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Geez, I thought everybody knew you need 1- 8" per ton and 1- 4" per half. 
The furnace is too small...
I have a saying that fits these situations.
If everyone did their job right....the 1st time.....we would not have as much to do and less opportunity to look like hero's.....
Installers by definition are not all that smart. Service tech/installers understand what is what and how these units actually run.
Pick your poison wisely. Low bid is usually not all that great a deal.
The sad part is, the owner was on site the entire time "supervising".
Gee, you suppose the fact that he was related to the landlord had anything to do with him getting the job? Nah, that never happens.
He's been in the business for 50 plus years. Just ask him, he'll tell you. Nope, on second thought you don't have ask him. I heard that line during arguments over their incompetence.
Serves them right, they've been back 3 times to have to do warranty work on them. Control boards failing.
The sad part is, the owner was on site the entire time "supervising".
Gee, you suppose the fact that he was related to the landlord had anything to do with him getting the job? Nah, that never happens.
He's been in the business for 50 plus years. Just ask him, he'll tell you. Nope, on second thought you don't have ask him. I heard that line during arguments over their incompetence.
Serves them right, they've been back 3 times to have to do warranty work on them. Control boards failing.
more than likely ran phone wire for T-stat wire and over amping the boards......ask me how i know.....
you know.....
When Lennox came out with their 1st logic system they specified shielded plenum cable to the room sensors and they not be tie wrapped to conduit with live circuits.
Had 10 roof tops on a movie theater that were going crazy. After an entire day I found in the manual where it said no standard shielded stat wire. It was obvious in the unit it was used. I returned the next day with the gear to get up in the ceiling in the theaters and it was loaded with the good old brown un-shielded wire. It was tie wrapped along the power conduits to the units and ran across the top of florescent lights. Just pulling it off the lights and conduit, routing away from the light ballasts got the units settled down. The original installing contractor got to come in and run new wire. Problem solved.
