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Asked 1 year ago By Rick Furance
Category: Curbs
Current HVAC unit: Carrier 48 DR 012 over a 77" wide by 70" roof opening (Carrier unit replaced an earlier, larger unit. Roof opening size was kept the same at the time). Replacement Unit: Trane YSC120F with base dimension 88 5/8" long (parallel to t...
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Asked 1 year ago By Arshad
Category: HVAC Controls
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Asked 1 year ago By Anonymous User
Category: General Questions
Can you please provide me specifications on your model MB-GP1TA-D00B?  Thanks,  Adam
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Asked 1 year ago By Anonymous User
Category: General Questions
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Asked 1 year ago By Mike
Category: Curbs
My OSHPD DSE has asked for information on the submitted vibration isolated curb 0403-372EH-04010. I cannot find any information on the MicroMetl curb pages. Am I wrong? Mike Mc Henry IOR 10810
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Asked 1 year ago By Anonymous User
Category: Economizers
we have a economizer we are connecting to a heat pump system model BR-229035. the wiring diagram sas see notes 4,5,&6 on page 5 of the instructions. there is no notes on page 5 or a page that has notes???
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Asked 1 year ago By Anonymous User
Category: General Questions
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Asked 1 year ago By bill
Category: Economizers
is the disc shaped sensor for the fan compartment or mixed air sensor
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Asked 1 year ago By Mike
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Asked 1 year ago By naresh
Category: HVAC Controls
how can yo say filters become more efficient , when loaded with more and more partical
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Asked 1 year ago By Mike
Category: Curbs
We are to provide adjustable pitch roof curbs for 2 Carrier Model 50HCCD07A1M6 rooftop units and 1 Trane Model WSC036H4 rooftop unit. The flat curbs that came with the units are model CRRFCURB003A01 for the 2 Carrier Rooftop Units and BAYCURB042AB fo...
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Asked 1 year ago By Airflow
Category: HVAC Controls
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Asked 1 year ago By pb
Category: General Questions
can you over tonnage an ac unit? 2.5 to 3.5
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Asked 1 year ago By taher
Category: HVAC Controls
we have a hall of 75.9m2 area. where we will divide it with 8 offices, probably with gypsum wall partitions. Now the thing is that we have installed 8 ducted split unit of 5TR each. the total tonage will be 36.5 now the area also needs one fresh air ...
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Asked 1 year ago By Fire alarm guy
Category: Barometric Relief
Any chance you could expand on this to clarify a barometric damper effects / uses in a smoke control application?
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Asked 1 year ago By Josh
Category: Economizers
Horizontal or Vertical Economizer for a rooftop unit with horizontal supply ductwork and vertical return ductwork?
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Asked 1 year ago By Pacman3431
Category: Curbs
Hello, I am installing 2 7.5 ton carrier RTUs and these units are replacing 2 Trane units about 24 years old. I want to discharge to be horizontal like they at enow but I need an empty curb adapter to rotate the carrier units 90 degrees to try to get...
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Asked 1 year ago By Mel
Category: Economizers
can you use the mixing box to supply outside air as needed per code? When the mixed air sensor senses to cold of air it closes down on outside air. In extreme temps both cold and hot that we get in MN will the cube be able to supply enough outside ai...
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Asked 1 year ago By Larry
Category: General Questions
how many 5/8 v belts are required to transfer 50 hp from a 6 in pulley operating at 1600 rpm to 18 in pulley operating 18 in center to center of shafts.
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Asked 1 year ago By Airflow
Category: HVAC Controls
How do you resolve static air pressure problem
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Asked 1 year ago By jim
Category: General Questions
I have a big electric motor with a 6 groove sheave.  I have 2 v-belts each with 3 grooves.  Circumference of the belt is ~ 50'. Generic question is that if they are aligned proplerly, tensioned properly, and assumed to be same length, will the belts ...
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Asked 1 year ago By jayakarthick
Category: General Questions
Other than the clearly oversaw chart, the CNC unit offers a daze secured strengthen with pictures that demand shockingly clear programming.Unmistakably, this space is bound with various sorts of windings. For example, sectional and trapezoidal windin...
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Asked 1 year ago By Abdullah
Category: HVAC Controls
how is static pressure generated? Like in the intake of ID fan there is a static Pressure. It can be measured by using manometers. But how this pressure is reached? What are the steps taken to achieve such static Pressure?
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Asked 1 year ago By mike
Category: Curbs
Hi, I have a roof top exhaust fan to install. the metal roof has a 12/4 pitch. the outside dimensions of the curb is 35"x35". do you have anything that will work for this installation. thanks mike  mike@resslermateer.com
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Asked 1 year ago By Ed Kirk
Category: General Questions
Hello I am the instructor for the HVAC program at Palomar College.  We are in the process of starting a new HVAC program and I am looking for a source to design and fabricate some equipment for our program.  I was at the College of the Desert in Palm...
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