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It was actually the equipment manufacturer reps which presented it that way during product training way back when the first R410-A systems hit the market. Most of the technicians I spoke to in our...

Low suction pressures will cause overheating of the scrolls and permanent damage the compressor drive bearing.

I am therefore not a fan of this procedure.

Low suction pressures will cause overheating of the scrolls and permanent damage the compressor drive bearing.

I am therefore not a fan of this procedure.

Some manufacturers are using small diameter condenser tubing which makes pump down very difficult if not entirely impossible.

I would caution about partial pump downs on R410A systems. Since its...

So true!

Anyone having a client which has a furnace with a single pipe installation and a flame sensor which fails more often then usually? Check if they store any household chemicals nearby,...

At the end of the day its is us technicians which make a recommendation for our clients to choose one unit over another. Most of the time there are only neglect able nuances why we prefer a certain...

Very good point.

So many times I see furnaces installed with only the combustion exhaust pipe connected and drawing combustion air from inside the house. That will slightly depressurize the house...

That is one option. The other is taking a hydronic fan coil unit and adding a evap coil. Still hoping to find a unit which incorporates it all.

Thank you for the reply. The cabin is good (front return) but instead of electric heat we have to have a hydronic coil.

My supplier has all the specs and pictures and exhausted his search, hence I...

We do have a substantial amount of clients with medical conditions which includes immune deficiencies, pulmonary disorders,...

As far as the mechanical part of improving indoor air quality we...

More specifically only use aluminum snap lock which has a better heat retention and therefore reduces condensation and ultimately lint build up. Important to avoid screws to connect several lengths...

Below is my personal experience and there might be technicians out there which have a better ride with their products.

I put in more then 20 units from the first right up to their third generation...

Thanks, forum rookie here and no worries about being a tech or not I got my sore knees and back to proof it.

I saw the AWUF and again they have bottom return. I am looking for front return.

You guys are hilarious! I just proved you wrong. Contractor since over 20 years in business (never advertised) and loving it. Don't know why you are insulting our trade by claiming that we can't...

Really? How do you possibly come to that conclusion by just reading what I wrote?

I don't believe that by answering your rudimentary question about sizing a system would give you anymore clues if...

I am in the process of replacing a.m. obsolete air handler and wonder which current products are closest to the existing units dimension and are also front return design.

I need to keep the duct...