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The zero attic space still contributes a LOT to the cooling load of the house. If you want the best system, this is going to hurt…

First, you need to remove the ceiling, replace those tiles with...

First off, you don’t have 102kBTU of cooling, you have 84k, unless the 18K unit has its own condenser as well.


Now, keep in mind, ALL the equipment doesn’t need to run at the same time. A...

Completely insane.

If cost difference isn’t a factor, I would install the variable speed 20SEER2 equipment, 5 ton, that will ramp up and down, based on load. You WILL have to get additional ductwork to properly support...

Me too... a floating ad, and several spread through the psot listing...

Yes

Mylar tape should adhere to vinyl duct insulation.

In a dehumidifier it would be nigh impossible to get a reading due to placement of coils…


Either way, it doesn’t matter here, as DIY specifications are not allowed to be put on the site. ...

What you seem to be missing is the human body comfort level is based on energy transfer, not temperature.

On warm days you feel more comfortable with a 71F setpoint, because the temp offsets the...

Heh, i liove the dual/duel meme...

In mild weather, with modern heat pumps, aux heating is rarely needed, other than wet cold days due to defrost mode.

A 70 pint dehumidifier would bring in about 250W of heat per operating hour, likely similar to a mini-fridge, so i wouldnt be concerned with the heating aspect of it on a mostly underground...

I'm searching for a criticism and failing.
Maybe the 1/2" bubble wrap. I prefer the 1" but in a conditioned basement it's not needed.
I'd like a pic that shows the condensate trap connector.

Yeah, very common. Nigh impossible to abate.

Builders route and strap things for security, but fail to consider vibrations.

Aside from opening the wall and securing the lines differently, there...

Get in with good light, seal all gaps, tape, foam, etc. But cover it with mastic.
Mastic is rated for air plenum.

Many people feel the AC ducts should be high, so cold supply air will fall, and heating ducts should be low, as hot air rises, but the truth is… it isn’t the supply ducts that do the majority of the...

I usually recommend my customers search amazon for the size filter they need.

Honeywell zone systems have a purge cycle between stages.
So for instance, if the upstairs was set to cool, and down was set to heat, whichever one was calling first would activate until the...

I can tell you that electricity does not care what color the wires or connectors are.

If you are going to do this yourself, do some research and find out what each terminal on the capacitor is...

I use this.

869205

Air has mass, and energy is lost ramming into obstructions, forcing the equipment to run harder.

Learn about manual D, and total equivalent length.

Certainly need a filter cabinet there as...

If you have a box and blow into one straw, you get a lot of flow, if you blow into 50 straws the flow goes nowhere.

If you have poorly designed ductwork, made to gravity flow hot air, you will...

If air temp drops in 15 minutes, RH will rise because little moisture is removed.

In order for an ac system to remove moisture, there needs to be a warm load. Either you have to run a heating...

I sort of agree with you on the rotary compressors, however, they are easier to setup in a variable speed configuration.
And with a good build, the compressor is very robust.
Danfoss, and Daiken...

What formula are you using to calculate the kW needed?

A can of soda from the fridge will condense a few tablespoons of water in a few minutes...
Dont forget dehumidifiers are a closed loop...

Is there a question here?
Easy filter sizing is 200sqin per ton as a minimum filter size.

If the offset for the lineset is what i think it is, lilely you dont need to count that.
From there, how many 90 and 45s are there?

If the furnace is already erroring out due to flue, i would be inspecting ANY horizontal piping for water trapping.
Too long, or too many elbows will be an issue, but shouldnt cause lockout.

One important thing to consider with minisplits is home filtration.
Limiting dust intrusion as well as adding dedicated building filtration.
Minisplits do not have good filtration, basic plastic...

Glad you found the thread.
Air sealing is critical to getting comfort from heat pumps.

It is against code to oversize air conditioning equipment to meet momentary loads.

Please dont consider this.

Size the system correctly, and be happy with energy saved.

Think about it like this.

It is far more efficient to vary the output of the Hvac equipment to the loads throughout the day, than to allow excessive gain, and expect the system to take care of...

High efficiency and rapid recovery are not compatible terms.

Efficiency is gained by running EXACTLY what the building is gaining/losing all the time. It is a bad idea to anticipate letting the...

I think he is just doing startup of his furnace… not actually wanting to service it.

This forum does not provide DIY service instructions, but as a homeowner, ya need to know some rules…

If...

80F input temp is too high for a furnace to operate…

Make sure the air filter is out of the bag…
You would be surprised how many times this was the problem on a call…

Can you post pictures? You may not be discussing what we think you are discussing.

I will never understand why any installers would use this method of dehumidifier install…

It appears that heat pump control wire was installed.
Only 4 conductors are needed to install a bosch variable speed condenser.
Ask your installation crew if they can get a match with bosch on an...

Of course we have ideas of what MIGHT be happening.

This site however does not allow diy diagnostic assistance.
Sorry.

Since that is not a heat pump, what type of heating do you have now?

Electronic air cleaners don’t use a media to catch dust, they have several electrodes and collection plates.

Yep… my grandpa teached me how to read the flame flicker and smoke in the viewfinder. The analyzer confirms it, and makes it possible for underlings to set air.

Hey, remember back when we had air...

I gotta ask…

Where is the north eastern part of south Florida?

Up to 15 degrees of tilt is allowed. More than that can cause failure.

Make another post and get your post count at 7, and you can post pictures.
Id like to see how the unit was installed.

@vstech

Thanks, but we're in Columbia, which is definitely a bit further from NC than would be helpful. Yeah, I get it, but I'm just going by who I have contacted. I basically contacted the top 6...

What part of SC?
if near NC, i could come take a look.

With ALL due respect, this forum SPECIFICALLY states NO DIY advice or assistance.

What you are asking is exactly what you said. An outdoor thermostat.
We cannot advise you what to do, or how to...

My supply house is providing a training class in march on the new refrigerants.

I have worked with hc refrigerants before, and the enthalpy and heat content checks likely will be similar, so im...

Yeah, that is a useless number.
What did he suggest as a remedy?
A blower door test can measure negative pressure, and provide useful info like building infiltration loss etc.
408 is a useless...

F.Y.I. the reading between blower and coil is not used.

Unless you have a static number when new to co.pare with.

As stated, you have undersized ductwork.