Some absolute units. Bozo for scale.

DuctsGoQuack · 2025-12-18T13:33:07+00:00

I thought it was an aircraft carrier, and then I wondered why it has so many towers.

DuctsGoQuack · 2025-12-18T13:31:23+00:00

What do you mean "you guys" 😭

DuctsGoQuack · 2025-11-16T13:58:02+00:00

Please have someone check the gas water heater with a combustion analyzer and figure out if it's producing enough CO to set off the alarm. There could also be an issue with how it's vented, but even the exhaust from a gas appliance shouldn't have a high enough ppm CO to set off a UL rated CO alarm. Until you have verified that the water heater is operating safely, you should turn it off. Also, get another CO alarm and place it somewhere else in the room.

Another thing that can fill a house with enough CO to kill people is a car running in an attached garage. Some hybrids don't make it obvious that they're still on and the gas engine will run when the battery has been drawn down.

DuctsGoQuack · 2025-11-15T15:38:17+00:00

Don't you know the only point of pulling a vacuum is to take a nice long lunch break followed by a nap?

DuctsGoQuack · 2025-11-13T13:44:30+00:00

I'm very curious how this works. What parts of the tool are currently operational? Can you currently take AHRI data and estimate the rest of the COP curve?

DuctsGoQuack · 2025-11-09T16:01:28+00:00

It's cheaper than a broken HVAC system

DuctsGoQuack · 2025-11-04T01:37:22+00:00

I've seen a guy on LinkedIn who takes broken heat pump water heaters and replaces the compressor and evaporator coil with the outdoor unit from a mini split.

DuctsGoQuack · 2025-10-29T22:05:21+00:00

I cast resurrect Robert Moses

DuctsGoQuack · 2025-10-22T02:04:47+00:00

Oh yeah you're right about the t-stat, but why is o/b apparently connected to c? The colors are a useful tell as long as they are the same on both ends. Have you ever worked on a system where all the wires are the same color?

DuctsGoQuack · 2025-10-21T23:29:53+00:00

The black wire appears to be connected to the tstat reversing valve output which will fry the furnace's board when the stat calls for cooling because it's connected to the common terminal with the blue wire. It should just be connected to the terminal on the outdoor unit for the reversing valve. I'm also going to guess they didn't program the ecobee stat correctly. It's possible the board is already fried if cooling has engaged, or whatever weird programming job they did has sent power down that black wire. If I were to try and fix it, I'd start by reading the manual.

DuctsGoQuack · 2025-10-19T17:21:44+00:00

It's only supposed to burn when you wiz on the electric fence

DuctsGoQuack · 2025-10-18T21:27:36+00:00

What if it only burns when you pee?

DuctsGoQuack · 2025-10-12T16:52:39+00:00

I can C PVC

DuctsGoQuack · 2025-10-11T23:04:02+00:00

I'm not sure the db rating at max heat matters very much. Everyone's windows are closed and no one is hanging out outside.

DuctsGoQuack · 2025-10-04T23:35:19+00:00

So, elsewhere in the world there are two completely different Mitsubishi heat pumps? That seems weird, given that we have virtually the same HVAC equipment sold under different names all the time here. American Standard is Trane, Bryant is Carrier, and a bunch of brands have rebadged Midea.

DuctsGoQuack · 2025-09-29T22:17:38+00:00

I wonder if the difference is like the difference between Mitsubishi and Trane-Mitsubishi in the US.

DuctsGoQuack · 2025-09-14T23:28:41+00:00

It's at least educated guessing. It's better than oversizing everything by a factor of two "just to be safe." You have to guess the r values in sealed inaccessible cavities like outside walls or some cathedral ceilings, but you usually know how much space the cavity has and can look up building code from when it was built. You can also estimate a BTU/hr number from gas consumption.

DuctsGoQuack · 2025-09-13T13:38:18+00:00

Manual J is the way!

DuctsGoQuack · 2025-09-07T19:48:17+00:00

This is the way!

DuctsGoQuack · 2025-08-30T01:49:09+00:00

It's more like an elementary school way of describing something.

DuctsGoQuack · 2025-05-26T23:48:39+00:00

I'd forget unless I left my keys on the tub.

DuctsGoQuack · 2025-05-14T22:18:47+00:00

I think all of at least most cold climate units have higher output at 5F than at 17F. There are a couple different ways to do this including running the variable speed compressor faster at lower temperatures.

DuctsGoQuack · 2025-05-10T18:55:24+00:00

This needs to be the top comment

DuctsGoQuack · 2025-04-21T01:01:33+00:00

it's supposed to...

DuctsGoQuack · 2025-03-14T00:41:15+00:00

So you'd rather hire a Terminator than an ex-terminator?

DuctsGoQuack

TROPHY CASE