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Required air flow is dictated by equipment size (at least as far as residential equipment is concerned). Equipment size (should) be dictated by a load calculation. The duct design needs to move the required airflow. The load calculation determines how many of the btu's are needed for each...

Damn. I probably would have overreacted and gave up at that point... 🙃

Then it will cost 2x as much as a track drive Honda and work half as good... :lol_hitti

The blower speed has to be set properly. Blower speed (CFM) is dictated by equipment airflow requirements. A regular multi speed split capacitor motor will lose airflow as static pressure goes up. This can be seen i furnace airflow charts. A variable speed motor is different. It will try to...

It's gonna be fixed in V2... or V3... promise 🙃 Neighbor across the street has one from Menards and it seems to work OK.

If it's platform, then there should be a top plate at the attic. How the soffit is vented is another matter entirely. Your best bet to find the problem areas is to have a blower door test done and then go around and find the air leaks while the fan is running, usually with a smoke pen or fog...

Any suggestions for a decent piece of equipment? I don't have to buy one today. The Grizzly above is one that meets the SFPM specs for metal, and it has bad and some good reviews. Yes, there is the possibility of finding that cherry old one stuffed in a garage, but my brief searching shows old...

Quick search shows very limited number of belt sanders without a disc. At least in the consumer range.

Interesting. Something to consider. I realized the issue with the disc size because about half of it is blocked off.

If the house is balloon framing, the exterior wall from the ground/basement to the attic is one continuous opening. So yes, it needs to be sealed. Unlike platform framing, there is no firestopping at each level (or at 8' as required by code). Wall studs and headers will not necessarily follow...

There are things that can be done. Yeah, about that... good luck.

These might save your equipment. https://www.intermatic.com/Product/AG3000?setcontextlanguagecode=en

The test is simple. You either buy an ECM motor tester that can test the individual speeds, or you check for the control voltage at the blower speed tap on the furnace control board. If the motor fails while checking the speeds with the ECM motor tester, the motor/controller is bad. Or if you...

That particular Grizzly model claims 5000 SFPM.

Point taken on the used equipment. What is a good choice otherwise? Something may not show up on the used market by the time I might buy one.

I eventually plan to fabricate an exhaust system out of 3" 304SS tubing and will need something to face the cuts. Looks like ~5,000 SFPM is needed for metal, which is a ~3400 rpm motor. Only have single phase power and really do not want to or need to blow thousands of dollars on one of these...

The companies do not want them to understand it. The companies want them to condemn it and sell a new one. Then they send the "install team" out and get paid big bucks when it is done (the company, not the workers). Time and money also starts to add up fast at retail diagnostic rates.

A wire that is not set properly into the connector end can give intermittent issues. Or, the wire/pin assembly is not set properly into the plastic connector. No. Yes, BS. It isn't necessarily a "lack of gas furnace experience" problem. Are you having gas problems or electrical problems? The...

I hate plugging it because the software has not been updated in years, but HVAC-Calc will sell a single use license for $50, last I looked. There is a demo on the website. The software will not work on higher resolution monitors unless the settings are changed, and it has been like this for...

Why would one not call the supplier and stop the job? In this situation, it would have been the easiest thing to do. Check your stuff on the dock before leaving, especially for equipment. I have seen stuff like this so many times on different jobs over the years. Sometimes it is an honest...