AC without a drain pan in attic

Courtesy Structure Tech

I came across a leaking unit a couple of weeks ago, and found moisture all throughout the first floor and basement ceilings.

When this type of setup occurs, there are four options for dealing with condensate. They’re not listed in this order in the mechanical code though; I re-arranged the order because I think it makes more sense to read it this way. Choose one of these four:

1.  A drain pan with a separate drain — A separate drain pan can sit underneath the unit, and this drain pan needs to have its own separate drain line. This pan needs to be at least 1-1/2” deep, and must be at least 3” wider in every dimension than the condenser unit.

2.  A drain pan with a shutoff device — A pan with the same dimensions as listed above can be installed without a secondary drain, provided there’s a shutoff device installed that meets UL 508. I don’t own that standard and I don’t know what it says, but I’ve seen plenty of these shutoff devices, and they’re pretty simple.  They sit inside the drain pan or they’re mounted to the side of the drain pan.  It’s that red device in the photo below. That particular one is called the Condensate Cop.

If water fills up the pan, a float shuts off the air conditioner. This type of device is quite simple and effective.

3.  A shutoff device — A shutoff device for the air conditioner may be installed all by itself. If this is done, it needs to be installed “in the primary drain line, the overflow drain line, or in the equipment supplied drain pan.”

4.  A separate overflow drain — A separate overflow drain line can be connected to the secondary drain opening that is built into the equipment, but if this is done, it needs to drain to a conspicuous location. It can’t just drain to a floor drain or to the outdoors.  The purpose of this is to alert someone that water is coming out of some place that it shouldn’t, and there’s a problem. Ideally, someone would go check it out and clear the clog in the clog that’s causing condensate to leak to an unusual location. — Reuben Saltzman, Structure Tech

Wayne Gretzky’s boyhood home

Wayne Gretzky’s Boyhood HomeCourtesy Structure Tech

So you take a hockey puck and hold it in place while you foam it in. Brilliant! There are better ways to repair and replace soffit


Proper Grounding—Not!

ground clampCourtesy Structure Tech

OK think about it. This guy grounded to a PLASTIC COATED gas line. Unless they changed the rules, plastic is a non-conductor. How many other electrical mistakes do you suppose you would find in this house?