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Viper677
Certified Home Inspector

join:2012-03-22
Toronto
reply to scross

Re: Another a/c issue.

said by scross:

said by neonturbo:

I can hit a 68 degree setpoint in 100 degree weather and the unit still cycles. It is only off for 5-10 minutes at this temp, but still I am pushing it pretty hard.

My equipment is about 10 years old, and it is sized as close as they could for my house. When you get to houses smaller than 900 sf, you have a limited choice of system capacities. I think it is a 1 ton, but I am not where I can check at the moment.

I think the reason I can get it to cool so well is I have insulated the attic to R50, and added a radiant barrier. The rest of the house is fairly tight, but the 15 year old vinyl replacement windows don't seal perfectly.

I need to do some serious insulation upgrades in my attic, too. But one thing I've noticed is that my entire house is very susceptible to sun exposure in the afternoon. That is, if it's 100 degrees and cloudy, no problem; but if it's 100 degrees and sunny, then my wife starts complaining. So I'm researching ways to mitigate this.

Get an infrared inspection done to check for insulation voids.
--
Certified Home Inspector
Certified Level 1 Thermographer


alkizmo

join:2007-06-25
Pierrefonds, QC
kudos:1
said by Viper677:

Get an infrared inspection done to check for insulation voids.

Can you rent those thermal cameras for 50$-60$ for a day or a couple of hours?

My biggest worry when I installed R55 insulation in my attic was having voids.

Next winter I want to check my ceilings for heat loss.

Viper677
Certified Home Inspector

join:2012-03-22
Toronto
said by alkizmo:

said by Viper677:

Get an infrared inspection done to check for insulation voids.

Can you rent those thermal cameras for 50$-60$ for a day or a couple of hours?

My biggest worry when I installed R55 insulation in my attic was having voids.

Next winter I want to check my ceilings for heat loss.

As far as I know you can rent a decent camera for about $100 - $125 per day. I dont think they let you have it for a couple of hours.

Now, I would also recommend you to hire someone to do the scan for you instead of just renting it. A thermal camera is not a point and shoot device and you need to have some experience to interrupt the anomalies.

Also, in order to get the best/right results you need to have a d-t of about 10C between inside and outside.

The best time to get someone to scan the house is in winter.

Most of the people who rent these cameras (that I know of) are the people who are professionals and already have a job lined up. So they rent the camera, get the job done and return the camera. They do it so they dont have to own a camera.
--
Certified Home Inspector
Certified Level 1 Thermographer

scross

join:2002-09-13
Cordova, TN
said by Viper677:

said by alkizmo:

said by Viper677:

Get an infrared inspection done to check for insulation voids.

Can you rent those thermal cameras for 50$-60$ for a day or a couple of hours?

My biggest worry when I installed R55 insulation in my attic was having voids.

Next winter I want to check my ceilings for heat loss.

As far as I know you can rent a decent camera for about $100 - $125 per day. I dont think they let you have it for a couple of hours.

Now, I would also recommend you to hire someone to do the scan for you instead of just renting it. A thermal camera is not a point and shoot device and you need to have some experience to interrupt the anomalies.

Also, in order to get the best/right results you need to have a d-t of about 10C between inside and outside.

The best time to get someone to scan the house is in winter.

Most of the people who rent these cameras (that I know of) are the people who are professionals and already have a job lined up. So they rent the camera, get the job done and return the camera. They do it so they dont have to own a camera.

I have an inexpensive laser infrared thermometer which I used to scan my ceilings and outer walls. That's how I've located most of my known problem areas, which register much warmer than other areas when the sun is blazing down. An infrared camera would have been faster, but these aren't cheap.

Come to think of it, many modern digital cameras and video cameras have a night/infrared mode, which might work pretty well, too. No fancy colors, probably, but you don't really need them. I have a couple of these, so I may have to do some experimentation. This will probably be best done just after sundown, with all the lights out.

iknow
Premium
join:2012-03-25
said by scross:

Come to think of it, many modern digital cameras and video cameras have a night/infrared mode, which might work pretty well, too. No fancy colors, probably, but you don't really need them. I have a couple of these, so I may have to do some experimentation. This will probably be best done just after sundown, with all the lights out.

what i've heard is they have infrared blockers in the cameras now to stop the "infrared naked" pictures. to fix that, you have to disassemble the camera, and remove the filter, and replace it with plain glass of the same size, though. it's possible a camera that advertises it has infrared capability is still made though.(probably expensive).

scross

join:2002-09-13
Cordova, TN
said by iknow:

said by scross:

Come to think of it, many modern digital cameras and video cameras have a night/infrared mode, which might work pretty well, too. No fancy colors, probably, but you don't really need them. I have a couple of these, so I may have to do some experimentation. This will probably be best done just after sundown, with all the lights out.

what i've heard is they have infrared blockers in the cameras now to stop the "infrared naked" pictures. to fix that, you have to disassemble the camera, and remove the filter, and replace it with plain glass of the same size, though. it's possible a camera that advertises it has infrared capability is still made though.(probably expensive).

I have a camera that has night mode and a built-in IR lamp, so it should work pretty well. I doubt that it has any such filter, especially given that it's at least 10 years old now.