The only thing Continuous Radon Monitors (CRM) do continuously is power their timers. “Why is that?”, you say. CRM timers tell the machines when to sample for Radon. Yes, that’s right, I said, “sample.”
Some popular machines only sample once every hour, others once every half-hour. Either way the most readings your getting over a 48 hour period is 96! The average of these samples is your result.
Everyone knows that the more samples you have the better their average represents the actual quantity.
The only way to get a truly continuous result is if you have a chemical reagent that changes over time. Film and photo papers are good examples of this. Exposure to light changes them over time.
Two Radon Measurement technologies exist that do just this. Each gradually changes over time when exposed to Radon continuously. The sample is the entire 48 hour time commonly allowed of Radon measurement for Real Estate transactions.
The most consistently accurate of these two are charged electrets. An electrical charge is placed on two electrets and measured before exposure to Radon. After the exposure time is complete (48 hrs.) they are measured again. Because the charge decays in the presence of Radon, the difference in readings will accurately measure the quantity of Radon in the home.
Radon equipment should be calibrated annually. Measurement should be done in the lowest livable level of the home. If the buyer intends to finish the basement it should be done there.
Your report should tell you where in the home the measurement was taken, the final result, and the equipment calibration date. The equipment calibration date should never be more than one year from the test date. This assures you that equipment maintenance is up to date.
January is National Action Month for Radon Awareness. Do you know the Radon levels in your home? Do you know the effects of long term exposure to you and your children.
Independent Home Inspection is offering a 20% reduction in our fee for Radon tests with or without a home inspection. This includes testing those homes that already have a Radon mitigation system. Testing homes with mitigation systems installed insures their continued effectiveness at reducing Radon to safe levels.
You’re wise to check your new home for Radon before you buy. The EPA says all homes can have Radon. This includes new homes as well as older homes. No mitigation systems installed in your neighborhood may simply mean those homes haven’t been tested.
So, what results do you need to make a decision about Radon levels. The answer is simply the average concentration over the testing period. This includes short term tests, as in a Real Estate transaction, or long term tests that might be done to monitor the effectiveness of an installed mitigation system. The EPA has set 4.0 piCul as the action level for a single family home. At or above that level requires a mitigation system to reduce harmful Radon levels.
Independent Home Inspection uses an electret based Radon monitoring system to measure your homes Radon level. Electrets have an initial electrical charge that decays at a known rate in the presence of Radon. I use annually calibrated equipment to measure the electret charge before and after exposure and a computer generates the result on the basis of the measured differences.
Electret systems advantages are many. They require no power source during testing. They continuously respond to Radon exposure rather than sampling (other methods sample hourly or ½ hourly). Results do not require a lab and accurately indicate the Radon average over the testing period. In fact this method of Radon testing has been determined to be the most accurate system available today.
Independent Home Inspection is available to test your homes Radon either with a home inspection or alone. Call or text today for availability and cost: 410-504-3751
In this election year we have been besieged with troubling allegations of dishonesty and corruption at the highest levels of government. We have become all too familiar and acceptant of the low standards commonly attributed to politicians.
At Independent Home Inspection honesty is job number one. I report things only as they are without the exaggeration we so often encounter.
Even new homes have some defects. All defects can be fixed. My pledge to you is to simply present them honestly for your evaluation. You will then be in a better position to decide how to proceed.
You may not have given your garage door much thought lately. You press a button and it opens, another and it closes. Have you ever lost power to your door and had to open it by hand? Do you know how to do that?
Your garage door could be quite heavy. Older overhead doors were made entirely of wood. Newer doors are usually aluminum or fiberglass.
There will be a way to disconnect your overhead door from the opening apparatus so you can open it manually. This is usually a short cord and handle hanging from the track about half way to the door. pulling it disengages the door chain or cable and the door is then free to be raised.
Overhead door remote operation should be checked occasionally to ensure safe operation. The ‘electric eye’ operation to prevent door closure is fairly obvious. Recommended height for this beam is 4-6 inches off the floor. Too low and it may shine under your car and allow operation when you are only partially in the garage.
Less obvious is the automatic reversing feature required of overhead doors. This will reverse the door when it strikes an object while descending. This will not prevent damage or injury but will prevent entrapment of the object or person.
The Garage Door Manufacturers Association recommends testing the reverse function with a 2×4 laid across the door opening. Adjustment is usually a simple operation, consult the manufacturers manual for detailed specific information.
Children should be cautioned or forbidden as necessary to prevent dangerous overhead door operation.
The idea behind smoke alarms is fairly simple. If you are alerted by the smoke before he flame reaches your location, you will have more time to escape.
Multiple smoke alarms that can signal each other can alert you even before the smoke reaches your location. These new alarms are ‘interconnected.’ This can be done either with an actual wire or with a dedicated RF (radio frequency) signal.
Many of the homes with fatal home fires were found to have smoke alarms with dead batteries. Either the batteries were simply to weak to operate the alarm or had been removed in anticipation of replacement and simply forgotten.
To resolve this problem newer smoke alarms are supplied with ten year batteries and can be hardwired to the homes electrical system.
Hardwiring and interconnection is a code requirement of new construction in most areas. This presents far more time to get your family safely away from the house in the event that becomes necessary.
A licensing requirement for Baltimore County rental properties requires hardwired and interconnected smoke alarms regardless of the age of the property. Since many of these properties will be retrofitted for smoke alarms the wiring requirement becomes much simpler by the use of ‘radio linked’ alarms.
Combination alarms that detect carbon monoxide (CO) gases as well as smoke are available to accommodate homes that require them. Interconnection provides the same advantage of time as do the smoke alarms.
Don’t become a statistic. Install a smoke alarm if your home does not already have one. Become familiar with how it works and how to test and service it.
October 12, 2016 in Home Inspection, Home Safety
Tagged building codes, Electrical, fire inspection, fire safety, Home Inspection, home safety, house wiring, interconnected, smoke alarms
Many of us are familiar with the poisonous fumes of automobile exhaust as carbon monoxide. One carbon atom joined to one oxygen atom its molecular abbreviation is easily recognized as the letters CO.
Now before we go too far it’s important to recognize that CO is a colorless, odorless gas. Completely invisible it is not to be confused with the visible water vapor or oil smoke associated with car exhaust. Just as important is the fact that CO is a byproduct of incomplete combustion. Any combustion, so this includes any fuel burning device or appliance in your home.
Fuels that are most often burned inside the home are heating oil, natural gas, propane, wood, and some years ago coal.
The most obvious appliance to burn any fuel is the home furnace or boiler and if you heat your home with wood then a wood stove or fireplace. Gas cooking ranges and ovens can be fueled either by natural gas or propane as can be your water heater which might alternately be fueled by oil.
Did you know that your gas dryer’s combustion exhaust is vented through the same four inch duct as the moist air? It is essential here to use a metal foil duct.
For the most part all of these devices are vented through a chimney in some way to the outdoors. A negative pressure in the home or an equipment malfunction (flue damage) can occur which does not allow the combustion gasses from these appliances to vent properly. Should this happen a working CO detector can save your families’ life.
The place to put your CO detector is in the hallway outside the bedrooms or one in each bedroom. Yes, I know the furnace is not in your bedroom, but the time when you are most susceptible to CO poisoning will be when you are asleep. While you are asleep your air handler will distribute the CO, should any occur, to the various bedrooms. This might happen in either a heating or cooling situation, you will want the earliest possible alarm so you can move your family to fresh air (outside) and call someone to correct the problem.
Take a moment this evening to consider your homes fuel burning appliances. Install a CO detector, readily available at all the lumber outlets, outside of the sleeping areas for your families’ protection.
Visit me at: http://www.IndependentHomeInspectionMD.com for more information on this and other safety items in the home.
Posted in Home Inspection, Home Safety
Tagged carbon monoxide, CO, co alarm, co detector, combination alarm, detector, Home Inspection, home safety, IAQ, indoor air quality, smoke alarm