Do a routine inspection, check the plumbing under the sinks, check the drains for free flow, check for running toilets, check the base of the toilet for leaking flange seal, dripping faucets, change the furnace filter, inspect the attic for potential roof leaks, check the condensate pan under the HVAC, check the pan under the water heater.Common sources of smells are pets (especially cats), kids peeing somewhere other than the toilet, garbage/refuse not being properly disposed of, plumbing issues.

MFH are out there, just not plentiful like in denser areas with condensed suburbias.

The water in the flue ... my guess is you installed high efficiency condensing heaters, that should be direct vented but instead they are being vented through the chimney.

I'm an organization nerd so I'm trying to condense all deals into 1 program enabling us to track communication, who is involved in it, things along those lines.

Usually, only heating oil USTs associated with commercial properties are regulated. thus, most home heating oil tanks may and often are taken out of service without any oversight from state regulators.Second- the rules that are in effect for heating oil tanks are usually less stringent than for diesel or gasoline tanks since heating oil tends to thicker and may not migrate as far. as a result, many states just require tanks to be cleaned out. they may also require the tanks to be filled with sand or concrete to prevent collapse. but sampling may not be required.Third- the key to determining if a tank has leaked is to collect soil samples from around and beneath the tank (groundwater also if groundwater is shallow). another quick way to see if a tank is leaking is to "dip" it with a stick that has a paste that turns color in the presence of water. generally, if water has gotten into a tank, it can mean oil has leaked out of the tank (although a certain amount of condensation may be present even where there is no leak so this is not a infallible test).Fourth- if there is currently a tank in the basement, ask the owner if there used to be a buried tank (a/k/a underground storage tank).Fifth, If the tank has impacted the soil, the cleanup generally varies from $25K to $50K though the costs will depend ont he depth of the contamination. i once had a home with a heated pool that had pressurized piping and used diesel. the contamination went down 40 feet and the consultant went crazy excavating the soil to the tune of $400K!!!

@Alex Svet what about the condensate drip pan...smells more musty than socks though imo.

Once, I left a can of sweetened condensed milk in a locker on a boat in Fl.

On the Hudforeclosed website, When I change the criteria and click update, it is like nothing happens because the results do not condense from 4,273 options.

That mold is going to be almost exclusively on the surface, since it's caused by condensation.

Just don't expect it to perform as well as your calculator says.One more piece of advice...if you are investing in C- / D areas and you install air conditioning, make sure you chain the condenser down.