OK this is probably going to get long but here goes.
New boiler put in 3 years ago. House is only about 1500 Sq. ft. English colonial built 1935 near Boston MA. Presently no insulation in walls (plaster). Heat is forced hot water, gravity system converted to forced hot water with 1 zone and circulator when the burner was replaced.
Concern is the boiler room venting (I enclosed it during a basement remodel last year) and overall air quality. Boiler Room is about 11 ft. by 7 ft. and also contains a gas water heater, Furnace is oil. No venting presently but there is a window which could be used to get outside air.
I recently had a home energy audit done and I can get the walls insulated (blown in cellulose) through Nstar contractors for about $2100, estimated savings $400/yr. Nstar also has a rebate program which will rebate 50% of the $2100. So it seems like a no brainer. Attic in the house has about 6 inches of fiberglass unfortunately under a tongue and groove floor (so additional insulation there is a major project) This is also my only storage space as I don’t have a garage. I may go ahead and foam the roof as well given the floor insulation situation up there.
Now the issues. As I’m tightening up the building I’m getting more concerned about combustion air in the basement and indoor air quality overall. During the energy audit they checked the boiler and hot water tank for CO and efficiency, Neither was a problem for CO and the oil burner was running at 86%. I still want to make sure under a constant load and when running more often the boiler is running properly. Last year when I asked the boiler technician about the venting issue he said well let’s see how things work and we can address it if there is a problem (Ahh not the response I was looking for). I’ve switched companies this year and haven’t had anyone in yet from the new place. So before I do.
Questions what is the proper way to ventilate this boiler room as well as the rest of the house? I’ve looked at some ERV and HRV (Aprilaire) units but it seems everything is geared towards a house with a central air setup, forced hot air or installing ductwork throughout the entire house which is not an option (we’re not talking a lot of open closets or wasted space to run new ducts). I figure I could install a unit in the attic for the upstairs bedrooms (in fact we’ve considered this for central air in the future) but there is no way to get the same unit to ventilate the first floor never mind the basement without ripping out walls and such which ain’t going to happen.
so what kind of alternatives do I have? Anyone have any great ideas because I’m really at a loss on this one