PDA

View Full Version : Adding A/C, should I replace boiler with forced air at same time?



MilwaukeeTru
05-05-2012, 09:49 AM
I just purchased my first house a couple weeks ago. It is a 50 year old tri-level in the Milwaukee, WI area. There is one bedroom in the entry level, living/dining/kitchen on second, and four bedrooms on the third level. 2,000 sq. ft above grade. Additionally there is a 570 sq. ft. basement with laundry, tool bench and water/heat appliances.

The house is heated by a 26 year old gas boiler. It is a Burnham Series 2. Model number P-205-WI. There are two BTU ratings on it, I'm not sure what they mean, but here they are:
Water BTU/HR: 93,000

Input BTU/HR: 130,000

The second and third floors are heated by baseboard radiators, and the entry level has radiant heat in the floor. I think the basement is just heated by nature of having the boiler in it and radiating heat off all the copper pipes.

When I can get the money (in about a year), I'd like to add central air to the house. Currently there is no cooling, so we are using window units. I am wondering if I should add a forced air furnace at the same time, since ducting will need to be added for the A/C. I haven't lived in this house through a winter yet, but I know the boiler is working. I don't know how much life I should expect out of it. Perhaps when I add the A/C I should just add the ducting for a future forced air unit once the boiler dies?

The reason I prefer forced air over a boiler is the baseboard radiators. I'd prefer ducts in the walls. Currently there is no room where I can put furniture against the exterior walls, because of the radiators. This is a problem especially in the upstairs bedrooms, which are roughly 11' x 12'. With a queen bed and two dressers, all pulled away from the exterior walls, there's just enough room to walk around the furniture.

I'm not sure what this project will cost, I have yet to bring in professionals for estimates. I'd imagine that adding a forced air furnace is cheaper than replacing a boiler furnace. I'm also not sure if a forced air furnace can use the same ducts as A/C. I've heard about high velocity A/C ducts which are smaller and easier to install, would a furnace be able to use those as well?

I appreciate any and all advice, thanks!

kangaroogod
05-05-2012, 06:25 PM
Without seeing your home it is difficult but I assume you do not have ductwork now? Adding ductwork is often difficult without major renovations if you want to have 1 system. If your primary concern was cooling only then I would suggest ductless mini splits. They can heat your home as well. I would have a contractor visit your home and he can give you your options after seeing the footprint of your home.

MilwaukeeTru
05-05-2012, 07:33 PM
You are correct, there is currently no ductwork. Where is a good place to learn about "ductless mini splits"? That's not a term I am familiar with.

Also, how much more life should I expect out of the boiler? I don't want to replace it if it has another decade or so left in it. It's another story if it is approaching end of life.

Thanks!

kangaroogod
05-05-2012, 07:42 PM
There are several manufacturers. Mitsubishi is probably the most common. We installed About a hundred or so systems last year and have fantastic luck with them. You can google "Mitsubishi air conditioners". As for your existing boiler, 26 years could be mid life or elderly depending on maintenance and original installation practices. I would schedule a routine service on your boiler as it should be done annually. That would be a good time to speak to the tech about your options. I am not sure where you are located but searching the contractor map on this site would be a good start.