Hi
I have a 4 story 18x34 house attached on both sides in Queens NY the back is in direct sunlight and doesnt need much heat at all, on a 30 degree winter day/night the radiators in the back rooms were closed and sometimes I had to open the windows a bit while the radiators in the front were open. I currently have a 3yr old 100k btu steam crown boiler running on oil. I am getting rid of the oil and steam and switching to gas and hot water. My biggest concern is what type of boiler to get to deal with 5 zones and avoid short cycling when only 2 or 3 of the zones will be running most of the time. I need to be able to zone the system with 5 zones to control things from the front of the house to the back and shut the 4th floor and basement that dont get used much and I plan on running indirect DHW of the boiler as well.
I imagine based on the current state of things that only 2 or 3 zones will be running most of the time, but if a I get a boiler large enough for all 5 zones + the indirect DHW the result would be frequent short cycling for the 2/3 zones normally in use.
From my research the obvious answer would be a mod/con boiler - however most of the ppl I spoke to said to stick with a regular cast iron (large mass i guess) boiler b/c of the extra headache and downtime involved in parts for the mod con boilers.
So my question is - Is there anyway to setup a regular cast iron boiler (right now I am looking at a Williamson 140k) to be able to handle all 5 zones + DHW when it needs to but also work well for just the 2/3 zones without short cycling. I saw a comment in another post about the intellicon economizer which sounds like it would help. Any other suggestions ?
Thanks
I have a 4 story 18x34 house attached on both sides in Queens NY the back is in direct sunlight and doesnt need much heat at all, on a 30 degree winter day/night the radiators in the back rooms were closed and sometimes I had to open the windows a bit while the radiators in the front were open. I currently have a 3yr old 100k btu steam crown boiler running on oil. I am getting rid of the oil and steam and switching to gas and hot water. My biggest concern is what type of boiler to get to deal with 5 zones and avoid short cycling when only 2 or 3 of the zones will be running most of the time. I need to be able to zone the system with 5 zones to control things from the front of the house to the back and shut the 4th floor and basement that dont get used much and I plan on running indirect DHW of the boiler as well.
I imagine based on the current state of things that only 2 or 3 zones will be running most of the time, but if a I get a boiler large enough for all 5 zones + the indirect DHW the result would be frequent short cycling for the 2/3 zones normally in use.
From my research the obvious answer would be a mod/con boiler - however most of the ppl I spoke to said to stick with a regular cast iron (large mass i guess) boiler b/c of the extra headache and downtime involved in parts for the mod con boilers.
So my question is - Is there anyway to setup a regular cast iron boiler (right now I am looking at a Williamson 140k) to be able to handle all 5 zones + DHW when it needs to but also work well for just the 2/3 zones without short cycling. I saw a comment in another post about the intellicon economizer which sounds like it would help. Any other suggestions ?
Thanks