RGS
Member
Wondering between a Mitsubishi Mr Slim MSZ-FE12NA or MSZ-FE18NA which way to go.
I have a 170 (approx) year old 1 1/2 story house, post and beam construction built on a stone foundation with a cellar under about 1/3 of the first floor. No south windows. Unheated enclosed porch covers south side and unheated sun porch covers 2/3 of the west side.
Location about 4 miles inland from Port Hood, Nova Scotia with a mean January temperature of about -10C.
1st floor is open U shaped 625 sq ft with 7 ft ceilings. Walls are 8 to 9 inches thick. They had no installation when I moved here. I've since had insulation blown in along with 6 inches or so in the attic but there is no insulation under the floor - impossible to put any there. Metal roof. There are 7 windows on the first floor - 4 are double pane in wood frames and 3 are thermopane in vinyl frames. One of the 7 is a short window over the sink and the other six are 3 x 4 1/2 feet in size. Two windows face north and three east. The other two face west but one has the sunporch in between it and the outdoors so there's some protection from the wind.
Two outside doors - one to an unheated porch and the other to an unheated sunporch. One door to enclosed stairs to the 2nd floor. I've stopped as many drafts as possible in a house this old but there are still some, particularly around the floor. We have to bank the house every winter.
We've heated for the last 8 years with a Japanese Toyotomi Oil Miser stove burning about 150 gallons of oil a year at a cost of about $1000. We also have a wood burning stove that we often light in the afternoon and we burn about two cords of wood a year to supplement the oil stove. We don't heat the second floor (bedrooms and bathroom); enough heat gets up there to keep it tolerable and good for sleeping.
The Oil Miser (90% efficiency) has 3 outputs 22,000, 15,000, and 12,000 and steps down automatically as the room warms. It's done a remarkable job with this old house but it's 8 years old now and starting to show some problems. We plan to replace it with a Mitsubishi Mr Slim MSZ-E12NA or MSZ-FE18NA. The installer says a 1 ton will do the job but I'm leaning towards the 1 1/2 ton unit which should have an easier time when the colder temperatures arrive. Just a bit worried about its being too big and short cycling when the weather gets milder. Will also need a 40 foot line set which may affect things.
I understand that a Manual J is the way to go but no one knows how to do them around here. Does it sound as if a 1 1/2 ton would be a better bet?
I have a 170 (approx) year old 1 1/2 story house, post and beam construction built on a stone foundation with a cellar under about 1/3 of the first floor. No south windows. Unheated enclosed porch covers south side and unheated sun porch covers 2/3 of the west side.
Location about 4 miles inland from Port Hood, Nova Scotia with a mean January temperature of about -10C.
1st floor is open U shaped 625 sq ft with 7 ft ceilings. Walls are 8 to 9 inches thick. They had no installation when I moved here. I've since had insulation blown in along with 6 inches or so in the attic but there is no insulation under the floor - impossible to put any there. Metal roof. There are 7 windows on the first floor - 4 are double pane in wood frames and 3 are thermopane in vinyl frames. One of the 7 is a short window over the sink and the other six are 3 x 4 1/2 feet in size. Two windows face north and three east. The other two face west but one has the sunporch in between it and the outdoors so there's some protection from the wind.
Two outside doors - one to an unheated porch and the other to an unheated sunporch. One door to enclosed stairs to the 2nd floor. I've stopped as many drafts as possible in a house this old but there are still some, particularly around the floor. We have to bank the house every winter.
We've heated for the last 8 years with a Japanese Toyotomi Oil Miser stove burning about 150 gallons of oil a year at a cost of about $1000. We also have a wood burning stove that we often light in the afternoon and we burn about two cords of wood a year to supplement the oil stove. We don't heat the second floor (bedrooms and bathroom); enough heat gets up there to keep it tolerable and good for sleeping.
The Oil Miser (90% efficiency) has 3 outputs 22,000, 15,000, and 12,000 and steps down automatically as the room warms. It's done a remarkable job with this old house but it's 8 years old now and starting to show some problems. We plan to replace it with a Mitsubishi Mr Slim MSZ-E12NA or MSZ-FE18NA. The installer says a 1 ton will do the job but I'm leaning towards the 1 1/2 ton unit which should have an easier time when the colder temperatures arrive. Just a bit worried about its being too big and short cycling when the weather gets milder. Will also need a 40 foot line set which may affect things.
I understand that a Manual J is the way to go but no one knows how to do them around here. Does it sound as if a 1 1/2 ton would be a better bet?