Having been doing a lot of reading, Saw this DIY forum. Reading a lot. Some great opinions and experts here. Now I finally have a question to throw out.
Looking to replace an existing 23 year old York gas furnace. Have done the research. Narrowed it down to the top three; Carrier Infinity 96, Trane XV90 and Lennox G61V. All good, but leaning likely towards the Lennox. Well serviced brand where I am, and on paper the better warranty; 10 years and Lifetime Heat Exchanger. FYI I am in the Toronto, Ontario Canada area.
Have focused on good reputable installers for quotes. However most of the installers that have come in to quote, have just looked at the current furnace, and ask how the current heat is. FYI the current York is an 80,000 BTU Normal Input spec, with a 60.8 BTU rated Output.
However two installers did a "heat loss calc".
My issue now is this. I have had two Lennox installer in, and both quoting a different size hi-eff: G61MPV-36B-070 and G61MPV-36C-090. The house is approx. 2,800 sq ft.
Now this is what I am trying to understand. Both did the walk around, measured floor space, counted windows, and then went off to another room to do their calcs. When they came back one said the calculation came out to 62,400, the other 64,000. Close I guess.
What I do not understand, but want to, is what does this mean? Specifically trying to understand how this type of number relates to sizing a furnace.
Can anyone comment on this? I am not looking to become an HVAC engineer, but am very interested in understanding what type of sizing of a furnace we should be looking at. Just want to be more educated, and keep the installers honest. Want to make sure that the furnace is not undersized or oversized.
Also not sure how these type of numbers relate to the hi/low stages and outputs of the current hi-eff furnaces.
Also ifanyone has any opinions on the three considered products, I'd welcome that too
If there is another link I can go to to help learn a bit more, then all comments are welcome.
Thanks to all in advance for your feedback.
Looking to replace an existing 23 year old York gas furnace. Have done the research. Narrowed it down to the top three; Carrier Infinity 96, Trane XV90 and Lennox G61V. All good, but leaning likely towards the Lennox. Well serviced brand where I am, and on paper the better warranty; 10 years and Lifetime Heat Exchanger. FYI I am in the Toronto, Ontario Canada area.
Have focused on good reputable installers for quotes. However most of the installers that have come in to quote, have just looked at the current furnace, and ask how the current heat is. FYI the current York is an 80,000 BTU Normal Input spec, with a 60.8 BTU rated Output.
However two installers did a "heat loss calc".
My issue now is this. I have had two Lennox installer in, and both quoting a different size hi-eff: G61MPV-36B-070 and G61MPV-36C-090. The house is approx. 2,800 sq ft.
Now this is what I am trying to understand. Both did the walk around, measured floor space, counted windows, and then went off to another room to do their calcs. When they came back one said the calculation came out to 62,400, the other 64,000. Close I guess.
What I do not understand, but want to, is what does this mean? Specifically trying to understand how this type of number relates to sizing a furnace.
Can anyone comment on this? I am not looking to become an HVAC engineer, but am very interested in understanding what type of sizing of a furnace we should be looking at. Just want to be more educated, and keep the installers honest. Want to make sure that the furnace is not undersized or oversized.
Also not sure how these type of numbers relate to the hi/low stages and outputs of the current hi-eff furnaces.
Also ifanyone has any opinions on the three considered products, I'd welcome that too
If there is another link I can go to to help learn a bit more, then all comments are welcome.
Thanks to all in advance for your feedback.