Navien Combo boiler?

[hammer49]

Hello to everyone
I have a question would a Navien combo boiler work in the north east of New York where it’s cold, on a 1570 square foot house with 2 x 4 construction insulated and double pane windows with 93 feet of baseboard total in two 2 zones.
The original oil burner needs to be replaced, and replacing it with a propane.
Thank you

 

[Fitter30]

Have any paperwork from when the boiler was serviced? Should have the size of nozzle and pressure. That will tell us how many btu's the burner was putting out. Nozzles are sized at 100 psi but they can run 140-160 lbs adjusted by who tunes the boiler.
93' of baseboard 57k btu's running 180°

 

[Sponsor]

 

[Breplum]

For sizing any HVAC it is necessary to do a load calculation and not just guess or use the prior equipment unless you are sure of all the granular details, which seems like you are not.
I have been happy with Navien but rarely see their combi units. Navien does not give much help to homeowners when problems arise. They only want to talk to pro's, which I frankly understand. Most other mfrs are way friendlier on telephone support.

 

[hammer49]

I thank You guys for the reply, one answer I see says that 93 feet of baseboard is only 57,000 BTU so does that mean if I get a boiler that’s bigger then 60,000 BTUs It will only put out 57000 BTUs a hour and maybe it will short cycle. This is correct.
Also, I really don’t need it for hot water. I was thinking that I would need a boiler that constantly circulates 180° to get the best BTUs out of the baseboard I have. also, should I have a gauge on the return side to tell what the water temperature is returning from the baseboard?
Thank you

 

[hammer49]

I thank You guys for the reply, one answer I see says that 93 feet of baseboard is only 57,000 BTU so does that mean if I get a boiler that’s bigger then 60,000 BTUs It will only put out 57000 BTUs a hour and maybe it will short cycle. This is correct.
Also, I really don’t need it for hot water. I was thinking that I would need a boiler that constantly circulates 180° to get the best BTUs out of the baseboard I have. also, should I have a gauge on the return side to tell what the water temperature is returning from the baseboard?
Thank you

 

[Fitter30]

Any condenser boiler is only 93%+ efficient when the return water is 130° or lower. Above 130° 87%. Most baseboard design temp is 20° drop between the supply and return. They do make low temp baseboard. There are different manufacturers.

https://www.google.com/url?q=https://www.sterlingbaseboard.com/documents/DL-SG-1.pdf&sa=U&ved=2ahUKEwjCianEp9-VAxWM_8kDHb79LW4QFnoECAQQAg&usg=AOvVaw1Nwm7QB-fbgHc8JeaOTZ2I