more btu's

[tythib]

I have a mesys boiler rated for 109,000 btus but this boiler comes shipped from the factory set at 85000. the reason for the is because that size boiler comes in those two sizes. I have had issue with the boiler not keeping up with the demand. just a question about how big a difference the 24000 extra btus will be when I turn it up to that. is there a comparison?

 

[Wisneaky]

I have a mesys boiler rated for 109,000 btus but this boiler comes shipped from the factory set at 85000. the reason for the is because that size boiler comes in those two sizes. I have had issue with the boiler not keeping up with the demand. just a question about how big a difference the 24000 extra btus will be when I turn it up to that. is there a comparison?

I'd say a good difference. The extra 24k btu can heat about 700 more square feet.

 

[tythib]

the house is 1700 sq feet set at 70dg and the garage is 900 sq ft at 55 dgs. It is heated through the slab by mixing valves and controlled by the outdoor reset.

 

[Wisneaky]

the house is 1700 sq feet set at 70dg and the garage is 900 sq ft at 55 dgs. It is heated through the slab by mixing valves and controlled by the outdoor reset.

If your boiler won't keep up with demand, more btus is what you need.

 

[heaterman]

What did you heat with previous to the pellet boiler and what input rating did it have?

 

[tythib]

brand new house. first system

 

[heaterman]

So roughly 2600 sq ft of new construction? If it's done to normal standards the heat loss should be in the 20 btu/sq ft range so 55-60,000 tbu should be all you need.

Wondering why it might be higher than that?

 

[davem3261]

Try lowering the heat in the garage to 45. I used to heat my garage all the time to 50. It stays mid 40's most of the time with the heat off. Got as low as 38 when it was -5 at night. You garage heat won't cycle very often that way.

 

[tythib]

my biggest worry with keeping it that low is having something freeze up in the slab.