130 



The Florists^ Review 



OCTOBSR 14. 1920 



Greenhouse Heating 



Subscribers are invited to write the 

 editor of this department with regard to 

 any details of greenhouse heating that 

 are not understood. When information 

 is desired regarding the capacity of boU- 

 ers, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as the amount of glass in the side walls, 

 and the dimensions and general arrange- 

 ment of the greenhouses. It is often help- 

 ful, also, to have a sketch showing the 

 location of the houses. 



TO BURN OIL. 



I saw an article in The Eeview for 

 September 9 by William Hosteller on 

 oil burners. Could this be applied to a 

 7-section No. 746 Burnham hot water 

 boiler? I have 2,300 feet of radiation. 

 My fuel bill will amount to nearly $1,- 

 500, and I was thinking that if those 

 burners «ould be put' into a boiler of 

 this type- there might be a great saving 

 in the fuel bill. It is rather doubtful 

 if we can get fuel here this winter, 

 anyway. I assume that this refers to 

 kerosene oil burners. 



V. C. G.— N. D. 



Fuel oil burners may be used with 

 hot water heaters of all kinds, but of 

 course the size "of the burner must be 

 adapted to the size of the heater and 

 the amount of radiation to be supplied. 

 If properly installed, they will be found 

 a saving in labor, but whether they will 

 really be economical will depend upon 

 the relative cost of oil and coal. Except 

 in a small way, it would not be advisable 

 to use ordinary kerosene for heating 

 purposes. 



HOUSE CAN BE EXTENDED. 



I have a greenhouse which is 20x30 

 feet, seven feet high at the ridge and 

 three feet at the eaves. There is no 

 glass in the side walls. They are com- 

 posed of a double thickness of wood 

 with building paper between. The south 

 end is all glass, and the north end all 

 wood, with the boiler room for protec- 

 tion. I am figuring on running two 

 2-inch pipes along the ridge in each 

 house for flows, and the returns are to 

 be two li^-inch pipes under each of the 

 four benches. This makes a total of 

 four 2-inch pipes twenty-five feet long 

 and eight IVo-inch pipes, twenty-five 

 feet long in all. I have a Lord & Burn- 

 ham boiler rated at 750 square feet of 

 radiation and 1 should like to know if 

 the piping arrangement which I am plan- 

 ning will maintain a heat of 50 to 60 

 degrees in weather 10 degrees below 

 zero. I should like to know, as well, 

 how many feet of radiation this plan 

 will require. If it would not be satis- 

 factory, please suggest an arrangement 

 of piping which would suit. 



F. B. R.— Mich. 



The plan suggested would supply the 

 needed amount of radiation, but it 

 would be preferable to have a larger 

 proportion under the benches, instead 

 of at the ridges of the two houses, es- 

 pecially as there will be less than 250 

 s<iuare feet of radiation to be supplied, 

 including all mains and connecting pipes. 

 I should suggest that for each of the 

 two houses, 10x30 feet, one 2-inch flow 



/-I 



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