116 



The Florists' Review 



Adgost 26, 1920 



Greenhouse Heatini! 



SIZE OF BOILEB. 



I would appreciate some advice on 

 the sketch I am sending you. The 

 residence is a 2-story brick building 

 with basement; the greenhouse will be 

 on a level with the basement, against 

 the southwest end of the residence. I 

 want to heat it with hot water. What 

 size of boiler will I need, and what size 

 of pipes! Where should the supply tank 

 be placed? I want to heat to 60 de- 

 grees when it is 10 below zero. I 

 want to place the boiler in the base- 

 ment nearest the greenhouse. There 

 is one outside entrance. There are 4- 

 foot walls of concrete on the sides, with 

 two feet of glass and a 4-foot concrete 

 wall across the southwest end. 



M. D.— Ind. 



The sketch shows the greenhouse to 

 be 30x50 feet, with a door in the side 

 wall near the north end. It will be 

 well to use five 2*r^-inch flow pipes, 

 placing one upon each plate, one under 

 each purlin and another three feet below 

 the ridge. Connect these at the farther 

 end of the house with fourteen 2-inch 

 returns. Place two returns in the coil 

 to be supplied by the middle flow pipe 

 and three in each coil to be supplied 

 by the other flows. 



If preferred, four flows might be used 

 with fifteen returns, but this would not 

 give as even a distribution of heat as 

 when five flows are used. On the side 

 where the door is located, it will prob- 

 ably be best to have the end of the coil 

 on the south side of tl^e door. 



Connect the flow pipes at the highest 

 point, which should be near .the heater, 

 with the pipe leading to the tank, which 

 should be located as high as possible 

 in the residence or under the ridge of 

 the greenhouse. 



HEATIKO NEW HOUSE. 



I am enclosing particulars regarding 

 a new house which I want to heat. 

 Please give me full information. 



H. L. H. — Kan. 



The sketch indicates that the house 

 is 22x50 feet, with four feet of glass 

 and four feet of stone in the side walls. 

 The south wall also has glass above a 

 4-foot wall. The office building forms 

 the north wall of the greenhouse. No 

 indication is given of the temperature 

 desired, or of the use to which the 

 greenhouse is to be put, but we infer 

 that a temperature of 60 degrees will be 

 needed when the outside temperature is 

 10 to 15 degrees below zero. 



There appear to be two doors in the 

 east wall, which will prevent running 

 a coil on that side, but the plan seems 

 to include one greenhouse to be built 

 against that side of the house; a second 

 house probably will be constructed, 

 which would lessen the amount of ra- 

 diation required. 



To heat the house as described, you 

 should use four 2^-inch flow pipes, 

 running one upon each plate and the 

 others upon the purlin posts about two 

 feet below the sashbars. Use four 

 2-inch returns in the coils under the 

 west bench and three returns in each 

 coil under the middle benches. For 

 the east side it will probably answer if 

 a coil of four returns is run from the 



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