120 



The Florists' Review 



Sei'tember S, 1921 



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 rejjarding the capacity of boil- 

 ers, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as tlie amount of glass in the side walls, 

 and the dimensions and general arrange- 

 ment of the greenhouses. It is often 

 helpful, also, to have a sketch showing 

 the location of the houses. 



BOILER AND PIPING. 



1 have a greenhouse 20x75 feet. It 

 is ton feet to the ridge and has 4foot 

 side walls. There is two feet of glass 

 in the south wall. On the west side is 

 a basement, 24x26 feet, where I am 

 planning to place the boiler, which is 

 for hot water. Over the basement are 

 the storeroom and offices, which I want 

 to heat at the same time. I desire to 

 heat the greenhouse to 00 degrees. The 

 outside temperature drops sometimes to 

 •40 degrees below zero. What size of 

 boiler will be needed and how shall I 

 arrange the piping? I shall burn soft 

 coal. I am planning on one more green- 

 house, ^4x1(10 feet. Would it be wise 

 to install a boiler large enough to heat 

 both houses? P. V.— N. D. 



It would be advisable to use about 

 4,00(i square feet of radiation to heat 

 the two houses described, together with 

 the store and offices, and unless the sec- 

 ond house is to be built within a year 

 or two, it would be well to put in a boiler 

 only larg(! enough to handle one house, 

 adding the other when the 34xl00-foot 

 house is constructed. For use with soft 

 coal, it would be advisable to use a 

 boiler rated for at least o,000 square 

 feet of radiation for each house. Dur- 

 ing the spring and fall and during mild 

 weather in tlie winter one boiler would 

 answer for both houses and the other 

 could be held in reserve for use when 

 the mercury drojis to the extremely low 

 temperature mentioned. 



For piping the house that is 20x75 

 feet, it would be well to use five 2%- 

 inch flow pipes, placing one on each 

 side-wall jjlate, one three feet under the 

 ridge, and the others on the purlin 

 posts. To serve as return pipes, pro- 

 vide five coils, each containing four 

 2-inch pipes, each coil to be supplied by 

 one of the How pipes. One of the coils 

 can be under each of the side benches, 

 one on each of the purlin posts, and the 

 other on tlie posts which support the 

 ridge. If these posts stand in the walks, 

 the returns may be on the sides of the 

 beds. For the other house use five 

 3-inch flows and thirtv 2-inch returns. 



INSTALLING A SYSTEM. 



My greenhouse is 18 x 100 feet and 

 faces east and west, with no windbreak 

 at tlie north. The side walls are six 

 feet high, with three feet of glass. 

 What arrangement of pipe would it be 

 advisable to use to heat this house 

 with hot water to a temperature of GO 

 degrees when the temperature outside 

 is 10 degrees below rezo? I should like 

 to have the return pipes underneath 

 the two side benches, if it is practical. 

 I am extending the boiler slied to the 



This Winter? 



This winter when the wind whistles around your 

 glass and the thermometer outside falls awaj'' down 

 low, will you be able to sit back in your easy 

 chair with your mind free of all worry about the 

 temperature in your greenhouses? They say it's 

 going to be a mighty cold winter, so if your heating 

 system isn't in tip-top shape you better do your 

 worrying right now and get prepared. 



If you are not sure about your boiler, don't take 

 a chance on trying to make it pull through this 

 winter. Get a new one and save yourself a lot of 

 trouble and money. 



A Kroeschell Boiler for Hot Water or Steam will 

 protect your stock in all kinds of weather. It will 

 always maintain growing temperatures without 

 wasting any coal. It can be depended on to keep 

 your houses properly heated without fear of break- 

 down. 



Protect yourself against trouble in the coming cold 

 weather. Install a Kroeschell Boiler and enjoy the 

 same satisfaction as hundreds of other growers who 

 are using Kroeschells. 



Eneineering Advice and Quota* 

 tions cheerfully submitted— 

 Let us know your requirements 



WHEN YOU BUY -GET A KROESCHELL 

 "THE BOILER OF UNEQUALED FUEL ECONOMY' 



KROESCHELL BROS. CO. 



444 W. Eri* Street 



CHICAGO, ILL. 



