108 



The Florists Review 



December 5, 1912. 



WILKS 



Hot Water Boilers 



Alt THE MOST ECONOMiai 

 BOILtR FOR GREENHOUSES 



No NIsht FIraman Raqulrad with our 



SELF-FEEDING 



HOT WATER BOILERS 



Send for Catalotrue and prices. 



S. WILKS MFG. CO. 



3803 ShtoMs Av«., CHICAOO 



Mention The Rerlew when you write. 



Greenhouse Heating. 



AN UNEVEN TEMPERATTJEE. 



Is there any method of heating a 

 greenhouse, about 17x112, to a unifo™ 

 temperature from end to end! The 

 house has 4-foot board sides, with glass 

 in one end to the eaves. The boiler 

 is in a pit, eighteen inches below the 

 greenhouse floor. We are using 1%- 

 inch pipe for returns. With overhead 

 flows, as at present, the boiler end of 

 the house is the cooler by several de- 

 grees. Can you suggest any remedy for 

 these conditions! The high end of the 

 flows is over the boiler. How many 

 tons of hard coal should be required to 

 heat two houses of the foregoing di- 

 mensions for five months to 50 or 55 

 degrees in this part of the state of 

 New York, where the outside tempera- 

 ture occasionally falls to 15 degrees 

 below zero? A. B. a. 



The data furnished are so scanty 

 that it is not possible to tell just what 

 has caused the diflaculty. It would be 

 particularly helpful to know the num- 

 ber and size of the flow pipes and the 

 number of the return pipes. From tbe 

 fact that the boiler end of the house 

 is the cooler, it would appear that tor 

 some reason the water in the return 

 pipes is also much cooler at that end 

 than at the farther end of the house, 

 and to correct the difficulty such 

 changes should be made in the system 

 as will secure a greater uniformity m 

 the temperature of the water in the re- 

 turn pipes. . , a 



The number and size of the flow pipes 

 affects the temperature of the water 

 in the returns, as if the flow pipes are 

 too small, or too few in number, the 

 water in the return pipes becomes cooled 

 to such an extent, before it reaches 

 the boiler, that an uneven tempera- 

 ture in the house results. The use of 

 too small pipes for the returns is even 

 more likely to be the cause of the 

 trouble. While 1%-inch and even 1J4- 

 inch pipes may be used for hot water 

 heating for short runs, or when the 

 boiler is several feet below the re- 

 turns, a poor circulation will result 

 when they are used in long houses with 

 open-tank systems, especially if the top 

 of the boiler is higher than the re- 

 turns. The circulation will be slow and 

 the water will be cooled before it 

 reaches the boiler, as the volume of 

 water in the small pipes is much 

 smaller, in proportion to the radiating 

 surface, than in the larger pipes. 



The house in question should have 

 at least four 2-inch flow pipes, or, bet- 



''j^e^roi£ 



Rrruroi traps 



SAVE THE MOST VALUABLE PART OF CONDENSATION-ITS HEAT. 



They automatically 



return all the condensa- 

 tion from the steam lines 

 directly to the boiler at 

 almost evaporation 

 temperature — less coal 

 is required to convert it 

 into steam again — hence 

 a great saving is effected. 



All sizes in stock or 

 immediate shipment. 



if* worth your whiio to 

 Invostisato "Datrolt" 

 Trap*. Bottar a*k for 

 Buiiatin No. 326-WF 

 NOW. 



American Blower Gompany 



DETROIT. MICH. ' 



U. S. A. 



Canadian Slrooco Company, Limited. Wlndgor. Ontario. Mannfactarere tor Canada. 



>/ HERE IT IS 



IKE ECONOMY AUTOMATIC CONDENSATIOII PUMP AND RECOVER 



Increases rapidity of circulation by drawing condensaUon 

 through the system, venting the air and returning water to 

 boiler at high temperature'. Eliminates snapping, pounding 

 and cracking In radiators and pipes. Comprises an ex- 

 pansion tank, automatic switch and centrifugal pump auto- 

 matically operated by electric motor. Easily Installed and 

 Increases the efficiency of either high or low pressure sys- 

 tem 60 per cent. Let us co-operate with you In solving the 

 most difficult problems and making Installations. Worth 

 many times its cost to any florist. Write us. 



THOMAS & SfflTH, Inc. "«-"c*H^ci^^r?^£."^*'' 



Tel. Monroe 6941-6942 



Mention The Review when you write. 



SUPERIOR 



BOILERS 



are Superior to any 

 otliers for heating: 

 Sfreenhouses. Write 

 for catalogue giving 

 detailed reasons why. 



Superior Machine & Bofler Works 



840-850 W. Superior St., CHICAQO 



Mention The Review wnen you write. 



Full Weight ^'Reading" 



Wrought Iron Pipe 



Sizes X-in. to 12-in. from stock 



FORD & KENDIQ CO. 



24th and Wood Sts., Philadelphia, Pa. 



Mention The Review when you writa. 



ter yet, three 2% -inch, unless a mercury 

 generator is put on to the system, in 

 which case three 2-inch pipes will 

 answer as flows. If the 1%-inch pipes 



The Kroeschell Boiler 



Was installed to heat over ten million 

 (10,788,0€0) square feet of glass during 

 the past five years. 



Send for 

 CATALOGUE 



The Kroeschell Boiler 



Will give you more heat with the same 

 piping required by other boilers, and 

 with less fuel. 



Kroeschell Bros. Co. 



444 W. Erie Street, 

 CHICAQO 



Mention The Review when you write. 



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