Greenhouse construction and heating
In ranges containing less than 20, 000 square feet of glass hot-water systems are usually looked upon as best, while for larger plants steam is believed to be more economical. ... However, within the past few years the use of forced-circulation hot- water systems has brought about results ... the boiler, so that the water flows downhill for the entire distance through the house, as brought out in the diagram.
| Title | : | Greenhouse construction and heating |
| Author | : | James H. Beattie |
| Publisher | : | - 1952 |
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