Knowledgebase
Welcome to the BTL Knowledgebase. Ever since we started lining ponds, creating covers, and helping people with their projects, we've gotten asked a lot of questions. Many of these questions are repeatedly asked, so we put together the BTL knowledgebase to help answer any questions you had about a particular subject. We are adding new questions every month, so continue to check back often!
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How deep is a geothermal well?
A geothermal well can vary significantly in depth and may even require multiple drilling sites before a suitable site is located.
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Is geothermal energy sustainable?
Geothermal energy comes from the natural heat of the planet emanating from magma layers thousands of feet thick.
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What is a greenhouse's heat sink?
A heat sink is a dense material that naturally absorbs heat during the daytime and gradually releases it in the cool evening.
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What's a geothermal heat pump?
A geothermal heat pump is a specialized piece of equipment that typically uses warm water from underground aquifers to absorb heat and transfer it to a space like a greenhouse or a residence.
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Can you heat a greenhouse from the ground?
Yes! Geothermal greenhouses harness the natural warmth of the earth to supply heat directly to the greenhouse.
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How do you heat a greenhouse without electricity?
Passive geothermal greenhouses can take advantage of physical principals like the thermal flywheel to transfer heat from underground.
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What's the best soil for geothermal?
Moderaly dense, moist soils easily transfer heat and therefore make the best soil type for geothermal greenhouses.
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How do you heat a geothermal greenhouse?
There are several ways to heat a greenhouse using passive geothermal principles, and greenhouse operators typically aren't shy to supplement with no-tech, passive thermal batteries charged by exposure to the sun.
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How do you size a geothermal system?
Typically, an engineer will help you calculate an average heat load for your particular home or structure. This heat load will determine how much heat, on average, needs to be supplied to your home to keep it within the desired range.
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How does a geothermal greenhouse work?
Geothermal greenhouses work by transferring naturally occurring underground warmth into the greenhouse using circulating air.
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What are the advantages of geothermal energy?
Geothermal energy is cost effective, completely sustainable, and emits virtually no pollution.
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What are the disadvantages of geothermal energy?
Geothermal energy is available pretty much all over the globe, is free and is completely sustainable.
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How do you build a geothermal greenhouse?
Most geothermal greenhouses are built using a passive system, which may be augmented with fans or even a heat pump if necessary.
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Can you heat a house with geothermal?
Houses can be heated geothermally by pumping cold air above-ground through pipes to soil several feet underground, where the temperature is constant year-round. This heats the air before pumping it back into the house.
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How much does a geothermal greenhouse cost?
The cost of a mostly passive geothermal greenhouse will depend on the size of the greenhouse(s) and somewhat on the topography of the land.
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How deep does a geothermal greenhouse need to be?
Using passive geothermal heat, pipes are generally buried 6-8 ft below ground, depending on the climate.
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Are seasonal nursery ponds better?
Seasonal nursery ponds allow for time for the pond to rest between each stage of new fry, preventing unwanted algae and fish from getting a foothold, and helping remove unwanted toxins.
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What liner do you use in a seasonal nursery pond?
A seasonal pond will be exposed to UV light and frequently changing temperatures during the off-season, a natural clay bed or concrete liner will crack and lose durability during this time.
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What should you line a seasonal pond with?
A seasonal pond will be exposed to UV light and frequently changing temperatures during the off-season, a natural clay bed or concrete liner will crack and lose durability during this time.
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How do I line a nursery pond?
Liners are necessary for any permanent body of water, and are especially useful to maintain water levels and quality within nursery ponds.
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How do I change the water in a nursery pond?
Nursery pond water is changed by removing around 10% of the water within each or every other week, and then replacing it with clean water.
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Whats the best kind of nursery pond to use?
The best kind of nursery pond for your design will depend on how many fish you want to raise at once, and how much space and money you have to invest.
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What is the best material for a nursery pond liner?
Reinforced polyethylene, or RPE, is a popular investment in order to assure watertight seals and safe, clean water. This material is lightweight, resistant to tears or damage, and easily manufactured in custom shapes or sizes.
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