Ridgeline engineering press (20 resultados)

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condición: new. Paperback. A duct size can be locally correct and still belong to a poor system. The same bedroom can be starved by an undersized branch, a blocked return path, a loaded filter, a restrictive coil, the wrong blower setting, a closed door, or leakage outside the boundary you thought you were testing. Changing the visible part before the whole path has been mapped is how good money gets spent on the wrong fix.Most residential duct failures are not bad arithmetic. They are a skipped link. A trunk is sized from a guessed tonnage instead of a room load. A fan table is read at the wrong speed or pressure boundary. A filter or coil is counted twice, or not at all. Straight length is mistaken for effective length. Every branch is sized at the same airflow. Flex is selected stretched and installed compressed. The design looks complete while its evidence chain is broken.The Residential Duct Design Handbook rebuilds that chain in eighteen chapters across five parts, from room load to commissioned system. It treats the duct system as one air circuit joined to a fan, coil, filter, terminals, rooms, and doors, and it shows how loads, exact equipment data, a pressure budget, complete supply and return paths, total effective length, a derived friction rate, section sizing, construction details, control states, and field measurements must all agree before a system is finished.Inside, you will learn how to: Build a safe airflow and static-pressure diagnostic map on one page, separating the homeowner observation lane from qualified measurement work.Turn room loads into a reconciled airflow schedule, read blower tables at the right setting, and lock a design airflow the equipment can actually deliver.Calculate total external static pressure from signed readings, budget every component loss exactly once, and derive available static pressure without double subtraction.Measure developed paths, count fittings by actual geometry, find the critical path, and convert available pressure and effective length into a defensible friction rate instead of a universal rule of thumb.Size round, rectangular, flat-oval, and flexible duct at installed conditions, reduce trunk airflow after each takeoff, and check every terminal path against the budget.Design returns that work with closed doors, select grilles, registers, and diffusers from throw and sound data, and carry the design through zoning, variable-speed equipment, heat pumps, and ducted mini-splits in every operating state.Inspect rough-in by critical path, test leakage, measure airflow and pressure with stated uncertainty, balance proportionally, and hand over a package another qualified person can audit.Fifty-five worked examples carry every calculation to a boxed answer. Ninety practice problems are solved in full. All 143 numbered equations are collected in one appendix with their variables, units, and boundaries. Ninety-one figures, more than one hundred tables, six project forms, duct sizing tables, a troubleshooting quick reference, and a subject index support work at the desk and in the crawl space. Four complete cases, a new home, an existing home, a zoned heat pump, and a noise complaint, show the method end to end.Written for HVAC contractors, installers, service technicians, duct designers, commissioning and balancing providers, inspectors, apprentices, and technically engaged homeowners who want to know what qualified work should produce. The workflow follows United States residential practice in inch-pound units with SI equivalents, and an appendix maps units, terminology, and local pathways for Canada, the United Kingdom, Australia, and New Zealand.Stop guessing at the trunk size and start proving the whole path. Click the " Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condición: new. Paperback. For most of the twentieth century a technician could learn one refrigerant, learn the pressures that went with it, and carry that knowledge for a working lifetime. That is no longer possible.The chlorinated fluids were withdrawn. The high global warming potential fluids that replaced them are being withdrawn in turn, and the fluids taking their place are mildly flammable. A cylinder on a truck today may hold a blend of five components with a temperature glide that punishes anyone who charges it as vapour. A rooftop unit installed this year is likely to carry a refrigerant that did not exist commercially when the technician servicing it began an apprenticeship.Meanwhile the same technician is asked to charge a residential split system, diagnose a communicating control, and work out why a walk-in freezer will not pull down. Procedure-only training fails here, because a procedure works on the system it was written for and a mechanism works on all of them.This handbook is built on that division. The physics comes first and is treated as permanent. The fluids, the regulations and the equipment come second, and are treated as things to verify rather than memorise; where a rule is likely to change, the principle behind it is given alongside the rule.What you will take from itThe ability to read a system from two gauges and two thermometers whatever fluid is inside it, including glide, dew point and bubble point, and why superheat is read against one column and subcooling against the other.A diagnostic order that does not change - listen, look, electrical, airflow, refrigerant, confirm - and the reason airflow must be measured before any refrigerant reading is interpreted.The superheat and subcooling grid that places a fault on one side of the metering device, and the pressure patterns that separate a compressor fault from an air-side fault.Airflow measured properly by traverse, flow hood, anemometer, blower table or temperature rise, with external static pressure partitioned among filter, coil, return and supply.Electrical method: voltage in parallel with power on, current clamped around one conductor, resistance on an isolated device with power off - and always the question of what destroyed the component you are replacing.Installation that does not fail later: nitrogen flowing through every brazed joint, a dry-nitrogen pressure test, evacuation to five hundred microns proved by a decay test, and charging by the method the metering device requires.One hundred and sixteen worked examples with every arithmetic step and unit shown, and more than a hundred and forty practice problems answered with the reasoning, not just the result.Fifteen chapters run from heat and the vapour-compression cycle through working fluids, compressors, heat exchangers, metering devices and piping, then psychrometrics, duct design and airflow, electrical fundamentals and controls, heat pumps, and commercial and industrial refrigeration, closing with installation practice and systematic fault diagnosis. Three appendices give saturation and glide tables, every numbered equation in one place, and a field quick reference of target values, pressure patterns, electrical checks and safety rules. A glossary of roughly one hundred and ninety terms and a full index complete it, with units given in both systems throughout.It is written for the working technician sent from one generation of equipment to another, the installer whose callbacks begin at commissioning, the apprentice learning the reasons behind the steps, and the trade-school or two-year student with an examination to pass and a first year in the field to survive.Open it at the first chapter and start building the understanding that outl Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Paperback. Condición: new. Paperback. A duct size can be locally correct and still belong to a poor system. The same bedroom can be starved by an undersized branch, a blocked return path, a loaded filter, a restrictive coil, the wrong blower setting, a closed door, or leakage outside the boundary you thought you were testing. Changing the visible part before the whole path has been mapped is how good money gets spent on the wrong fix.Most residential duct failures are not bad arithmetic. They are a skipped link. A trunk is sized from a guessed tonnage instead of a room load. A fan table is read at the wrong speed or pressure boundary. A filter or coil is counted twice, or not at all. Straight length is mistaken for effective length. Every branch is sized at the same airflow. Flex is selected stretched and installed compressed. The design looks complete while its evidence chain is broken.The Residential Duct Design Handbook rebuilds that chain in eighteen chapters across five parts, from room load to commissioned system. It treats the duct system as one air circuit joined to a fan, coil, filter, terminals, rooms, and doors, and it shows how loads, exact equipment data, a pressure budget, complete supply and return paths, total effective length, a derived friction rate, section sizing, construction details, control states, and field measurements must all agree before a system is finished.Inside, you will learn how to: Build a safe airflow and static-pressure diagnostic map on one page, separating the homeowner observation lane from qualified measurement work.Turn room loads into a reconciled airflow schedule, read blower tables at the right setting, and lock a design airflow the equipment can actually deliver.Calculate total external static pressure from signed readings, budget every component loss exactly once, and derive available static pressure without double subtraction.Measure developed paths, count fittings by actual geometry, find the critical path, and convert available pressure and effective length into a defensible friction rate instead of a universal rule of thumb.Size round, rectangular, flat-oval, and flexible duct at installed conditions, reduce trunk airflow after each takeoff, and check every terminal path against the budget.Design returns that work with closed doors, select grilles, registers, and diffusers from throw and sound data, and carry the design through zoning, variable-speed equipment, heat pumps, and ducted mini-splits in every operating state.Inspect rough-in by critical path, test leakage, measure airflow and pressure with stated uncertainty, balance proportionally, and hand over a package another qualified person can audit.Fifty-five worked examples carry every calculation to a boxed answer. Ninety practice problems are solved in full. All 143 numbered equations are collected in one appendix with their variables, units, and boundaries. Ninety-one figures, more than one hundred tables, six project forms, duct sizing tables, a troubleshooting quick reference, and a subject index support work at the desk and in the crawl space. Four complete cases, a new home, an existing home, a zoned heat pump, and a noise complaint, show the method end to end.Written for HVAC contractors, installers, service technicians, duct designers, commissioning and balancing providers, inspectors, apprentices, and technically engaged homeowners who want to know what qualified work should produce. The workflow follows United States residential practice in inch-pound units with SI equivalents, and an appendix maps units, terminology, and local pathways for Canada, the United Kingdom, Australia, and New Zealand.Stop guessing at the trunk size and start proving the whole path. < Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Paperback. Condición: new. Paperback. For most of the twentieth century a technician could learn one refrigerant, learn the pressures that went with it, and carry that knowledge for a working lifetime. That is no longer possible.The chlorinated fluids were withdrawn. The high global warming potential fluids that replaced them are being withdrawn in turn, and the fluids taking their place are mildly flammable. A cylinder on a truck today may hold a blend of five components with a temperature glide that punishes anyone who charges it as vapour. A rooftop unit installed this year is likely to carry a refrigerant that did not exist commercially when the technician servicing it began an apprenticeship.Meanwhile the same technician is asked to charge a residential split system, diagnose a communicating control, and work out why a walk-in freezer will not pull down. Procedure-only training fails here, because a procedure works on the system it was written for and a mechanism works on all of them.This handbook is built on that division. The physics comes first and is treated as permanent. The fluids, the regulations and the equipment come second, and are treated as things to verify rather than memorise; where a rule is likely to change, the principle behind it is given alongside the rule.What you will take from itThe ability to read a system from two gauges and two thermometers whatever fluid is inside it, including glide, dew point and bubble point, and why superheat is read against one column and subcooling against the other.A diagnostic order that does not change - listen, look, electrical, airflow, refrigerant, confirm - and the reason airflow must be measured before any refrigerant reading is interpreted.The superheat and subcooling grid that places a fault on one side of the metering device, and the pressure patterns that separate a compressor fault from an air-side fault.Airflow measured properly by traverse, flow hood, anemometer, blower table or temperature rise, with external static pressure partitioned among filter, coil, return and supply.Electrical method: voltage in parallel with power on, current clamped around one conductor, resistance on an isolated device with power off - and always the question of what destroyed the component you are replacing.Installation that does not fail later: nitrogen flowing through every brazed joint, a dry-nitrogen pressure test, evacuation to five hundred microns proved by a decay test, and charging by the method the metering device requires.One hundred and sixteen worked examples with every arithmetic step and unit shown, and more than a hundred and forty practice problems answered with the reasoning, not just the result.Fifteen chapters run from heat and the vapour-compression cycle through working fluids, compressors, heat exchangers, metering devices and piping, then psychrometrics, duct design and airflow, electrical fundamentals and controls, heat pumps, and commercial and industrial refrigeration, closing with installation practice and systematic fault diagnosis. Three appendices give saturation and glide tables, every numbered equation in one place, and a field quick reference of target values, pressure patterns, electrical checks and safety rules. A glossary of roughly one hundred and ninety terms and a full index complete it, with units given in both systems throughout.It is written for the working technician sent from one generation of equipment to another, the installer whose callbacks begin at commissioning, the apprentice learning the reasons behind the steps, and the trade-school or two-year student with an examination to pass and a first year in the field to survive.Open it at the first chapter and start building the understand Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Taschenbuch. Condición: Neu. Neuware.

Taschenbuch. Condición: Neu. Neuware.

Condición: New. Print on Demand.

Condición: New. Print on Demand.

Paperback. Condición: new. Paperback. Four hundred cubic feet per minute per ton. A constant of 1.08 on the air side and 500 on the water side. Every heating, cooling, and refrigeration technician runs on numbers like these - and almost nobody can say where they come from, or when they stop being true.That is because the trade's arithmetic is scattered: a sizing table here, a manufacturer's bulletin there, a slide chart on the back of a pressure-temperature card, a rule of thumb passed down a shop until nobody remembers what it was derived from. It works until the job leaves standard conditions - a duct run at altitude, an air handler in a hundred-and-forty-degree attic, a nameplate that mixes two measurement systems. The technician who has only memorized the number is stuck the moment the table runs out. And a wrong number in this trade is never an abstraction: it is an oversized furnace, a starved coil, a callback, a compressor that dies young.This handbook was built to close that gap. It gathers the calculations a technician actually performs - on a service call, at a start-up, during a replacement estimate - and works each one through from the physical relationship that produces it to the number written on the invoice. Where a shortcut exists, the derivation that justifies it comes first, along with the conditions under which it fails.What you will take from it: One conversion method that handles any unit conversion, including ones you have never seen beforeThe sensible, latent, and total heat equations - and how to correct their constants when conditions are not standardA complete heat loss and heat gain calculation, from design conditions to room-by-room equipment selectionAirflow verified by duct traverse and by temperature rise, the fan laws, and duct sizing by friction loss against available static pressureThe refrigeration cycle read from two gauges and two thermometers - superheat, subcooling, compression ratio, and charge limits for the newer mildly flammable refrigerantsCombustion arithmetic: clocking a meter, input, output, efficiency, temperature rise, and gas pipe sizingPump curves, glycol corrections, and expansion tanks on the water side; amperage, voltage drop, and power factor on the electrical side - through operating cost and simple payback.The apparatus is built for learning and for the truck: 141 fully worked examples showing the equation, the substitution, and the units at every step; more than 400 end-of-chapter practice problems, each answered with a complete worked solution; a master conversion appendix with exact factors; every equation in the book collected in one place; reference data tables; a field quick reference; and a glossary of roughly 190 terms. Chapters are self-contained enough to open anywhere and cross-referenced enough to read straight through. Units follow United States practice, with an appendix for working any calculation in the units used across the English-speaking world.It is written for the apprentice meeting this material for the first time, the trade-school or community-college student with an exam ahead, the working technician tired of trusting numbers he cannot check, and the estimator or service manager who checks them.Stop working from numbers you cannot verify. Get your copy and start carrying the arithmetic that holds up when the table runs out. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Condición: New. Print on Demand.

Condición: New. Print on Demand.

Paperback. Condición: new. Paperback. Every student pilot is told what to do. Very few are told why, and the difference shows up at the worst possible moment: on a warm afternoon at a high field when the airplane will not climb, or on the turn from base to final when a little bottom rudder feels like the obvious correction.Aerodynamics is usually taught as a list of facts to be memorized before a test and then set aside. Stall speed becomes a number on a dial instead of an angle the wing reaches. Density altitude, trim and load factor stay as separate rules rather than consequences of a handful of relationships that could be rebuilt in a minute. The result is a pilot who can pass the test and still be surprised by the airplane, and an instructor who can demonstrate a maneuver but struggles to explain it.This handbook was written to close that gap. Across seventeen chapters in five parts it explains why airplanes behave the way they do, with the reasoning shown rather than asserted, so that a reader who has understood a few relationships can derive the rest instead of remembering it. Every equation is followed by a definition of every symbol with its units, and every worked example carries the arithmetic through with the units shown.What you will take from it: The air before the wing: pressure, temperature and humidity as one working number, and density altitude computed on the ramp rather than discovered on the runway.Lift and drag as cause and cost: angle of attack, the coefficient of lift curve, parasite and induced drag, the total drag curve and the region of reversed command.The airplane as a machine: wing planform and high-lift devices, stability and the center of gravity, trim, adverse yaw, and the propeller's four left-turning tendencies taught separately.Performance you can compute: takeoff roll, best angle against best rate of climb, range and endurance in wind, best glide, the stabilized approach, ground effect, crosswinds and wake turbulence.The edge of the envelope: load factor, maneuvering speed and what it does not protect, the V-g diagram, the stall as an angle rather than a speed, slow flight, spins, the cross-control stall and the turn-back examined with numbers.Energy management as the single model that ties the subject together: altitude, airspeed and power as one budget, and the decision that has to be made early.A working apparatus: fifty worked examples, one hundred and nineteen practice problems every one solved in full in the answer key, and appendices covering symbols, a formula reference, V-speeds, the standard atmosphere and international units.Five recurring features in every chapter connect the physics to the cockpit and to the lesson, including an instructor's brief on how to teach and demonstrate each point and the misreading the topic reliably produces. Suggested reading routes cover stall and spin awareness, performance and flight planning, a flight review, and teaching.It is written for student pilots who want the reasons behind the procedures, for certificated flight instructors who have to teach them, and for rated pilots returning to flying or preparing for a flight review. The mathematics is algebra and trigonometry, with no calculus. Units are United States customary aviation units, with an appendix mapping them to practice elsewhere. It is an explanation, not a flight manual: the aircraft's own approved manual always governs.Open the first chapter and start building the working model of your airplane that lets new situations make sense on first acquaintance. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Condición: New. Print on Demand.

Paperback. Condición: new. Paperback. Four hundred cubic feet per minute per ton. A constant of 1.08 on the air side and 500 on the water side. Every heating, cooling, and refrigeration technician runs on numbers like these - and almost nobody can say where they come from, or when they stop being true.That is because the trade's arithmetic is scattered: a sizing table here, a manufacturer's bulletin there, a slide chart on the back of a pressure-temperature card, a rule of thumb passed down a shop until nobody remembers what it was derived from. It works until the job leaves standard conditions - a duct run at altitude, an air handler in a hundred-and-forty-degree attic, a nameplate that mixes two measurement systems. The technician who has only memorized the number is stuck the moment the table runs out. And a wrong number in this trade is never an abstraction: it is an oversized furnace, a starved coil, a callback, a compressor that dies young.This handbook was built to close that gap. It gathers the calculations a technician actually performs - on a service call, at a start-up, during a replacement estimate - and works each one through from the physical relationship that produces it to the number written on the invoice. Where a shortcut exists, the derivation that justifies it comes first, along with the conditions under which it fails.What you will take from it: One conversion method that handles any unit conversion, including ones you have never seen beforeThe sensible, latent, and total heat equations - and how to correct their constants when conditions are not standardA complete heat loss and heat gain calculation, from design conditions to room-by-room equipment selectionAirflow verified by duct traverse and by temperature rise, the fan laws, and duct sizing by friction loss against available static pressureThe refrigeration cycle read from two gauges and two thermometers - superheat, subcooling, compression ratio, and charge limits for the newer mildly flammable refrigerantsCombustion arithmetic: clocking a meter, input, output, efficiency, temperature rise, and gas pipe sizingPump curves, glycol corrections, and expansion tanks on the water side; amperage, voltage drop, and power factor on the electrical side - through operating cost and simple payback.The apparatus is built for learning and for the truck: 141 fully worked examples showing the equation, the substitution, and the units at every step; more than 400 end-of-chapter practice problems, each answered with a complete worked solution; a master conversion appendix with exact factors; every equation in the book collected in one place; reference data tables; a field quick reference; and a glossary of roughly 190 terms. Chapters are self-contained enough to open anywhere and cross-referenced enough to read straight through. Units follow United States practice, with an appendix for working any calculation in the units used across the English-speaking world.It is written for the apprentice meeting this material for the first time, the trade-school or community-college student with an exam ahead, the working technician tired of trusting numbers he cannot check, and the estimator or service manager who checks them.Stop working from numbers you cannot verify. Get your copy and start carrying the arithmetic that holds up when the table runs out. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Paperback. Condición: new. Paperback. Every student pilot is told what to do. Very few are told why, and the difference shows up at the worst possible moment: on a warm afternoon at a high field when the airplane will not climb, or on the turn from base to final when a little bottom rudder feels like the obvious correction.Aerodynamics is usually taught as a list of facts to be memorized before a test and then set aside. Stall speed becomes a number on a dial instead of an angle the wing reaches. Density altitude, trim and load factor stay as separate rules rather than consequences of a handful of relationships that could be rebuilt in a minute. The result is a pilot who can pass the test and still be surprised by the airplane, and an instructor who can demonstrate a maneuver but struggles to explain it.This handbook was written to close that gap. Across seventeen chapters in five parts it explains why airplanes behave the way they do, with the reasoning shown rather than asserted, so that a reader who has understood a few relationships can derive the rest instead of remembering it. Every equation is followed by a definition of every symbol with its units, and every worked example carries the arithmetic through with the units shown.What you will take from it: The air before the wing: pressure, temperature and humidity as one working number, and density altitude computed on the ramp rather than discovered on the runway.Lift and drag as cause and cost: angle of attack, the coefficient of lift curve, parasite and induced drag, the total drag curve and the region of reversed command.The airplane as a machine: wing planform and high-lift devices, stability and the center of gravity, trim, adverse yaw, and the propeller's four left-turning tendencies taught separately.Performance you can compute: takeoff roll, best angle against best rate of climb, range and endurance in wind, best glide, the stabilized approach, ground effect, crosswinds and wake turbulence.The edge of the envelope: load factor, maneuvering speed and what it does not protect, the V-g diagram, the stall as an angle rather than a speed, slow flight, spins, the cross-control stall and the turn-back examined with numbers.Energy management as the single model that ties the subject together: altitude, airspeed and power as one budget, and the decision that has to be made early.A working apparatus: fifty worked examples, one hundred and nineteen practice problems every one solved in full in the answer key, and appendices covering symbols, a formula reference, V-speeds, the standard atmosphere and international units.Five recurring features in every chapter connect the physics to the cockpit and to the lesson, including an instructor's brief on how to teach and demonstrate each point and the misreading the topic reliably produces. Suggested reading routes cover stall and spin awareness, performance and flight planning, a flight review, and teaching.It is written for student pilots who want the reasons behind the procedures, for certificated flight instructors who have to teach them, and for rated pilots returning to flying or preparing for a flight review. The mathematics is algebra and trigonometry, with no calculus. Units are United States customary aviation units, with an appendix mapping them to practice elsewhere. It is an explanation, not a flight manual: the aircraft's own approved manual always governs.Open the first chapter and start building the working model of your airplane that lets new situations make sense on first acquaintance. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Condición: New. Print on Demand.