PRACTICAL ANSWERS + SIMPLE TOOLS
A house that works.
A plan you understand.
How much insulation? How deep a pipe? Will the well keep up? Practical answers, worked examples and calculators for the systems your home depends on.
What are you working on?
Find the cause, then compare the improvement.
Check source, yield and treatment in order.
Start with essential loads and autonomy.
Connect frost, levels, trench geometry and material quantities.
NEW PRACTICAL GUIDES
Fresh answers for common home-system decisions.
Start with a clear explanation, then use the linked calculator and keep the assumptions with the result.
Plan a low-temperature hydronic heating circuit
Connect room heat loss, emitter output, water flow, pump head and commissioning without treating one number as the whole design.
Estimate insulation savings without promising a false payback
Build a transparent before-and-after estimate, then separate modelled transmission savings from measured whole-home bills.
Four quick checks for a home water system
Turn pipe dimensions, tank levels, pressure settings and pump run time into four useful commissioning numbers.
Plan the low-voltage DC path from battery to inverter
Turn load power into current, voltage drop and runtime without treating a calculator as a cable design.
BROWSE BY HOME SYSTEM
Nine connected topics. One practical library.
Open a topic to see its explanations and calculators together, in a useful working order.
Insulation
Find heat losses, compare insulation and avoid trapping moisture inside a wall.
Frost & ground
Separate frost protection, pipe cover and structural foundation design before digging.
Wells & water
Read well logs, understand drawdown and turn flow measurements into pump and storage questions.
Water treatment
Choose stages from measured contaminants, treatment goals and required flow.
Wastewater
Understand the tank, soil treatment area, hydraulic load and maintenance obligations.
Independent energy
Separate energy, peak power and autonomy before sizing solar, batteries and backup.
Construction
Separate drawing dimensions, geometric volume, allowance and supplier constraints.
Electrical power
Turn load power into current, voltage drop and runtime without treating a calculator as a cable design.
Heating
Compare load and equipment at matching temperatures, plan auxiliary heat and test the installed system.
YOUR FIELD KIT
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THE HOME SYSTEMS LIBRARY
Nine home systems. Connected decisions.
Each guide explains what to measure, how to use the numbers and what to check before buying or building.
A warmer house starts with the right diagnosis.
Find heat losses, compare insulation and avoid trapping moisture inside a wall.
How deep should pipes and foundations go?
Separate frost protection, pipe cover and structural foundation design before digging.
Will a well supply the water your home needs?
Read well logs, understand drawdown and turn flow measurements into pump and storage questions.
Which water filters do you actually need?
Choose stages from measured contaminants, treatment goals and required flow.
Plan a septic system around the site.
Understand the tank, soil treatment area, hydraulic load and maintenance obligations.
Build a power plan that survives a cloudy week.
Separate energy, peak power and autonomy before sizing solar, batteries and backup.
Why does water collect on cold windows and walls?
Use temperature, humidity and dew point to distinguish condensation from other moisture problems.
How much rainwater can your roof collect?
Estimate catchment yield, understand storage limits and keep rainwater separate from drinking water.
Prepare the house before the first hard freeze.
Walk through exposed water systems, heating dependencies and outage actions while there is time to fix them.
Choose backup power around the loads that must run.
Understand running power, motor starts, safe placement and the connection to the house.
Choose a water pipe size without guessing
Connect fixture demand, internal diameter, velocity, pressure loss and pump performance.
Plan domestic hot water as an energy system
Estimate heating energy, then account for peak demand, recovery, storage and safety.
Plan how an off-grid battery gets recharged
Connect usable deficit, charger power, source limits, losses and recovery time.
Ventilate an airtight home without losing control of heat
Separate required fresh air, local exhaust, infiltration and heat recovery.
Protect exposed pipes before relying on heat trace
Reduce exposure, insulate correctly, choose controls and plan for a power failure.
Understand pressure, head and flow in a private water system
Measure static and dynamic pressure, include elevation and read the pump at its operating point.
Plan a gravity drain from elevations, not appearances
Turn a required grade into invert levels while protecting cover, access and the downstream system.
Plan and verify an ion-exchange water softener
Translate a hardness result and household water use into a defensible capacity, regeneration and verification plan.
Read a private-well water test before choosing treatment
Check the sample, units, detection limits and health context before comparing equipment.
Maintain a home water-treatment train as one system
Track flow, pressure, capacity, sanitation and verification across every treatment stage.
Estimate a concrete order without hiding the assumptions
Separate drawing dimensions, geometric volume, allowance and supplier constraints.
Plan trench quantities without treating excavation as a safe shape
Estimate spoil while keeping utilities, collapse protection, water and access as separate decisions.
Size the roof-drainage path from rainfall to safe discharge
Connect roof area and design intensity to gutters, outlets, downpipes and foundation drainage.
Plan the low-voltage DC path from battery to inverter
Turn load power into current, voltage drop and runtime without treating a calculator as a cable design.
Size a heat pump from the building load and cold-weather capacity
Compare load and equipment at matching temperatures, plan auxiliary heat and test the installed system.
Plan off-grid energy through several low-sun days
Build a period energy balance, preserve battery reserve and define when backup generation starts.
Turn frost requirements into foundation levels on site
Separate the local frost criterion, structural bearing level, final grade and excavation level before digging.
Plan household water for a power or supply outage
Separate drinking water from service water, identify electrical dependencies and test a realistic operating plan.
Prepare a pumped wastewater system for a power outage
Identify powered components, establish the real emergency buffer and reduce flow before sewage backs up.
Diagnose pressure-tank drawdown and rapid pump cycling
Use actual pressures, usable drawdown and observed run times to separate tank, switch, demand and pump problems.
Use storage to bridge a low-yield well and peak household demand
Separate sustainable source flow, stored volume and delivery pressure before sizing a cistern or break tank.
Four quick checks for a home water system
Turn pipe dimensions, tank levels, pressure settings and pump run time into four useful commissioning numbers.
Find and quantify a hidden household water leak
Use the water meter, simple isolation tests and a timed measurement to turn unexplained consumption into a repairable fault.
Reduce hot-water wait and distribution waste
Measure the water stored between heater and outlet, explain the real wait time and compare compact piping, local heating and controlled recirculation.
Estimate insulation savings without promising a false payback
Build a transparent before-and-after estimate, then separate modelled transmission savings from measured whole-home bills.
Read a well pumping test before sizing the pump
Keep flow, water level, elapsed time, recovery and intake position together so one attractive number does not hide a weak test.
Plan a low-temperature hydronic heating circuit
Connect room heat loss, emitter output, water flow, pump head and commissioning without treating one number as the whole design.
Plan a heating buffer tank without guessing
Separate the cycling problem, surplus heat, usable temperature range and existing system volume before selecting a tank.
Plan useful hot-water storage for a household
Translate tank litres into delivered hot water by checking temperatures, peak draws, recovery time and energy availability.
Plan septic service from measured sludge and scum
Replace a generic pump-out calendar with safe measurements, local service criteria and a simple record of how the tank changes.
Turn a single-phase appliance load into a circuit brief
Collect the inputs an electrician needs, estimate steady current and voltage drop, and keep protection and cable selection as explicit design decisions.
Measure masonry and screed before ordering materials
Turn drawings and site measurements into transparent quantities without confusing an order estimate with structural or product design.
Measure paint and tile quantities before buying
Build a checkable room finish take-off from measured surfaces, declared product coverage and explicit rounding decisions.
Measure roof pitch and covering quantities safely
Turn plan dimensions and a verified pitch into a transparent first material quantity while keeping layout and safety decisions separate.
Turn roof runoff into a buildable drainage set-out
Carry a design rainfall from the connected roof area through outlet capacity, gutter fall, overflow and final discharge.
Plan flooring and wallpaper without hiding waste
Separate measured area, effective product coverage, layout allowance and whole-pack purchasing.
Estimate plaster and drywall from a measured layout
Turn a site sketch into reviewable quantities without hiding thickness, product consumption or cutting allowance.
Turn a ventilation requirement into airflow and operating energy
Keep air-change assumptions, room distribution, measured fan performance and electricity use as separate checks.
Plan a sump pump system for cycling, discharge and power outages
Turn measured water levels and wet-weather inflow into a maintainable pumping and backup plan.
YOUR CALCULATION BENCH
Put numbers to the next decision.
Radiator output at lower water temperature
Estimate how a radiator’s published heat output changes at a different supply, return and room temperature.
Hydronic heating flow rate
Convert a heating load and design supply-return temperature difference into a water-flow estimate.
DC cable area for a voltage-drop target
Estimate the copper conductor area needed to keep steady DC voltage drop below a chosen percentage.
Pipe bedding and surround material volume
Estimate separate bedding and pipe-surround volumes for one uniform trench segment, including pipe displacement and an order allowance.
Gravity-tank water pressure at an outlet
Estimate the pressure available from the lowest tank water level after elevation and entered flow losses.
Filter backwash flow and water use
Check the backwash flow required by a cylindrical media vessel against the water supply available at the filter.
Rainwater first-flush volume
Estimate the initial roof runoff to divert before sending rainwater toward storage.
Hot-water tank recovery time
Estimate the energy, cost and ideal time needed to heat a stored volume between two temperatures.
KNOW WHAT THE NUMBER MEANS
Useful estimates come with their assumptions.
A pipe-depth calculation starts with your local cover requirement. A battery calculation starts with your loads. The guides help you collect the right inputs and understand the limits.
See the frost-depth example