Sovereignty Module: Hold the Heat
Hold the Heat
Complete Insulation, Climate Control, and Thermal Management Guide
Complete Insulation, Climate Control, and Thermal Management Guide
Heat management determines whether a community thrives or merely survives. Proper insulation keeps homes warm in winter, cool in summer, and reduces fuel consumption by 50-80%. This campaign covers insulation materials, installation, and passive climate control.
Chapter 1: Insulation Materials
| Material | R-Value per Inch | Fire Resistance | Moisture Resistance | Availability |
|---|---|---|---|---|
| Straw bale | R-1.5 to R-3 | Low (treat with borax) | Low (must stay dry) | Very high |
| Wool (sheep) | R-3.5 to R-4 | Good (self-extinguishing) | Good (absorbs and releases) | Moderate |
| Cotton (denim) | R-3.5 | Low (treat with borax) | Low | Moderate (salvage) |
| Cellulose (shredded paper) | R-3.2 to R-3.8 | Good (if treated with borax) | Moderate | High (salvage) |
| Sawdust | R-2.5 | Low | Low | High |
| Wood shavings | R-2.5 | Low | Low | High |
| Cork | R-3.6 | Good | Excellent | Low (specific trees) |
| Cattail/reed | R-2 to R-3 | Low | Low | High (wetlands) |
| Fiberglass (salvaged) | R-3.1 to R-3.7 | Excellent | Good | Moderate (salvage) |
| Foam board (salvaged) | R-4 to R-6.5 | Varies | Excellent | Moderate (salvage) |
| Earth/adobe (mass) | R-0.2 (but high thermal mass) | Excellent | Moderate | Very high |
| Air gap (sealed) | R-1 per inch (still air) | N/A | N/A | Free |
R-value: Resistance to heat flow. Higher = better insulation. Recommended total wall R-value: R-13 to R-21 (cold climates), R-11 to R-15 (moderate), R-5 to R-11 (mild).
Chapter 2: Passive Solar Design
| Principle | Implementation | Effect |
|---|---|---|
| South-facing windows (Northern Hemisphere) | Large windows on south wall | Captures winter sun (low angle) |
| Roof overhang | 2-3 foot overhang on south side | Blocks summer sun (high angle), admits winter sun |
| Thermal mass | Stone, concrete, or water containers inside | Absorbs heat during day, releases at night |
| Cross ventilation | Windows on opposite walls | Natural cooling in summer |
| Earth sheltering | Build into hillside or berm earth against walls | Stable temperature (55-60F year-round) |
| Light colors (exterior) | White or light-colored walls and roof | Reflects summer heat |
| Dark colors (interior mass) | Dark floor or wall behind south windows | Absorbs solar heat |
Chapter 3: Heating Systems
| System | Fuel | Efficiency | Complexity | Best For |
|---|---|---|---|---|
| Open fireplace | Wood | 10-15% | Low | Ambiance (poor heating) |
| Enclosed wood stove | Wood | 50-70% | Low | Single room heating |
| Masonry heater (Russian/Finnish) | Wood | 80-90% | High | Whole house (burns hot, stores heat in mass) |
| Rocket mass heater | Wood (small sticks) | 80-90% | Moderate | Efficient heating with minimal fuel |
| Radiant floor (hydronic) | Any (heats water) | 85-95% | High | Even, comfortable whole-house heat |
| Hypocaust (Roman) | Wood | 60-70% | High | Underfloor heating (historical) |
| Central furnace (forced air) | Wood, coal, gas | 60-80% | High | Large buildings |
Chapter 4: Rocket Mass Heater
| Component | Material | Function |
|---|---|---|
| Feed tube | Insulated steel or brick (vertical) | Burns wood vertically (gravity-fed) |
| Burn tunnel | Firebrick (horizontal) | Primary combustion |
| Heat riser | Insulated vertical chamber | Creates intense draft, secondary combustion (burns smoke) |
| Barrel (heat exchanger) | Steel barrel over heat riser | Radiates heat to room |
| Mass bench | Cob, brick, or stone with exhaust duct inside | Stores heat for 12-24 hours |
| Exhaust | Chimney (short, since most heat is extracted) | Vents remaining combustion gases |
A rocket mass heater burns 1/5 to 1/10 the wood of a conventional stove while heating a room for 12-24 hours from a single firing. The mass bench stays warm long after the fire goes out.
Chapter 5: Cooling Without Electricity
| Method | Temperature Reduction | Water Required | Best Climate |
|---|---|---|---|
| Cross ventilation | 5-10F | None | Any with breeze |
| Evaporative cooler (swamp cooler) | 15-25F | Moderate | Dry/arid |
| Thermal chimney (solar chimney) | Draws air through building | None | Hot climates |
| Earth tubes (ground-coupled) | Cool to 55-60F ground temp | None | Any |
| Night flushing | Cools thermal mass overnight | None | Hot days, cool nights |
| Shade trees (deciduous) | 10-20F under canopy | None (irrigation for trees) | Any |
| White roof/walls | 10-20F cooler surface | None | Hot, sunny |
| Underground/earth-sheltered | Stable 55-60F | None | Any |
Chapter 6: Weatherization
| Task | Material | Impact |
|---|---|---|
| Seal air leaks (caulk, weatherstrip) | Caulk, rope, cloth strips | 15-30% energy savings |
| Insulate attic/ceiling | Any insulation material | 25-40% energy savings |
| Insulate walls | Blown or batt insulation | 15-25% energy savings |
| Insulate floor/foundation | Rigid board or batt | 10-15% energy savings |
| Storm windows (second pane) | Glass or plastic film | 10-20% energy savings |
| Insulated shutters | Wood + insulation | Close at night for 20-30% window heat loss reduction |
| Door sweeps | Rubber, brush, or cloth | Seals gap under doors |
Reference Card
- R-value measures insulation effectiveness: higher = better. Target R-13 to R-21 for walls.
- Straw bales, wool, cellulose, and sawdust are effective insulation from natural materials
- South-facing windows + thermal mass + roof overhang = passive solar heating (free)
- Rocket mass heater: burns 1/5 the wood of a stove, heats for 12-24 hours per firing
- Sealing air leaks is the single most cost-effective energy improvement (15-30% savings)
- Evaporative cooling drops temperature 15-25F in dry climates using only water and airflow
- Earth-sheltered buildings maintain 55-60F year-round with minimal heating or cooling
- Thermal mass (stone, concrete, water) absorbs heat by day and releases it at night
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