Glossary of Terms — Page 5

What Does Sleeping Bag Season Rating Mean?

Sleeping bag "season" ratings (1 to 4, often shown as a range like "3-4 season") indicate the temperature range a bag is designed for — 1-season bags suit warm summer nights only, while 4-season bags are built for winter camping in near-freezing conditions. A "3-4 season" bag is the most common all-rounder for UK camping, comfortable from roughly spring through autumn.

What Does Spin Speed (RPM) Mean for Washing Machines?

Spin speed, measured in revolutions per minute (RPM), is how fast a washing machine's drum spins during the final cycle to remove water from clothes. Higher RPM (typically 1400-1600 for UK machines) extracts more water, shortening tumble-dryer time, but can increase noise, vibration and creasing — delicate fabrics usually use a lower spin setting regardless of the machine's maximum rating.

What Does Steam Output (g/min) Mean on an Iron?

Steam output is the rate at which a steam iron releases steam, measured in grams per minute, and is a key indicator of how quickly it tackles creases — typically 30-50g/min for continuous steam, with a separate, higher steam-boost figure for stubborn wrinkles. A higher figure generally means faster, more effective ironing on thicker fabrics.

What Does Thickness (mm) Mean for Yoga Mats?

Yoga mat thickness, usually 3-6mm for general use, is a trade-off between cushioning and stability: thinner mats (around 3mm) give better balance and floor contact for standing poses, while thicker mats (5-6mm+) cushion knees and joints better for floor-based or restorative practice. Travel mats are typically thinner still, prioritising low weight and pack size over cushioning.

What Does THX Certification Mean for Home Cinema?

THX certification is an independent standard testing how accurately an audio/video product reproduces sound and picture as the content creator intended, covering areas like distortion, frequency response and viewing/listening angles. A THX-certified soundbar or system has passed these standardised benchmarks, offering a point of comparison across brands beyond a manufacturer's own marketing claims.

What Does Tog Rating Mean for Carpet Underlay?

Like duvets, carpet underlay is rated in tog for thermal insulation — a higher tog underlay helps retain more heat in the room, which can meaningfully reduce heat loss through ground floors. Underlay tog is separate from its cushioning/support properties, so a product is generally chosen by balancing its tog rating against the right density and thickness for the carpet and traffic level above it.

What Does Torque (Nm) Mean on a Power Drill?

Torque, measured in newton metres (Nm), is the twisting force a drill or driver can apply. Combi drills typically offer an adjustable clutch with multiple torque settings so screws can be driven flush without overdriving or stripping them, while a separate, higher hammer-drilling torque figure applies when drilling into masonry.

What Does TPI (Teeth Per Inch) Mean on a Saw Blade?

TPI is the number of teeth along one inch of a saw blade. Low-TPI blades (fewer, larger teeth) cut faster and are suited to thick, soft materials like timber, while high-TPI blades (more, smaller teeth) cut more slowly but leave a finer, smoother finish suited to thin material, plastics or metal.

What Does U-Value Mean for Insulation?

U-value measures how much heat passes through a material or structure — the lower the number, the better the insulation performance. It is the opposite of R-value (used more in the US), where a higher figure is better, so UK insulation products are typically compared by looking for the lowest U-value that fits the required building regulation for that part of a home.

What Does UV-Stabilised Mean for Artificial Plants?

UV-stabilised artificial plants are made with additives in the plastic that resist fading and becoming brittle under prolonged sunlight exposure, unlike standard indoor-grade artificial foliage. This makes UV-stabilised products the more suitable choice for anything positioned outdoors or in a bright conservatory, where non-stabilised greenery can visibly discolour within a single UK summer.

What Does WRAS Approval Mean for Taps & Plumbing Fittings?

WRAS (Water Regulations Advisory Scheme) approval confirms a tap, mixer or plumbing fitting has been tested against UK Water Supply (Fluid Categories) Regulations, covering things like preventing contaminated water from being drawn back into the mains supply. Fittings without WRAS approval may not be compliant for connection to the UK mains water system.

What is 1/2 inch?

When referring to the size of items like garden hoses and watering equipment, "1/2 inch" describes the internal diameter of a tube or pipe. This measurement indicates the volume of water that can flow through it per unit of time – essentially, how quickly it will deliver water. A larger 1/2 inch hose will generally allow for a greater flow rate compared to a smaller one. Consider this when choosing equipment; a larger diameter often means easier use, especially when dealing with high pressure or longer distances. It’s also worth noting that hoses with a larger internal diameter may be slightly heavier.