Endurous Climate · in development

Built around the work you are planning.

Choose a starting point to see what can stay, what might change and what remains optional. The examples use generic equipment, not validated Endurous product designs.

System options

New build

Major renovation

Light retrofit

Plan the whole system together.

Plan the envelope, dedicated ventilation ducts, heat pump, room terminals and floor heating together. Reserve accessible space for filters, pumps, drainage and any future storage.

New build: Plan the envelope, dedicated ventilation ducts, heat pump, room terminals and floor heating together. Reserve accessible space for filters, pumps, drainage and any future storage. — Fresh-air supply
Extract / exhaust air
Water supply / return
Controls
Optional equipment
Open the detailed cutaway ↗
Illustrative cutaways, not installation drawings. Routes are separated for clarity; equipment, spacing, capacity and drainage require site-specific design. Dashed purple outlines mark optional equipment.
Read the cutaway
**Balanced ventilation**
Separate outdoor-air and exhaust paths. Central recovery is shown in the first two options; local balanced units in the retrofit.
**Room equipment**
Generic room terminals heat or cool. Cooling can need condensate drainage; the dotted grey route represents a drain.
**Floor heating**
A closed water loop provides steady warmth. The floor shown is for heating; floor cooling is not assumed.
**Heat pump**
The first two examples use water-based distribution. The light retrofit retains an existing ductless refrigerant system.
**Thermal storage**
Optional storage holds useful heating or cooling. The illustrated buffer contains system water, not drinking water.
**Solar and battery**
Optional electricity generation and storage connect through suitable power electronics and electrical protection, not directly to room sensors.
**Sensors and controls**
Room readings inform coordination. Equipment protections remain active; a dotted control link is a relationship, not a wiring design.
**Cooking exhaust**
The range hood exhausts outdoors on its own path. Grease-laden cooking exhaust does not pass through the recovery core.

Make the most of open walls and floors.

Retain useful equipment after a compatibility check. Add ventilation routes, a room terminal or a floor-heating zone where the building work allows it. The highlighted floor area represents one possible new zone.

Major renovation: Retain useful equipment after a compatibility check. Add ventilation routes, a room terminal or a floor-heating zone where the building work allows it. The highlighted floor area represents one possible new zone. — Fresh-air supply
Extract / exhaust air
Water supply / return
Controls
Optional equipment
Open the detailed cutaway ↗
Illustrative cutaways, not installation drawings. Routes are separated for clarity; equipment, spacing, capacity and drainage require site-specific design. Dashed purple outlines mark optional equipment.
Read the cutaway
**Balanced ventilation**
Separate outdoor-air and exhaust paths. Central recovery is shown in the first two options; local balanced units in the retrofit.
**Room equipment**
Generic room terminals heat or cool. Cooling can need condensate drainage; the dotted grey route represents a drain.
**Floor heating**
A closed water loop provides steady warmth. The floor shown is for heating; floor cooling is not assumed.
**Heat pump**
The first two examples use water-based distribution. The light retrofit retains an existing ductless refrigerant system.
**Thermal storage**
Optional storage holds useful heating or cooling. The illustrated buffer contains system water, not drinking water.
**Solar and battery**
Optional electricity generation and storage connect through suitable power electronics and electrical protection, not directly to room sensors.
**Sensors and controls**
Room readings inform coordination. Equipment protections remain active; a dotted control link is a relationship, not a wiring design.
**Cooking exhaust**
The range hood exhausts outdoors on its own path. Grease-laden cooking exhaust does not pass through the recovery core.

Start with what already works.

Keep suitable ducted or ductless heating and cooling. Add supported controls, room sensing and targeted ventilation. The example shows paired supply/extract wall units; the refrigerant lines belong to the existing heat pump, not the ventilation units.

Light retrofit: Keep suitable ducted or ductless heating and cooling. Add supported controls, room sensing and targeted ventilation. The example shows paired supply/extract wall units; the refrigerant lines belong to the existing heat pump, not the ventilation units. — Fresh-air supply
Extract / exhaust air
Existing refrigerant circuit
Controls
Optional equipment
Open the detailed cutaway ↗
Illustrative cutaways, not installation drawings. Routes are separated for clarity; equipment, spacing, capacity and drainage require site-specific design. Dashed purple outlines mark optional equipment.
Read the cutaway
**Balanced ventilation**
Separate outdoor-air and exhaust paths. Central recovery is shown in the first two options; local balanced units in the retrofit.
**Room equipment**
Generic room terminals heat or cool. Cooling can need condensate drainage; the dotted grey route represents a drain.
**Heat pump**
The first two examples use water-based distribution. The light retrofit retains an existing ductless refrigerant system.
**Solar and battery**
Optional electricity generation and storage connect through suitable power electronics and electrical protection, not directly to room sensors.
**Sensors and controls**
Room readings inform coordination. Equipment protections remain active; a dotted control link is a relationship, not a wiring design.
**Cooking exhaust**
The range hood exhausts outdoors on its own path. Grease-laden cooking exhaust does not pass through the recovery core.

Solar, batteries and thermal storage are choices, not prerequisites. Their value depends on the home, tariff and installation.

Fresh air has its own path.

An energy-recovery ventilator (ERV) transfers heat and some moisture between separate air streams. Where needed, a dedicated outdoor-air system (DOAS) adds active conditioning downstream.

Condition only as needed.

Ventilation: use an available bypass when conditions suit.
Recovery: exchange heat and moisture when helpful.
Heating: add warmth after recovery when needed.
Cooling / drying: remove heat or moisture, with drainage and any required reheat.

Explore the air-quality diagram

An energy-recovery ventilator (ERV) transfers heat and some moisture between separate air streams. Where needed, a dedicated outdoor-air system (DOAS) adds active conditioning downstream. — Fresh-air supply
Extract / exhaust air
Optional equipment
Outdoor air enters on the supply path.
A suitable particle filter treats incoming air; a separate extract filter protects the core.
Separate core channels exchange heat and moisture. The dashed upper path is an optional bypass, not a connection to exhaust air.
An optional coil heats, or cools and removes moisture when conditions allow. Condensate drains from a pan and a correctly designed trap.
Optional reheat adjusts supply temperature after dehumidification when the design requires it.
Room extract air travels back through the recovery unit to outdoors on its own path.
The drawing separates air paths to explain their roles. Real core leakage, pressure balance, frost protection, filter resistance and maintenance must be addressed. An ERV is not an active dehumidifier or a contaminant filter.

Comfort with clear priorities.

Safety → air quality → comfort → efficiency → optimization.

Protect the home

Required ventilation and equipment protection take priority over savings. CO₂ is one input, not a complete measure of air quality. Dedicated safety alarms remain necessary.

Design for moisture

Cooling surfaces need dew-point checks and appropriate drainage. Hydronic systems need leak detection, isolation and service access. Bathroom extraction may use a recovery unit only where the manufacturer and local requirements permit it.

Coordinate available energy

A battery stores electricity; thermal storage holds useful heating or cooling. Endurous aims to coordinate them with weather, room needs and backup priorities. The ventilation and room-conditioning systems remain distinct.

Endurous Climate · in development

Endurous Climate is in development. HYDRALED is a proposed hydronic room-terminal concept, not the product depicted here. Its dimensions, performance, noise, drainage and availability are not validated. Current work produces offline planning proposals; installed-device integration and field validation remain ahead.

Technical background: DOE · ventilation · ASHRAE · DOAS · EPA · Air quality

Plan your starting point ↗Explore Air & Climate ↗