Aqua-Hot will be doing inventory July 1st and 2nd and we will also be closed July 4th and 5th in observances of Independence Day. During this time, we will not be shipping any online orders until July 8th. Thank you!
Aqua-Hot Products
Model 175
Espar Burner — Hi-Quality, Military-grade Brass Fittings — Removable Cover
The Aqua-Hot 175 is a compact hydronic heating system engineered for serious adventurers who demand more from their gear. Purpose-built with rugged, military-grade components, it delivers endless hot water and quiet, reliable heat in every environment — from frozen alpine trails to remote desert camps. Its streamlined design maximizes space, simplifies service, and powers true off-grid independence, giving overlanders the confidence to push farther and stay longer with lifetime-ready durability.
The Aqua-Hot 175 is available in modular and black box formats, engineered with an Espar burner, smart installation efficiencies, and high-quality connections. Designed for the rigors of off-road travel, it delivers continuous hot water and dependable comfort wherever your adventure takes you.
RUGGED FEATURE HIGHLIGHTS
- - High-Altitude Ready - Engineered for extreme environments, the
175’s automatic fuel-to-O₂ calibration keeps the burner clean,
consistent, and maintenance-free, no add-on kits required.
- - Fuel-Smart for Off-Grid Living - Runs directly off your van’s fuel
supply, no need for supplemental tanks. Built for true boondocking
independence.
- - Targeted Heat Zones - Compact, whisper-quiet heat exchangers
can be placed exactly where you need them, eliminating hot and
cold spots inside your rig.
- - Continuous Hot Water Supply - Delivers 110–120°F water at
1.0 gpm — plenty for both kitchen and shower use, even in the
backcountry. A 25% increase over the 125 Series.
- - Ultra-Quiet Operation - Exterior combustion unit with its own
muffler keeps noise outside. Interior fans run at low decibels for
stealth camping and comfort.
- - Night Mode Stealth Heating - Reduced fan speed ensures
discreet, quiet heat through the night without sacrificing warmth.
- - Lifetime-Ready Durability - Engineered to endure the rigors of
overland travel and built to match the full lifespan of your vehicle
with proper maintenance.
- - Dual Power Flexibility - Operates on vehicle fuel or 120V shore
power for reliable heat and hot water wherever you’re camped.
- - Mission-Ready LCD Controller - Control up to three zones
independently with an easy-to-use interface, plus built-in test and
diagnostic functions.
- - Compact All-in-One System - One rugged unit delivers both hot
water and heat—simplifying installation and saving space for gear.
- - Nationwide Service Support - Backed by over 300 service centers
across North America for confidence wherever you roam.
Please contact your sales representative for more information on the 175-Modular Series.
| SPECIFICATIONS |
VALUE |
UNIT |
| Max Tank Pressure |
7 |
PSI |
| Watts (DC)/(AC) |
(57)/(1500) |
Watts |
| Voltage (DC)/(AC) |
(12)/(110) |
Volts |
| Tank Capacity |
2 |
Gal |
| Burner Model |
Espar S3 |
D5E/B5E |
| Burner Fuel |
Gasoline/ Diesel |
Fuel Type |
| Burner Rating |
5 |
kW |
| ZONE HEAT CIRCULATION |
| Pumps (MAX) |
2 |
Pumps |
| Power Consumption (MAX) |
40 |
Watts |
| Voltage (DC) |
12 |
Volts |
| INTERIOR HEATING |
| Maximum Heating Zones |
3 |
Zones |
| Cozy |
8,000 |
BTU |
| Whisper |
4,000 |
BTU |
| Half Cozy |
4,000 |
BTU |
| Domestic Water Heating
Flow Rate (Maximum) |
1 |
GPM |
| PHYSICAL SPECIFICATIONS |
| Dimensions |
17.66"L x 7.5"W x 11.5"H |
Inches |
| Dry Weight |
42 |
Pounds |
| Wet Weight |
56 |
Pounds |
| DIESEL BURNER SPECIFICATIONS |
| Heat Flow |
17,060 |
BTU |
| Fuel Consumption |
0.15-0.59 |
l/h |
| Coolant Pump Power Consumption |
18 |
Watts |
| Working Altitude |
10,000 |
Feet |
The single, self-contained (11.5"H x 7.5"W x 17.66"D) unit delivers highly
efficient heating and hot water, resulting in significant space and cost savings.
Compact Cozy Heat Exchangers (13.125" x 3.625" x 6.5") can be strategically
placed to deliver heat to up to 3 different zones throughout the van. The
exchangers can be installed either vertically or horizontally to easily integrate
with interior configurations.
The LCD Screen Controller allows independent
settings for up to 3 heating zones. Operation,
Testing, and Diagnostic features give the user total
control of their climate system.
For 40+ years, Aqua-Hot heating systems have set the standard for comfort on the road. The new 175 Series takes that legacy into the overland arena with a compact, military-grade hydronic heating system built for Class B campervan adventurers who demand more from their gear. The 175’s rugged construction ensures it keeps delivering heat and hot water as long as your coach is on the road.
Fueled directly from the vehicle’s tank, the 175 eliminates the need for extra fuel supplies — delivering true off-grid independence. Its advanced burner automatically calibrates the fuel-to-oxygen mix, ensuring clean, efficient performance without the sooting or service issues common in lesser systems.
A closed-loop thermal fluid design pushes heat exactly where it’s needed — galley, sleeping area, or seating zones — with quiet, compact exchangers. The rugged LCD controller puts command at your fingertips, offering independent zone control plus diagnostics for on-the-fly adjustments.
And when it’s time to wash off the trail, the 175 supplies continuous hot water at 1.0 gpm, holding a steady 110°–120°F for kitchen or shower use — even in the harshest environments.