Laars Mini Therm

MINI-THERM Gas-Fired Residential Hydronic Boilers

Reliable, Efficient and Quiet

The Compact Mini-Therm For Superb Home Heating Comfort TM

LAARS MINI-THERM gas-fired

service jacket, low-mass heat

Natural or propane gas models

residential hydronic boiler is the

exchanger and a super-quick

are available for all ignition types

ideal heating appliance that saves

heating response to meet your

are capable of higher efficiencies -

home owners money on heating

residential application

even at high altitudes.

costs and has plenty of capacity to

requirements. Ideal for new

keep even the largest home

homes or replacement boilers, the

Mini-Therm boilers offer

comfortable on the coldest days.

Mini-Therm boiler operates

exceptional value with “high

The compact boiler comes in three

efficiently to save energy and

performance hydronics” that give

varieties (JVT-standing pilot, JVS-

minimize utility bills, and is very

customers the highest

spark ignition, and JVH-hot

compact, to save space. It's also

performance at the lowest cost.

surface ignition with induced

easy to install, and its reliability

By far, Mini-Therm is the right

draft) to meet your installation

has been proven in the field over

solution for any size residential

needs... and your budget.

many years to give you years of

home heating system.

heating comfort and excellent Newly improved Mini-Therm,

dependability.

features an attractive and easy-to-

Mini-Therm Features • Attractive, new easy-to-service jacket • Compact design = small footprint

Water In

Built-in Draft Diverter

Relief Valve Water Out

• Six sizes: 50, 75, 100, 125,160 & 225 to suit any home • Copper-finned tube heat exchanger with cast iron “wet walls” • On/Off or 2-Stage firing modes (varies by model) • Up to 84% AFUE • Optional circulating pump

Copper Finned Tubes

Gas In Gas Valve

Cast-Iron "Wet Wall"

Drain Hose Bibb Connection

Burner

• Several venting choices include side-wall or chimney options • Easy to install

The Right Solution for Home Heating Systems

Mini-Therm JV that 2-Stage firing allows the unit to match the heating load requirement, reducing shortcycling in homes that have small heating zones that don’t require the full boiler capacity… another way to save energy.

Extremely popular with homeowners, JVT & JVS models offer a new attractive and easy-toservice jacket. Well-known for their economy, both models come with a built-in draft diverter and automatic vent damper to stop your valuable fuel payments from disappearing up the chimney in wasted heat. JVT-standing pilot ignition models use single-stage, on/off firing modes for all six sizes. JVS-spark ignition models also use the on/ off mode for the two smaller sizes JVT JVS Size 50 75 100 125 160 225

Input BTU/h x 1000 50 75 100 125 160 225

kW 14.6 21.9 29.1 36.6 46.8 65.9

JVT & JVS Features: • Standing pilot (JVT) or intermittent spark (JVS) ignition • Up to 84.4% AFUE (50 & 75), but offer energy saving “Low/High” firing for sizes 100, 125, 160 & 225. The advantage is

JVT Firing Mode On/Off On/Off On/Off On/Off On/Off On/Off

JVS Firing Mode On/Off On/Off 2-Stage 2-Stage 2-Stage 2-Stage

Heat Capacity BTU/h x 1000 kW 42 12.3 63 18.5 84 24.6 105 30.8 134 39.3 189 55.4

• Single stage on/off & 2-Stage firing modes • Sleek jacket removes easily for quicker service

Net IBR BTU/h x 1000 kW 36.5 10.7 54.8 16.1 73.0 21.4 91.3 26.8 116.9 34.3 164.3 48.1

JVT

JVS

AFUE % AFUE % 80.2 84.4 80.5 84.0 80.7 82.0 80.7 81.9 81.0 80.2 81.5 81.8

Mini-Therm JVi Mini-Therm JVH uses an H.S.I. (hot surface ignition system) to operate all six sizes in singlestage, on/off firing modes. The boiler is equipped with a draft blower that permits side-wall or chimney venting. Compact models are also easy to install, operate and maintain.

JVH Size 50 75 100 125 160 225

Input BTU/h x 1000 50 75 100 125 160 225

JVH Features: • Hot surface ignition system • Up to 83% AFUE • Single-stage on/off firing mode • Induced draft system with gravity operated vent damper

Firing kW 14.6 21.9 29.1 36.6 46.8 65.9

Mode On/Off On/Off On/Off On/Off On/Off On/Off

Heat Capacity BTU/h x 1000 41.5 62.3 82 102.5 131.2 184.5

Net IBR kW 12.1 18.2 24 30 38.4 54

BTU/h x 1000 36.1 54.2 72.6 89.6 114.1 160.4

AFUE kW 10.5 15.8 21.3 26.7 33.4 46.9

% 83.4 83.2 82.4 82.4 82.3 82.2

Mini-Therm JV

V Vent Damper (optional in Canada)

Draft Diverter

Vent Damper Harness 1-1/4 NPT

D

A/2

In (Return) PRV

Front

B

7 18

9-1/4 24

C

Out (Supply) T&P Gauge

Left

23-5/8 60

Top

Dimensions shown in inches cm.

E

JVT JVS Size 50 75 100 125 160 225

A

B

Dimensions D

C

E

F

inches cm

inches cm

inches cm

inches cm

inches cm

13-3/8 13-3/8 16-7/8 16-7/8 20-3/8 25-5/8

27-3/4 27-3/4 28-3/4 28-3/4 28-3/4 31-1/2

23-5/8 24-1/8 24-1/8 23-5/8 23-5/8 23-1/4

21-3/4 21-3/4 22-3/4 22-3/4 22-3/4 24-3/4

26-1/2 27-1/2 27-1/2 27-1/2 27-1/2 27-1/2

34 34 43 43 52 65

71 71 73 73 73 80

60 61 61 60 60 59

55 55 58 58 58 63

A

67 70 70 70 70 70

V

inches cm

18 18 18 18 18 20

46 46 46 46 46 51

Water Gas Conn. Conn.

inches cm

4 5 5 6 6 7

10 13 13 15 15 18

Approx. Weight

in.

in.

lbs.

kg

1-1/4 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4

1/2 1/2 1/2 1/2 1/2 1/2

120 126 134 138 164 181

54 57 61 63 74 82

Mini-Therm JVi

Front

Right

Dimensions shown in inches cm.

JVH Size 50 75 100 125 160 225

Dimensions B

A

C

Water Conn.

Gas Conn.

Approx. Weight

inches

cm

inches

cm

inches

cm

inches

inches

lbs.

kg

13-3/8 13-3/8 16-7/8 16-7/8 20-3/8 25-5/8

34 34 43 43 52 65

3-1/8 4-1/4 5-3/4 5-1/2 7-1/4 10

8 11 15 14 18 25

2-7/8 2 2-7/8 2 2 2

7 5 7 5 5 5

1-1/4 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4

1/2 1/2 1/2 1/2 1/2 1/2

160 165 180 185 210 225

73 75 82 84 99 102

20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 1355 Kuehner Drive, Simi Valley, CA 93063 • 800.900.9276 • Fax 800.559.1583 (Sales, Service) 480 S. Service Rd. West, Oakville, Ontario, Canada L6K 2H4 • 905.844.8233 • Fax 905.844.2635 A subsidiary of BRADFORD WHITE Corporation

www.Laars.com

Litho in U.S.A. © Laars Heating Systems 0508 Document 1086H